Lithium’s limits to growth

7 08 2017

The ecological challenges of Tesla’s Gigafactory and the Model 3

From the eclectic brain of Amos B. Batto

A long but well researched article on the limitations of the materials needed for a transition to EVs…..


Many electric car advocates are heralding the advent of Tesla’s enormous battery factory, known as the “Gigafactory,” and its new Model 3 electric sedan as great advances for the environment.  What they are overlooking are the large quantities of energy and resources that are consumed in lithium-ion battery manufacturing and how these quantities might increase in the future as the production of electric vehicles (EVs) and battery storage ramps up.

Most of the credible life cycle assessment (LCA) studies for different lithium-ion chemistries find large large greenhouse gas emissions per kWh of battery. Here are the CO2-eq emissions per kWh with the battery chemistry listed in parentheses:
Hao et al. (2017): 110 kg (LFP), 104 kg (NMC), 97 kg (LMO)
Ellingsen et al. (2014): 170 kg (NMC)
Dunn et al. (2012): 40 kg (LMO)
Majeau-Bettez et al. (2011): 200 kg (NMC), 240 kg (LFP)
Ou et al (2010): 290 kg (NMC)
Zackrisson et al (2010): 440 kg (LFP)

Dunn et al. and Hao et al. are based on the GREET model developed by Argonne National Laboratory, which sums up the steps in the process and is based on the estimated energy consumption for each step. In contrast, Ellingsen et al. and Zackrisson et al. are based on the total energy consumption used by a working battery factory, which better captures all the energy in the processing steps, but the data is old and the battery factory was not very energy efficient, nor was it operating at full capacity. Battery manufacturing is getting more energy efficient over time and the energy density of the batteries is increasing by roughly 7% a year, so less materials are needed per kWh of battery. It is also worth noting that no LCA studies have been conducted on the NCA chemistry used by Tesla. NCA has very high emissions per kg due to the large amount of nickel in the cathode, but is very energy dense, so less total material is needed per kWh, so it is probably similar in emissions to NMC.

The big debate in the LCA studies of battery manufacturing is how much energy is consumed per kWh of battery in the battery factory. In terms of MJ per kWh of battery, Ellingsen et al. estimate 586 MJ, Zachrisson et al. estimate 451 MJ and Majeu-Bettez et al. estimate 371-473 MJ. However, the energy for the drying rooms and factory equipment is generally fixed, regardless of the throughput. Ellingsen et al (2014) found that the energy expended to manufacture a kWh of battery could vary as much as 4 times, depending on whether the factory is operating at full capacity or partial capacity. Since the Gigafactory will probably be operating a full capacity and energy efficiency is improving, let’s assume between 100 MJ and 150 MJ per kWh of battery in the Gigafactory (which converts to 28 – 42 kWh per kWh of battery). It is unlikely to be significantly less, because it is more energy efficient to burn natural gas for the drying rooms than use electric heaters, but the Gigafactory will have to use electric heaters to meet Musk’s goal of 100% renewable energy.

If producing 105 GWh of batteries per year at 100 – 150 MJ per kWh, plus another 45 GWh of packs with batteries from other factories at 25 MJ per kWh, the Gigafactory will consume between 3,229 and 4,688 GWh per year, which is between 8.3% and 12.0% of the total electrical generation in Nevada in 2016. I calculate that 285 MW of solar panels can be placed on the roof of the Gigafactory and they will only generate 600 GWh per year, assuming a yearly average of 7.16 kWh/m2/day of solar radiation, 85% (1.3 million m2) of the roof will be covered, 20% efficiency in the panels and a 10% system loss.

Solar panels in dusty locations such as Nevada loose roughly 25% of their output if they are not regularly cleaned. Although robots have been developed to clean panels with brushes, water will most likely be used to clean the Gigafactory’s panels. A study by Sandia National Laboratory found that photovoltaic energy plants in Nevada consume 0.0520 acre-feet of water per MW of nameplate capacity per year. The solar panels at the Gigafactory will probably have 25% less area per MW than the solar panels in the Sandia study, so we can guesstimate that the solar panels on the Gigafactory roof will consume 11.1 acre-feet or 13,700 cubic meters of water per year.

Solar panels can also be placed on the ground around the factory, and but consider the fact that the Gigafactory will only receive 4.23 kWh/m2/day in December, compared to 9.81 kWh/m2/day in July. With less than half the energy from the panels during the winter, the Gigafactory will need other sources of energy during the times when it is cloudy and the sun’s rays are more indirect. Even during the summer, the Gigafactory will probably have to use temporary battery storage to smooth out the solar output or get additional energy with electric utilities which use gas peaking, battery storage or buy energy from the regional grid to give the Gigafactory a stable supply of electricity.

The original mockup of the Gigafactory showed wind turbines on the hillsides around the plant, but wind energy will not work onsite, because the area has such low wind speed. A weather station in the Truckee River valley along I-80, near the Gigafactory, measures an average wind speed of 3.3 m/s at a height of 6 meters, although the wind speed is probably higher at the site of the Gigafactory. Between 4 to 5 m/s is the minimum wind speed to start generating any energy, and between 5 and 6 m/s is generally considered the minimum for wind turbines to be economically viable. It might be possible to erect viable wind turbines onsite with 150 m towers to capture better wind, but the high costs make it likely that Tesla will forgo that option.

The region has good geothermal energy at depths of 4000 to 6000 feet and this energy is not variable like solar and wind. However, there is a great deal of risk in geothermal exploration which costs $10 million to drill a test well. It is more likely that Tesla will try to buy geothermal energy from nearby producers, but geothermal energy in the region is already in heavy demand, due to the clean energy mandates from California, so it won’t be cheap.

Despite Musk’s rhetoric about producing 100% of the Gigafactory’s energy onsite from renewable sources, Tesla knows that it is highly unrealistic, which is why it negotiated to get $8 million in electricity rebates from the state of Nevada over an 8 year period. It is possible that the Gigafactory will buy hydroelectric energy from Washington or Oregon, but California already competes for that electricity. If Tesla wants a diversified supply of renewable energy to balance out the variability of its solar panels, it will probably have to provide guaranteed returns for third parties to build new geothermal plants or wind farms in the region.

I would guesstimate that between 2/3 of the electricity consumed by the Gigafactory will come from the standard Nevada grid, whereas 1/3 will be generated onsite or be bought from clean sources. In 2016, utility-scale electricity generation in Nevada was 72.8% natural gas, 5.5% coal, 4.5% hydroelectric, 0.9% wind, 5.7% PV solar, 0.6% concentrated solar, 9.8% geothermal, 0.14% biomass and 0.03% petroleum coke. If we use the grams of CO2-eq per kWh estimated by IPCC AR5 WGIII and Bruckner et al (2014), then natural gas emits 595 g, coal emits 1027 g, petroleum emits 880 g, hydroelectric emits 24 g, terrestrial wind emits 11 g, utility PV solar emits 48 g, residential PV solar emits 41 g, concentrated solar emits 27 g, geothermal emits 38 g and biomass emits 230 g. Based on those emission rates, grid electricity in Nevada emits 499 g CO2-eq per kWh. If 2/3 comes from the grid and 1/3 comes from rooftop PV solar or a similar clean source, then the electricity used in the Gigafactory will emit 346 g CO2 per kWh. If consuming between 3,229 and 4,688 GWh per year, the Gigafactory will emit between 1.12 and 1.62 megatonnes of CO2-eq per year, which represents between 3.1% and 4.5% of the greenhouse gas emissions that the state of Nevada produced in 2014 according to the World Resources Institute.

Aside from the GHG emissions from the Gigafactory, it is necessary to consider the greenhouse gas emissions from mining, refining and processing the materials used in the Gigafactory. The materials used in batteries consume a tremendous amount of energy and resources to produce. The various estimates of the energy to produce the materials in batteries and their greenhouse gas emissions shows the high impact that battery manufacturing has on the planet.


To get some idea of how much materials will be used in the NCA cells produced by the Gigafactory, I attempted to do a rough calculation of the weight of materials in 1 kWh of cells. Taking the weight breakdown of an NMC battery cell in Olofsson and Romare (2013), I used the same weight percentages for the cathode, electrolyte, anode and packaging, but scaled the energy density up from 233 kW per kg in the NCA cells in 2014 to 263 kW per kg, which is a 13% increase, since Telsa claims a 10% to 15% increase in energy density in the Gigafactory’s cells. Then, I estimated the weight of the components in the cathode, using 76% nickel, 14% cobalt, and 10% aluminum and some stochiometry to calculate the lithium and oxygen compared to the rest of the cathode materials. The 2170 cells produced by the Gigafactory will probably have different weight ratios between their components, and they will have more packaging materials than the pouch cells studied by Olofsson and Romare, but this provides a basic idea how much material will be consumed in the Tesla cells.


The estimates of the energy, the emissions of carbon dioxide equivalent, sulfur dioxide equivalent, phosphorous equivalent and human toxicity to produce the metals are taken from Nuss and Eckelman (2014), which are process-sum estimates based on the EcoInvent database. These are estimates to produce generic metals, not the highly purified metals used in batteries, and the process-sum methodology generally underestimates the emissions, so the estimates should be taken with a grain of salt but they do give some idea about the relative impact of the different components in battery cells since they use the same methodology in their calculations.

At this point we still don’t know how large the battery will be in the forthcoming Model 3, but it has been estimated to have a capacity of 55 kWh based on a range of 215 miles for the base model and a 20% reduction in the size of the car compared to the Model S. At that battery size, the cells in the Model 3 will contain 6.3 kg of lithium, 26.4 kg of nickel, 4.9 kg of cobalt, 27.9 kg of aluminum, 56.6 kg of copper and 21.0 kg of graphite.

Even more concerning is the total impact of the Gigafactory when it ramps up to its planned capacity of 150 GWh per year. Originally, the Gigafactory was scheduled to produce 35 GWh of lithium ion batteries by 2020, plus package an additional 15 GWh of cells produced in other factories. After Tesla received 325,000 preorders for the Model 3 within a week of being announced on March 31, 2016, the company ambitiously announced that it would triple its planned battery production and be able to produce 500,000 cars a year by 2018–two years earlier than initially planned. Now Elon Musk is talking about building 2 to 4 additional Gigafactories and one is rumored to have signed a deal to build one of them in Shanghai.

If the components for 1 kWh of Gigafactory batteries is correct and the Nevada plant manages to produce as much as Musk predicts, then the Gigafactory and the cells it packages from other battery factories will consume 17,119 tonnes of lithium, 71,860 tonnes of nickel, 13,292 tonnes of cobalt, 154,468 tonnes of copper and 75,961 tonnes of aluminum. All of these metals except aluminum have limited global reserves, and North America doesn’t have enough production capacity to hope to supply all the demand of the Gigafactory, except in the case of aluminum and possibly copper.


When the Gigafactory was originally announced, Telsa made statements about sourcing the battery materials from North America which would both reduce its costs and lower the environmental impact of its batteries. These claims should be treated with skepticism. The Gigafactory will reduce the transportation emissions in battery manufacturing, since it will be shipping directly from the refineries and processors, but the transportation emissions will still be very high because North America simply doesn’t produce enough of the metals needed by the Gigafactory. If the Gigafactory manufacturers 150 GWh of batteries per year, then it will consume almost 200 times more lithium than North America produced in 2013. In addition, it will also consume 166% of the cobalt, 133% of the natural graphite, 25.7% of the nickel, and 5.6% of the copper produced by North American mines in 2016. Presumably synthetic graphite will be used instead of natural graphite because it has a higher purity level of carbon and more uniform spheroid flakes which allow for the easier flow of electrons in the cathode, but most synthetic graphite comes from Asia. Only in the case of aluminum does it seem likely that the metal will come entirely from North America, since Gigafactory will consume 1.9% of North American mine production and the US has excess aluminum refining capacity and no shortage of bauxite. Even when considering that roughly 45 GWh of the battery cells will come from external battery factories which are presumably located in Asia, the Gigafactory will overwhelm the lithium and cobalt markets in North America, and strain the local supplies of nickel and copper.


Shipping from overseas contributes to greenhouse gases, but shipping over water is very energy efficient. The Gigafactory is located at a nexus of railroad lines, so it can efficiently ship the battery materials coming from Asia through the port of Oakland. The bigger problem is that most ships on international waters use dirty bunker fuels that contain 2.7% sulfur on average, so they release large quantities of sulfur dioxide into the atmosphere that cause acid rain and respiratory diseases.

A larger concern than the emissions from shipping is the fact that the production of most of these battery materials is an energy intensive process that consumes between 100 and 200 mejajoules per kg. The aluminum, copper, nickel and cobalt produced by North America is likely to come from places powered by hydroelectric dams in Canada and natural gas in the US, so they are comparatively cleaner.  Most of the metal refining and graphite production in Asia and Australia, however, is done by burning coal. Most of the places that produce battery materials either lack strong pollution controls, as is the case in Russia, the Democratic Republic of Congo (DRC), Zambia, Philippines or New Caledonia, or they use dirty sources of energy, as is the case in China, India, Australia, the DRC, Zambia, Brazil and Madagascar.


Most of the world’s lithium traditionally came from pumping lithium rich subsurface water out of the salt flats of Tibet, northeast Chile, northwest Argentina and Nevada, but the places with concentrated lithium brines are rapidly being exhausted. The US Geological Survey estimates that China’s annual production of lithium which mostly comes from salt flats in Tibet has fallen from 4500 tonnes in 2012 to just 2000 tonnes in 2016. Silver Peak, Nevada, which is the only place in North America where lithium is currently extracted, may be experiencing similar production problems due to the exhaustion of its lithium, but its annual production numbers are confidential.

Since 1966 when brine extraction began in Silver Peak, the concentration of lithium in the water has fallen from 360 to 230 ppm (parts per million), and it is probably around 200 ppm today. At that concentration of lithium, 14,300 liters of water need to be extracted to produce 1 kg of battery-grade lithium metal. This subsurface water is critical in a state that only receives an average of 9 inches of rain per year. Parts of Nevada are already suffering from water rationing, so a massive expansion of lithium extraction is an added stress, but the biggest risk is that brine operations may contaminate the ground water. 30% of Nevada’s water is pumped from underground aquifers, so protecting this resource is vitally important. Lithium-rich water is passed through a series of 4 or 5 evaporation pools over a series of 12 to 18 months, where it is converted to lithium chloride, which is toxic to plants and aquatic life and can contaminate the ground water. Adams-Kszos and Stewart (2003) measured the effect of lithium chloride contamination in aquatic species 150 miles away from brine operations in Nevada.

As the lithium concentrations fall in the water, more energy is expended in pumping water and evaporating it to concentrate the lithium for processing. Argonne National Laboratory estimates that it takes 3 times as much energy to extract a tonne of lithium in Silver Peak, Nevada as in the Atacama Salt Flats of Chile, where the lithium is 7 times more concentrated.  Most of the lithium in Chile and Argentina is produced with electricity from diesel generators, but in China and Australia it comes from burning coal, which is even worse.

For every kg of battery-grade lithium, 4.4 kg of slaked lime is consumed to remove magnesium and calcium from the brine in Silver Peak. The process of producing this lime from limestone releases 0.713 kg of COfor every kg of lime. In addition, 5 kg of soda ash (Na2CO3) is added for each kilo of battery-grade lithium to precipitate it as lithium carbonate. Production of soda ash is also an energy intensive process which produces greenhouse gases.

Although lithium is an abundant element and can be found in ocean water and salty lakes, there are only 4 places on the planet where it is concentrated enough without contaminants to be economically extracted from the water and the few places with concentrated lithium water are rapidly being exploited. In 2008, Meridian International estimated that 2 decades of mining had extracted 20% of the lithium from the epicenter of the Atacama Salt Flats where lithium concentrations are above 3000 ppm. According to Meridian’s calculations, the world only had 4 million tonnes of high-concentration lithium brine reserves remaining in 2008.

As the best concentrations of lithium brine are being exhausted, extraction is increasingly moving to mining pegmatites, such as spodumene. North Carolina, Russia and Canada shut down their pegmatite operations because they couldn’t compete with the cheap cost of lithium from the salt flats of Chile and Argentine, but Australia and Zimbabwe have dramatically increased their production of lithium from pegmatites in recent years. Between 2004 and 2016, the percentage of global lithium from pegmatites increased from 39% to 44%.


In 2016, Australia produced 40.9% of the global lithium supply by processing spodumene, which is an extremely energy-intensive process. It takes 125 MJ of energy to extract a kilo of lithium from Chile’s salt flats, whereas 850 MJ is consumed to extract the same amount of lithium from spodumene in Australia. The spodumene is crushed, so it can be passed through a flotation beneficiation process to produce a concentrate. That concentrate is then heated to 1100ºC to change the crystal structure of the mineral. Then, the spodumene is ground and mixed with sulfuric acid and heated to 250ºC to form lithium sulfate. Water is added to dissolve the lithium sulfate and it is filtered before adding soda ash which causes it to precipitate as lithium carbonate. As lithium extraction increasingly moves to pegmatites and salt flats with lower lithium concentrations, the energy consumption will dramatically increase to produce lithium in the future.

Likewise, the energy to extract nickel and cobalt will also increase in future. The nickel and cobalt from Canada and the copper from the United States, generally comes from sulfide ores, which require much less energy to refine, but these sulfide reserves are limited. The majority of nickel and cobalt, and a sizable proportion of the copper used by the Gigafactory will likely come from places which present ethical challenges. Nickel from sulfide ores generally consumes less than 100 MJ of energy per kg, whereas nickel produced from laterite ores consumes between 252 and 572 MJ per kg. All the sulfide sources emit less than 10 kg of CO2 per kg of nickel, whereas the greenhouse gas emissions from laterite sources range from 25 to 46 kg  CO2 per kg of nickel. It is generally better to acquire metals from sulfide ores, since they emit fewer greenhouse gases and they generally come from deeper in the ground, whereas laterite ores generally are produced by open pit and strip mining which causes greater disruption of the local ecology. Between 2004 and 2016, the percentage of global primary production of nickel from laterite ores increase from 40% to 60% and that percentage will continue to grow in the future, since 72% of global nickel “resources” are laterites according to the US Geological Survey.


Cobalt is a byproduct of copper or nickel mining. The majority of the sulfide ores containing copper/cobalt are located in places like Norilsk, Russia, Zambia and the Katanga Province of the Democratic Republic of Congo, where there are no pollution controls to capture the large amounts of sulfur dioxide and heavy metals released by smelting. The refineries in Norilsk, Russia, which produce 11% of the world’s nickel and 5% of its cobalt, are so polluting, that nothing grows within a 20 kilometer radius of the refineries and it is reported that Norilsk has the highest rates of lung cancer in the world.

The Democratic Republic of Congo currently produces 54% of the world’s cobalt and 5% of its copper. Buying cobalt from the DRC helps fuel a civil war in the Katanga Province where the use of children soldiers and systematic rape are commonplace. Zambia, which is located right over the border from Katanga Province, produces 4% of the world’s cobalt and copper and it also has very lax pollution controls for metal refining.

Most of the cobalt and nickel produced by the DRC and Zambia is shipped to China for refining by burning coal. China has cracked down on sulfur dioxide and heavy metal emissions in recent years, and now the DRC is attempting to do more of the refining within its own borders. The problem is that the DRC produces most of its energy from hydroelectric dams in tropical rainforests, which is the dirtiest energy on the planet. According to the IPCC (AR5 WGIII 2014), hydroelectric dams typically emit a medium of 24 g of  CO2-eq per kWh, but tropical dams accumulate large amounts of vegetation which collect at the bottom of the dam where bacteria feeding on the decaying matter release methane (CH4) in the absence of oxygen. There have been no measurements of the methane released by dams in the DRC, but studies of 3 Amazonian hydroelectric dams found that they emit an average of 2556 g CO2-eq per kWh. Presumably the CO2 from these dams would have been emitted regardless of whether the vegetation falls on the forest floor or in a dam, but rainforest dams are unique environments without oxygen that produces methane. If we only count the methane emissions, then Amazonian hydroelectric dams emit an average of 2044 g CO2-eq per kWh. Any refining of copper/cobalt in the DRC and Zambia or nickel/cobalt in Brazil will likely use this type of energy which emits twice as much greenhouse gases as coal.

To avoid the ethical problems with obtaining nickel and cobalt from Russia and cobalt and copper from the DRC and Zambia, the Gigafactory will have to consume metals from laterite ores in places like Cuba, New Caledonia, Philippines, Indonesia and Madagascar, which dramatically increases the greenhouse gas emissions of these metals. The nickel/cobalt ore from Moa, Cuba is shipped to Sherritts’ refineries in Canada, so presumably it will be produced with pollution controls in Cuba and Canada and relatively clean sources of energy. In contrast, the nickel/cobalt mining in the Philippines and New Caledonia has generated protracted protests by the local population who are effected by the contamination of their water, soil and air. When Vale’s $6 billion high pressure acid leaching plant in Goro, New Caledonia leaked 100,000 liters of acid-tainted effluent leaked into a local river in May 2014, protesters frustrated by the unaccountability of the mining giant burned a third of its trucks and one of its buildings, causing between $20 and $30 million in damages. The mining companies extracting nickel and cobalt in the Philippines have shown so little regard for the health of the local people, that the public outcry induced the Duterte administration to recently announce that it will prohibit all open pit mining of nickel. If this pronouncement is enforced, the operations of 28 of the 41 companies mining nickel/cobalt in the country will be shut down and the global supply of nickel will be reduced between 8% and 10%.

Most refining of laterite ores in the world is done with dirty energy, which is problematic because these ores require so much more energy than sulfide ores. Much of the copper/cobalt from the DRC and Zambia and the nickel/cobalt from the Philippines is shipped to China where it is refined with coal. The largest nickel/cobalt laterite mine and refinery in the world is the Ambatovy Project in Madagascar. Although the majority of the electricity on the island comes from hydroelectric dams, the supply is so limited that Ambatovy constructed three 30 MW coal-powered generators, plus 30 MW diesel powered generators.

It is highly likely that many of the LCA studies of lithium-ion batteries have underestimated the energy and greenhouse gas emissions to produce their metals, because they assume that the lithium comes from brine operations and the copper, nickel and cobalt come from sulfide ores with high metal concentrations. As lithium extraction increasingly shifts to spodumene mining and nickel and cobalt mining shifts to laterite ores, the greenhouse gas emissions to produce these metals will dramatically increase.

As the global production of lithium-ion batteries ramps up, the most concentrated ores for these metals will become exhausted, so that mining will move to less-concentrated sources, which require more energy and resources in the extraction and processing.  In 1910, copper ore in the US contained 1.9% copper. By 1950, this percentage had fallen to 0.9% copper, and by 1980 it was at 0.5% copper. As the concentration of copper in the ore has fallen, the environmental impact of extraction has risen. In a study of the smelting and refining of copper and nickel, Norgate and Rankin (2000) found that the energy consumption, greenhouse gas emissions and sulfur dioxide emissions per kg of metal rose gradually when changing from ore with 3% or 2% metal to 1% metal, but below 1% the environmental impacts increased dramatically. MJ/kg, CO2/kg and SO2/kg doubled when moving from ore with 1% metal to ore with 0.5% metal, and they doubled again when moving to 0.25% metal. Producing a kilo of copper today in the US has double the environmental impact of a kg of copper half a century ago and it will probably have 4 times the impact in the future.

The enormous demand for metals by battery manufacturers will force the mining companies to switch to less and less concentrated ores and consume more energy in their extraction. If the Nevada Gigafactory produces 150 GWh of batteries per year, then it will dramatically reduce the current global reserves listed by the US Geological survey. The Nevada Gigafatory will cut the current global lithium reserves from 400 to 270 years, assuming that current global consumption in other sectors does not change (which is highly unlikely). If the Gigafactory consumes metals whose recycled content is the US average recycling rate, then the current global copper reserves will be reduced from 37.1 to 36.9 years, the nickel reserves from 34.7 to 33.9 years, and the cobalt reserves from 56.9 to 52.5 years.

Recycling at the Gigafactory will not dramatically reduce its demand for metals. If we assume that 80% of the metal consumed by the Gigafactory will come from recycled content starting in 15 years when batteries start to be returned for recycling, then current global reserves will be extended 0.04 years for copper, 0.09 years for nickel, 0.9 years for cobalt. Only in the case of lithium will recycling make a dramatic difference, extending the current reserves 82 years for lithium.

The prospects for global shortages of these metals will become even more dire if the 95.0 million vehicles that the world produced in 2016 were all long-range electrics as Elon Musk advocates for “sustainable transport.” If the average vehicle (including all trucks and buses) has a 50 kWh battery, then the world would need to produce 4750 GWh of batteries per year just for electric vehicles. With energy storage for the electrical grid, that total will probably double, so 64 Gigafactories will be needed. Even that might not enough. In Leonardo de Caprio’s documentary Before the Flood, Elon Musk states, “We actually did the calculations to figure out what it would take to transition the whole world to sustainable energy… and you’d need 100 Gigafactories.”

Lithium-ion batteries will get more energy dense in the future, but they are unlikely to reach the high energy density of the NCA cells produced in the Gigafactory, if using the LMO or LFP chemistries. For that kind of energy density, they will probably need either an NCA or an altered NMC chemistry which is 70%-80% nickel, so the proportion of lithium, nickel, cobalt and copper in most future EV batteries is likely to be similar to the Gigafactory’s NCA cells. If 4750 GWh of these batteries are produced every year at an energy density of 263 Wh/kg, then the current global reserves will be used up in 24.5 years for lithium, 31.2 years for copper, 20.2 years for nickel, and 15.4 years for cobalt. Even if those batteries are produced with 80% recycled metals, starting in 15 years time, the current global lithium reserves would be extended 6.6 years, or 7.4 years if all sectors switch to using 80% recycled lithium. Using 80% recycled metal in the batteries would extend current copper, nickel and cobalt reserves by 0.7, 0.5 and 0.1 years, respectively. An 80% recycling rate in all sectors would make a difference for copper, extending its reserves by 11.5 years, but only 2.8 years for nickel and 0.2 years for cobalt. In other words, recycling will not significantly reduce the enormous stresses that lithium-ion batteries will place on global metal supplies, because they represent so much new demand for metals.

As the demand for these metals increases, the prices will increase and new sources of these metals will be found, but they will either be in places like the DRC with ethical challenges or in places with lower quality ores which require more energy and resources to extract and refine. We can expect more energy-intensive mining of spodumene and  more strip mining of laterite ores which cause more ecological disruption. The ocean floor has enormous quantities of manganese, nickel, copper and cobalt, but the energy and resources to scrap the bottom of the ocean will dramatically increase the economic and ecological costs. If battery manufacturing dramatically raises the prices of lithium, nickel, cobalt, copper (and manganese for NMC cells), then it will be doubly difficult to transition to a sustainable civilization in other areas. For example, nickel and cobalt are essential to making carbide blades, tool dies and high-temperature turbine blades and copper is a vital for wiring, electronics and electrical motors. It is hard to imagine how the whole world will transition to a low-carbon economy if these metals are made prohibitively expensive by manufacturing over a billion lithium-ion batteries for EVs.

Future batteries will probably be able to halve their weight by switching to a solid electrolyte and using an anode made of lithium metal, lithiated silicon or carbon nanotubes (graphene), but that will only eliminate the copper, while doing little to reduce the demand for the other metals. Switching the anode to spongy silicon or graphene will allow batteries to hold more charge per kilogram, but those materials also dramatically increase the cost and the energy and resources that are consumed in battery manufacturing.

In the near future, lithium-ion batteries are likely to continue to follow their historical trend of using 7% less materials each year to hold the same amount of charge. That rate of improvement, however, is unlikely to last. An NCA cathode currently holds a maximum of 200 mAh of energy per gram, but its theoretical maximum is 279 mAh/g. It has already achieved 72% of what is theoretically possible, so there is little scope to keep improving. NMC at 170 mAh/g is currently farther from its theoretical limit of 280 mAh/g, but the rate of improvement is likely to slow as these battery chemistries bump against their theoretical limits.

Clearly the planet doesn’t have the resources to build 95 million long-range electric vehicles each year that run on lithium-ion batteries. Possibly a new type of battery will be invented that only uses common materials, such as aluminum, zinc, sodium and sulfur, but all the batteries that have been conceived with these sorts of material still have significant drawbacks. Maybe a new type of battery will be invented that is suitable for vehicles or the membranes in fuel cells will become cheap enough to make hydrogen a viable competitor, but at this point, lithium-ion batteries appear likely to dominate electric vehicles for the foreseeable future. The only way EVs based on lithium-ion can become a sustainable solution for transport is if the world learns to live with far fewer vehicles.

Currently 3% more vehicles are being built each year, and there is huge demand for vehicles in the developing world. While demand for cars has plateaued in the developed world, vehicle manufacturing since 1999 has grown 17.4% and 10.5% per year in China and India, respectively. If the developing world follows the unsustainable model of vehicle ownership found in the developed world, then the transition to electrified transport will cause severe metal shortages. Based on current trends, Navigant Research predicts that 129.9 million vehicles will be built in the year 2035, when there will be 2 billion vehicles on the road.


On the other hand, James Arbib and Tony Seba believe that autonomous vehicles and Transport as a Service (TaaS) such as Uber and Lyft will dramatically reduce demand for vehicles, lowering the number of passenger vehicles on American roads from 247 to 44 million by 2030. If 95% of passenger miles are autonomous TaaS by 2030 and the lifespan of electric vehicles grows to 500,000 miles as Arbib and Seba predict, then far fewer vehicles will be needed. Manufacturing fewer electric vehicles reduces the pressure to extract metals from laterite ores, pegmatites, the ocean floor, and lower-grade ores in general with higher ecological costs.

Ellingsen et al (2016) estimate that the energy consumed by battery factories per kWh of batteries has halved since 2012, however, that has to be balanced by the growing use lithium from spodumene and nickel and cobalt from laterite ores, and ores with lower metal concentrations that require more energy and produce more pollution. Given the increased energy efficiency in battery manufacturing plants and the growing efficiencies of scale, I would guesstimate that lithium-ion battery emissions are currently at roughly 150 kg  CO2-eq per kWh of battery and that the Gigafactory will lower those emissions by a third to roughly 100 kg  CO2-eq / kWh. If the Model 3, uses a 55 kWh battery, then its battery emissions would be roughly 5500 kg  CO2-eq.

Manufacturing a medium-sized EV without the battery emits 6.5 tonnes of  CO2-eq according to Ellingsen et al (2016). Electric cars don’t have the huge engine block of an ICE car, but they have large amounts of copper in the motor’s rotor and the windings and the Model 3 will have far more electronics than a standard EV. The Model S has 23 kg of electronics and I would guesstimate that the Model 3 will have roughly 15 lbs of electronics if it contains nVidia’s Drive PX or a custom processor based on the K-1 graphics processor. If the GHG emissions are roughly 150 kg  CO2-eq per kg of electronics, we can guesstimate that 2.2 tonnes of  CO2-eq will be emitted to manufacture the electronics in the Model 3. Given the large amount of copper, electronics and sensors in the Model 3, add an additional tonne, plus 5.5 tonnes for its 50 kWh battery, so a total of 13 tonnes of  CO2-eq will be emitted to manufacture the entire car.

Manufacturing a medium-sized ICE car emits between 5 and 6 tonnes, so there is roughly a 7.5 tonne difference in GHG emissions between manufacturing the Model 3 and a comparable ICE car. A new ICE car the size of the Model 3 will get roughly 30 mpg. In the US, a gallon of gasoline emits 19.64 lbs of CO2, but it emits 24.3 lbs of  CO2e when the methane and nitrous oxide are included, plus the emissions from extraction, refining and transportation, according to the Argonne National Laboratory. Therefore, we will need to burn 680 gallons of gasoline or drive 20,413 miles at 30 mpg to equal those 7.5 extra tonnes in manufacturing the Model 3.

At this point, the decision whether the Model 3 makes ecological sense depends on where the electricity is coming from. Let’s assume that the Model 3 will consume 0.30 kWh of electricity per mile, which is what the EPA estimates the Nissan Leaf to consume. The Model S will be a smaller and more aerodynamic car than the Leaf, but it will also weigh significantly more due to its larger battery. If we also include the US national average of 4.7% transmission losses in the grid, then the Model 3 will consume 0.315 kWh per mile. After driving the Model 3 100,000 miles, the total greenhouse gas emissions (including the production emissions) will range between 14.1 and 45.3 tonnes, depending on its energy source to charge the battery.


In comparison, driving a 30 mpg ICE car (with 5.5 tonnes in production emissions) will emit 42.2 tonnes of  CO2-eq after 100,000 miles. If we guesstimate that manufacturing a Toyota Prius will emit 7 tonnes, then driving it 100,000 miles at 52 mpg will emit 28.2 tonnes. Only in places like Kentucky which get almost all their electricity from coal is an ICE car the better environmental choice. The Model 3, however, will have worse emissions than most of its competitors in the green car market, if it is running on average US electricity, which emits 528 grams of CO2-eq per kWh. It will emit slightly more than a plugin hybrid like the Chevy Volt and an efficient hybrid like the Toyota Prius and substantially more than a short-range electric, like the Nissan Leaf.

Most previous comparisons between electric cars and ICE cars were based on short-range electrics with smaller batteries, such as the Nissan Leaf, which is why environmental advocates are so enthusiastic about EVs. However, comparing the Model S and Model 3 to the Nissan Leaf, Chevy Volt and Toyota Prius hybrid shows that the environmental benefits of long-range EVs are questionable when compared to short-range EVs, plugin hybrids and hybrids. Only when running the Model 3 on cleaner sources of electricity does it emit less greenhouse gases than hybrids and plugin hybrids, but in the majority of the United States it will emit slightly more. Many of the early adopters of EVs also owned solar panels, so buying a Model 3 will reduce their carbon footprint, but the proportion of EV owners with solar panels on their roofs is falling. According to CleanTechnica’s PlugInsights annual survey, 25% of EV buyers before 2012 had solar panels on their roofs, compared to just 12% in 2014-2015. Most people who own solar panels do not have a home battery system so they can not use their clean energy all day, and most EV charging will happen at night using dirtier grid electricity.

Another factor to consider is the effect of methane leakage in the extraction and transport of natural gas. There is a raging scientific debate about what percentage of natural gas leaks into the atmosphere without being burned. A number of studies have concluded that the leakage of methane causes electricity from natural gas to have GHG emissions similar to coal, but there is still no consensus on the matter.  If the leakage rate is as high as some researchers believe, then EVs will emit more greenhouse gases than hybrids and efficient ICE cars in places like California which burn large amounts of natural gas.

On the other hand, many people believe that EVs will last 300,000 miles or even 500,000 miles since they have so few moving parts, so their high emissions in manufacturing will be justified. However, the EV battery will probably have to be replaced, and the manufacturing emissions for a long range EV battery can be as high as building a whole new ICE car. Another factor that could inhibit the long life of Telsa’s cars is the fact that the company builds cars described as “computers on wheels,” which are extremely difficult for third parties to fix and upgrade over time. Telsa only sells its parts to authorized repair shops and much of the functionality of car is locked up with proprietary code and secret security measures, as many do-it-yourselfers have discovered to their chagrin. When Tesla cars are damaged and sold as salvage, Tesla remotely disables its cars, so that they will no longer work even if repaired. The $600 inspection fee to reactivate the car plus the towing fees discourage Teslas from being fixed by third parties. These policies make it less likely that old Teslas will be fixed and their lifespans extended to counterbalance the high environmental costs of producing the cars.

Although the Model 3 has high greenhouse gas emissions in its production and driving it is also problematic in parts of the world that currently use dirty energy, those emissions could be significantly reduced in the future if they are accompanied by a shift to renewable energy, more recycling and the electrification of mining equipment, refining and transport. The car’s ecological benefits will increase if the emissions can be decreased in producing battery materials and the greater energy density of batteries is used to decrease the total materials in batteries rather than keep extending the range of EVs. Producing millions of Model 3s will strain the supply of vital metals and shift extraction to reserves which have higher ecological costs. However, the Model 3 could become a more sustainable option if millions of them are deployed in autonomous Transport as a Service fleets, which Arbib and Seba predict will be widespread by 2030, since TaaS will cost a tenth of the price of owning a private vehicle. If the Model 3 and future autonomous EVs become a means to drop the global demand for private vehicles and that helps reduce the demand for lithium, nickel, cobalt and copper down to sustainable levels, then the high environmental costs of manufacturing the Model 3 would be justified.

Nonetheless, the Model 3 and the NCA 2170 batteries currently being produced by Tesla offer few of those possible future ecological benefits. Most of the metal and graphite in the battery is being produced with energy from fossil fuels. In the short term at least, Telsa batteries will keep growing in capacity to offer more range, rather than reducing the total consumption of metals per battery. The extra sensors, processing power and electronics in the current Model 3 will increase its ecological costs without providing the Level 4 or 5 autonomy that would make it possible to convince people to give up their private vehicles. In the here and now, the Model 3 is generally not the best ecological choice, but it might become a better choice in the future.

The Model 3 promises to transform the market not only for EVs, but cars in general. If the unprecedented 500,000 pre-orders for the Model 3 are any indication of future demand, then long-range electrics with some degree of autonomous driving like the Model 3 will capture most of the EV market. Telsa’s stunning success will induce the rest of auto-makers to also start making long-range EVs with large batteries, advanced sensors, powerful image processors, advanced AI, cellular networking, driving data collection and large multimedia touchscreens. These features will dramatically increase the environmental costs of car manufacturing. Whether these features will be balanced by other factors which reduce their environmental costs remains to be seen.

Much of this analysis is guess work, so it should be taken with a grain of salt, but it points out the problems with automatically assuming that EVs are always better for the environment. If we consider sulfate emissions, EVs are significantly worse for the environment. Also, when we consider the depletion of critical metal reserves, EVs are significantly worse than ICE vehicles.

The conclusion should be that switching to long-range EVs with large batteries and advanced electronics bears significant environmental challenges. The high manufacturing emissions of these types of EVs make their ecological benefits questionable for private vehicles which are only used on average 4% of the time. However, they are a very good option for vehicles which are used a higher percentage of the time such as taxis, buses and heavy trucks, because they will be driven many miles to counterbalance their high manufacturing emissions. Companies such as BYD and Proterra provide a model of the kinds of electric vehicles that Tesla should be designing to promote “sustainable transport.” Tesla has a few ideas on the drawing board that are promising from an ecological perspective, such as its long-haul semi, the renting out of Teslas to an autonomous TaaS fleet, and a new vehicle that sounds like a crossover between a sedan and a minibus for public transport. The current Model 3, however, is still a vehicle which promotes private vehicle ownership and bears the high ecological costs of long-range lithium batteries and contributes to the growing shortage of critical metals.

Clearly, EVs alone are not enough to reduce greenhouse gas emissions or attain sustainable transport in general. The first step is to work on switching the electric grid to cleaner renewable energy and installing more residential solar, so that driving an EV emits less CO2. However, another important step is redesigning cities and changing policies so that people aren’t induced to drive so many private vehicles. Instead of millions of private vehicles on the road, we should be aiming for walkable cities and millions of bikes and electric buses, which are far better not only for human health, but also for the environment.

A further step where future Model 3s may help is in providing autonomous TaaS that helps convince people to give up their private vehicles. However, autonomous EVs need to be matched by public policies that disincentivize the kind of needless driving that will likely occur in the future. The total number of miles will likely increase in the future due to autonomous electric cars driving around looking for passengers to pick up and people who spend more time in the car because they can surf the web, watch movies, and enjoy the scenery without doing the steering. Plus, the cost of the electricity to charge the battery is so cheap compared to burning gasoline that people will be induced to drive more, not less.


The green car myth

28 06 2017

How government subsidies make the white elephant on your driveway look sustainable

And this comes on top of this article that describes how just making electric cars’ battery packs is equivalent to eight years worth of driving conventional happy motoring.

I have written before about the problems with bright green environmentalism. Bright greens suggest that various technological innovations will serve to reduce carbon dioxide emissions enough to avoid catastrophic global warming and other environmental problems. There are a variety of practical problems that I outlined there, including the fact that most of our economic activities are hitting physical limits to energy efficiency.

The solution lies in accepting that we can not continue to expand our economies indefinitely, without catastrophic consequences. In fact, catastrophic consequences are in all likelihood already unavoidable, if we believe the warnings of prominent climatologists who claim that a two degree temperature increase is sufficient to cause significant global problems.

It’s easy to be deceived however and assume that we are in the process of a transition towards sustainable green technologies. The problem with most green technologies is that although their implementation on a limited scale is affordable, they have insufficient scalability to enable a transition away from fossil fuels.

Part of the reason for this limited scalability is because users of “green” technology receive subsidies and do not pay certain costs which users of “grey” technology have to shoulder as a result. As an example, the Netherlands, Norway and many other nations waive a variety of taxes for green cars, taxes that are used to maintain the network of roads that these cars use. As the share of green cars rises, grey cars will be forced to shoulder increasingly higher costs to pay for the maintenance of road networks.

It’s inevitable that these subsidies will be phased out. The idea of course is that after providing an initial gentle push, the transition towards more green driving will have reached critical mass and prove itself sustainable without any further government subsidies. Unfortunately, that’s unlikely to occur. We’ve seen a case study of what happens when subsidies for green technologies are phased out in Germany. After 2011, the exponential growth in solar capacity rapidly came to a stop, as new installs started to drop. By 2014, solar capacity in Germany had effectively stabilized.1 Peak capacity of solar is now impressively high, but the amount of solar energy produced varies significantly from day to day. On bad days, solar and wind hardly contribute anything to the electricity grid.

Which brings us to the subject of today’s essay: The green car. The green car has managed to hide its enormous price tag behind a variety of subsidies, dodged taxes and externalities it has imposed upon the rest of society. Let us start with the externalities. Plug-in cars put significant strain on the electrical grid. These are costs that owners of such cars don’t pay themselves. Rather, power companies become forced to make costs to improve their grid, to avoid the risk of blackouts, costs that are then passed on to all of us.

When it comes to the subsidies that companies receive to develop green cars, it’s important not just to look at the companies that are around today. This is what is called survivorship bias. We focus on people who have succeeded and decide that their actions were a good decision to take. Everyone knows about the man who became a billionare by developing Minecraft. As a result, there are droves of indie developers out there hoping to produce the next big game. In reality, most of them earn less than $500 a year from sales.2

Everyone has heard of Tesla or of Toyota’s Prius. Nobody hears of the manufacturers who failed and went bankrupt. They had to make costs too, costs that were often passed on to investors or to governments. Who remembers Vehicle Production Group, or Fisker automotive? These are companies that were handed 193 million and 50 million dollar in loans respectively by the US Federal government, money the government won’t see again because the companies went bankrupt.3 This brings the total of surviving car manufacturers who received loans from the government to three.

To make matters worse, we don’t just subsidize green car manufacturers. We subsidize just about the entire production chain that ultimately leads to a green car on your driveway. Part of the reason Fisker automotive got in trouble was because its battery manufacturer, A123 Systems, declared bankruptcy. A123 Systems went bankrupt in 2012, but not before raising 380 million dollar from investors in 2009 and receiving a 249 million dollar grant from the U. S. department of energy back in 2010.

Which brings us to a de facto subsidy that affects not just green cars, but other unsustainable projects as well: Central bank policies. When interest rates are low, investors have to start searching for yield. They tend to find themselves investing in risky ventures, that may or may not pay off. Examples are the many shale companies that are on the edge of bankruptcy today. This could have been anticipated, but the current financial climate leaves investors with little choice but to invest in such risky ventures. This doesn’t just enable the growth of a phenomenon like the shale oil industry affects green car companies as well. Would investors have poured their money into A123 Systems, if it weren’t for central bank policies? Many might have looked at safer alternatives.

One company that has benefited enormously from these policies is Tesla. In 2008, Tesla applied for a 465 million dollar loan from the Federal government. This allowed Tesla to produce its car, which then allows Tesla to raise 226 million in an IPO in June 2010, where Tesla receives cash from investors willing to invest in risky ventures as a result of central bank policies. A $7,500 tax credit then encourages sales of Tesla’s Model S, which in combination with the money raised from the IPO allows Tesla to pay off its loan early.

In 2013, Tesla then announces that it has made an 11 million dollar profit. Stock prices go through the roof, as apparently they have succeeded at the task of the daunting task of making green cars economically viable. In reality, Tesla made 68 million dollar that year selling its emission credits to other car companies, without which, Tesla would have made a loss.

Tesla in fact receives $35,000 dollar in clean air credits for every Model S that it sells to customers, which in total was estimated to amount to 250 million dollar in 2013.4 To put these numbers in perspective, buying a Model S can cost anywhere around $70,000, so if the 35,000 dollar cost was passed on to the customer, prices would rise by about 50%, not including whatever sales tax applies when purchasing a car.

We can add to all of this the 1.2 billion of subsidy in the form of tax exemptions and reduced electricity rates that Tesla receives for its battery factory in Nevada.5 The story gets even better when we arrive at green cars sold to Europe, where we find the practice of “subsidy stacking”. The Netherlands exempts green cars from a variety of taxes normally paid upon purchase. These cars are then exported to countries like Norway, where green cars don’t have to pay toll and are allowed to drive on bus lanes.6

For freelancers in the Netherlands, subsidies for electrical cars have reached an extraordinarily high level. Without the various subsidies the Dutch government created to increase the incentive to drive an electrical car, a Tesla S would cost 94.010 Euro. This is a figure that would be even higher of course, if Dutch consumers had to pay for the various subsidies that Tesla receives in the United States. After the various subsidies provided by the Dutch government for freelance workers, Dutch consumers can acquire a Tesla S at a price of just 25,059 Euro.7

The various subsidies our governments provide are subsidies we all end up paying for in one form or another. What’s clear from all these numbers however is that an electric car is currently nowhere near a state where it could compete with a gasoline powered car in a free unregulated market, on the basis of its own merit.

The image that emerges here is not one of a technology that receives a gentle nudge to help it replace the outdated but culturally entrenched technology we currently use, but rather, of a number of private companies that compete for a variety of subsidies handed out by governments who seek to plan in advance how future technology will have to look, willfully ignorant of whatever effect physical limits might have on determining which technologies are economically viable to sustain and which aren’t.

After all, if government were willing to throw enough subsidies at it, we could see NGO’s attempt to solve world hunger using caviar and truffles. It wouldn’t be sustainable in the long run, but in the short term, it would prove to be a viable solution to hunger for a significant minority of the world’s poorest. There are no physical laws that render such a solution impossible on a small scale, rather, there are economic laws related to scalability that render it impossible.

Similarly, inventing an electrical car was never the problem. In 1900, 38% of American cars ran on electricity. The reason the electrical car died out back then was because it could not compete with gasoline. Today the problem consists of how to render it economically viable and able to replace our fossil fuel based transportation system, without detrimentally affecting our standard of living.

This brings us to the other elephant, the one in our room rather than our driveway. The real problem here is that we wish to sustain a standard of living that was built with cheap natural resources that are no longer here today. Coping with looming oil shortages will mean having to take a step back. The era where every middle class family could afford to have a car is over. Governments would be better off investing in public transport and safe bicycle lanes.

The problem America faces however, is that there are cultural factors that prohibit such a transition. Ownership of a car is seen as a marker of adulthood and the type of car tells us something about a man’s social status. This is an image car manufacturers are of course all too happy to reinforce through advertising. Hence, we find a tragic example of a society that wastes its remaining resources on false solutions to the crisis it faces.

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How “Green” is Lithium?

17 04 2016

Originally published on the KITCO website in 2014….. interesting how this makes no mention of NiFe batteries, they are simply ‘under the radar’……


The market for battery electric and hybrid vehicles is growing slowly but steadily – from 0.4% in 2012 to 0.6% in 2013 and 0.7% in 2014 (year-to-date) in the United States alone.

Consumers buy these vehicles despite lower gas prices out of a growing conscience and concern for the environment. With this strong attraction to alternative energy, grows the demand for lithium, which is predominantly mined and imported from countries like Bolivia, Chile, China and Argentina.

Within the U.S., only Nevada, future home of Tesla’s new “Gigafactory” for batteries, produces lithium. However, the overall ecological impact of lithium ion batteries remains somewhat unclear, as does the “well-to-wheel” effort and cost to recharge such batteries.

To fully grasp the relevance and environmental impact of lithium it is important to note that lithium ion batteries are also found in most mobile phones, laptop computers, wearable electronics and almost anything else powered by rechargeable batteries.

Dozens of reports are available on the ecological impact of lithium mining. Unfortunately, many of them are influenced by the perspective of the organizations or authors releasing them. Reducing the available information to studies carried out by government bodies and research institutes around the world, a picture emerges nonetheless:

  • Elemental lithium is flammable and very reactive. In nature, lithium occurs in compounded forms such as lithium carbonate requiring chemical processing to be made usable.
  • Lithium is typically found in salt flats in areas where water is scarce. The mining process of lithium uses large amounts of water. Therefore, on top of water contamination as a result of its use, depletion or transportation costs are issues to be dealt with. Depletion results in less available water for local populations, flora and fauna.
  • Toxic chemicals are used for leaching purposes, chemicals requiring waste treatment. There are widespread concerns of improper handling and spills, like in other mining operations around the world.
  • The recovery rate of lithium ion batteries, even in first world countries, is in the single digit percent range. Most batteries end up in landfill.
  • In a 2013 report, the U.S. Environmental Protection Agency (EPA) points out that nickel and cobalt, both also used in the production of lithium ion batteries, represent significant additional environmental risks.

A 2012 study titled “Science for Environment Policy” published by the European Union compares lithium ion batteries to other types of batteries available (lead-acid, nickel-cadmium, nickel-metal-hydride and sodium sulphur). It concludes that lithium ion batteries have the largest impact on metal depletion, suggesting that recycling is complicated. Lithium ion batteries are also, together with nickel-metal-hydride batteries, the most energy consuming technologies using the equivalent of 1.6kg of oil per kg of battery produced. They also ranked the worst in greenhouse gas emissions with up to 12.5kg of CO2 equivalent emitted per kg of battery. The authors do point out that “…for a full understanding of life cycle impacts, further aspects of battery use need to be considered, such as length of usage, performance at different temperatures, and ability to discharge quickly.”

Technology will of course improve, lithium supplies will be sufficient for the foreseeable future, and recycling rates will climb. Other issues like the migration of aging cars and electronic devices to countries with less developed infrastructures will, however, remain. As will the reality of lithium mining and processing. It is therefore conceivable that new battery technologies (sea water batteries or the nano-flowcell, for instance) will gain more importance in years to come, as will hydrogen fuel cells.

We will report about the pros and cons of each of these alternatives in future issues of Tech Metals Insider.

Bodo Albrecht,

Energy storage for the Tasmanian Project

3 02 2016

I’ve done it.  I’ve ordered my Nickel Iron batteries and Victron charger/inverter. Once I’ve ironcoreascertained whether or not I can afford it, I will purchase a second Victron for future backup, fingers crossed the economy (and our funds!) hold out long enough.  The batteries, a 48V 200Ah bank, won’t get here from Russia for another six or so weeks, and when they do, I’ll post more about the installation.


Victron inverter/charger

What really got me started re posting this was the extraordinary episode of Catalyst aired on ABC TV last night….

Anyone watching this will have been totally taken over by techno utopianism of the highest quality.  Dr Jonica Newby is a veterinarian, and unfortunately doesn’t seem to know the difference between power and energy, but maybe I’m just splitting hairs….. it was nonetheless frustrating to constantly hear battery banks rated in kW rather than kWh, big difference….

The “we’ll be saved by these batteries” gushing coming from everyone’s mouths in this show was only interrupted for a few seconds when one commentator expressed his doubt over the financial viability of the very first Tesla power wall installed in Australia.  He asked how this was remotely viable when the payback was 23 years, and the equipment was only warranted for 10? Which was swiftly glossed over for the remaining 25 minutes and never mentioned again…..

Worse, the evangelical fervour used to extol the virtues of Lithium Ion batteries, a technology that I am certain will disappoint a lot of owners in the future, bordered on religion……  think back to how long batteries in your laptops and cell phones last, and wonder how long before all that stuff ends up on landfill.

From Computer World:

Dell plans to recycle however many of the 4.1 million recalled batteries that customers turn in (see Dell battery recall not likely to have big environmental impact), but what happens to the other 2 billion lithium ion batteries which will be sold this year? Most will last for 300 to 500 full recharges (one to three years of use) before failing and ending up in your local municipal landfill or incinerator.

Europeans have a dimmer view of landfilling lithium ion batteries. “There is always potential contamination to water because they contain metals,” says Daniel Cheret, general manager at Belgium-based Umicore Recycling Solutions. The bigger issue is a moral one: the products have a recycling value, so throwing away 2 billion batteries a year is just plain wasteful – especially when so many American landfills are running out of space. “It’s a pity to landfill this material that you could recover,” Charet says. He estimates that between 8,000 and 9,000 tons of cobalt is used in the manufacture of lithium ion batteries each year. Each battery contains 10 to 13% cobalt by weight. Umicore recyles all four metals used in lithium ion batteries.

The reason why more lithium ion batteries aren’t recycled boils down to simple economics: the scrap value of batteries doesn’t amount to much – perhaps $100 per ton, Cheret says. In contrast, the cost of collecting, sorting and shipping used batteries to a recycler exceeds the scrap value, so batteries tend to be thrown away. Unfortunately, the market does not factor in the social cost of disposal, nor does it factor in the fact that recycling metals such as cobalt has a much lower economic and environmental cost than mining raw materials. So we throw them away by the millions.

To be fair, Professor Thomas Maschmeyer also introduced zinc bromide battery technology to the show, and it sounds impressive, with very fast charging times, which by the way is irrelevant to home battery charging. Amusingly, our veterinarian presenter had never heard of gel cells and looked mightily impressed with that too.  It’s easy to be impressed with technology you’re not familiar with, or don’t understand I guess….. and a timeline of 10 or 20 years was mentioned, as if we actually have 10 or 20 years to solve our climate and energy predicaments.

As was to be expected, the main theme of the show was all about how much money could be made from this, not how it was going to save us from climate change or anything else important.  I could not stop laughing when, poised over a computer monitor, Josh Byrne of Gardening Australia fame makes five cents from exporting battery power to his electricity supplier…… what a waste of batteries. How anyone can think that shortening the life of one’s battery bank for five cents is worthwhile truly staggers me. Especially when the service provider then sells it to his neighbours for four times that much!

To his credit, I hasten to add, Josh Byrne has built a 10 star energy efficient house which, powered by just 3kW (when just about everyone these days installs five…) appears to be managing almost as well as we used to in Queensland. I think a program devoted to this aspect of his energy management would be far more useful than the one being discussed at the moment…

Josh House 3D render

Josh’s house project

There was, as usual, much talk about how we could go fossil fuel free, without any acknowledgement whatsoever that all the stuff that goes into these magic boxes of tricks have to be mined, refined, shipped, manufactured, and installed, using….. fossil fuels of course!!  Nor was there any mention of where the money to make all this stuff would come from.

Fascinatingly, the ‘big three’ electricity suppliers in Australia are getting in on the act. Why they would do this when they are constantly expressing their anti renewables positions is puzzling.  Could it be more ‘we’re greener than thou’?

I remain totally baffled by this race to the bottom.


I have just been pointed to this paper written by Peter J. DeMar, Battery Research and Testing, Inc. Oswego, NY, USA

They actually managed to revive 85+ year old NiFe batteries to close to their original capacity, even though most of them had been abused beyond belief….. they’re going to keep them going for another fifteen years, just to show if Edison’s original claim that they would last 100 years isn’t mere marketing…..

They concluded…….:

This find of these old Thomas Edison Nickel-Iron cells has been quite an education for us at Battery Research and Testing, as our work for the past 29 years has been primarily with lead acid and some Nickel-Cadmium, but with nothing of the age of these cells. In fact the oldest lead acid cells that we have load tested and that were still functional were old Exide Manchex strings that were 42 years old, and it appears that the only existing lead acid cells that might be able to be functional at 40 years of age are the Bell developed round cells for Telecom applications.

What we have learned has opened up our minds to explore possibilities for this design long life design cell. It would sure seem that any site that has a requirement for a long life battery that will tolerate abusive conditions would consider the total life costs of these type cells and see which works out to be the most cost effective.


Electric vehicle batteries ‘already cheaper than 2020 projections’

25 03 2015

As the cost of everything seems to be plummeting right now, I, who always plays the devil’s advocate and sceptic of the first order, find it hard to not wonder if Nicole Foss’ much vaunted deflationary spiral is not already underway.  Just this morning I found out that the US coal industry is in trouble.  Then, reports of worsening problems are finally surfacing about the oil industry.  As we all know here at DTM, without a profitable fossil fuel industry, absolutely nothing else will eventuate when it comes to the alternatives……..  so what to make of this?  All I can say is, hang onto your hat, because the ride will be interesting.

The US coal market is crashing in what analysts warn is a sign of things to come for other fossil fuel markets.

At least 26 coal producers have gone bankrupt in the last three years, the Carbon Tracker Initiative think-tank found.

Others including Peabody Energy, the world’s largest private coal company, have lost 80% of their share value.

“Cheap gas has knocked coal off its feet, and the need to improve air quality and ever-lower renewables costs has kept coal down for the count,” said report co-author Luke Sussams.

Meanwhile, demand growth from Asia has been slower than expected. China’s coal consumption fell 3% in 2014 as the country sought to tackle increasingly severe air pollution in its cities.


In the latest week, drillers idled another 41 oil rigs, according to Baker Hughes. Only 825 rigs were still active, down 48.7% from October. In the 23 weeks since, drillers have idled 784 oil rigs, the steepest, deepest cliff-dive in the history of the data:


The number of rigs drilling for natural gas dropped by 15 to 242, the lowest rig count since March 1992 and down 85% from its peak in 2008.

By Simon Evans

The cost of electric vehicle battery packs is falling so rapidly they are probably already cheaper than expected for 2020, according to a new study in Nature Climate Change.

Electric vehicles remain more expensive than combustion-engine equivalents, largely because of battery costs. In 2013 the International Energy Agency estimated cost-parity could be reached in 2020, with battery costs reaching $300* per kilowatt-hour of capacity.

But market-leading firms were probably already producing cheaper batteries last year, says today’s new research. It says its figures are “two to four times lower than many recent peer-reviewed papers have suggested”.

High costs, falling

Even though the  EU electric vehicle market grew by 37% year on year in 2014, it still made up less than 1% of total sales. High cost is a major reason why electric vehicles have failed to break through, alongside range and a lack of recharging infrastructure.

The new research is based on a review of 85 cost estimates in peer-reviewed research, agency estimates, consultancy and industry reports, news reports covering the views of industry representatives and experts and finally estimates from leading manufacturers.

It says industry-wide costs have fallen from above $1000 per kilowatt-hour in 2007 down to around $410 in 2014, a 14% annual reduction (blue marks, below). Costs for market-leading firms have fallen by 8% per year, reaching $300 per kilowatt hour in 2014 (green marks).

Figure 1: Cost estimates and future projections for EV battery packs, measured in $US per kilowatt hour of capacity. Each mark on the chart represents a documented estimate reviewed by the study. 

Screen Shot 2015-03-23 At 14.22.10

Source: Nykvist et al. (2015).

For the market-leading firms, shown in green on the chart above, costs last year were already at the bottom end of projections for 2020 (yellow triangles).

The paper estimates prices will fall further to around $230 per kilowatt-hour in 2017-18, “on a par with the most optimistic future estimate among analysts”. The crossover point where electric cars become cheapest depends on electricity costs, vehicle taxes and prices at the pump.

In the US, with current low oil prices, battery packs would need to fall below $250 per kilowatt-hour for electric cars to become competitive, the study says. Behavioural barriers to electric vehicle uptake present additional hurdles to widespread adoption.

The paper says:

“If costs reach as low as $150 per kilowatt-hour this means that electric vehicles will probably move beyond niche applications and begin to penetrate the market more widely, leading to a potential paradigm shift in vehicle technology.”

Learning rate

To reach that level, costs will have to fall further. But a commercial breakthrough for the next generation of lithium batteries “is still distant”, the paper says, and many improvements in cell chemistry have already been realised. This seems to pour cold water on frequent claims of new battery types “transforming” the electric vehicle market.

However, there are still savings to be made in manufacturing improvements, industry learning and economies of scale, which have already brought down costs in recent years. Cumulative global production and sales of electric vehicles are roughly doubling annually, the paper says.

That means the 30% cost reduction expected at Tesla Motors’ planned “Gigafactory” battery plant by 2017 represents a “trajectory close to the trends projected in this paper”. On the other hand Renault-Nissan’s plans to build battery manufacturing capacity for 1.5 million cars by 2016 have hit the buffers as electric car sales have trailed expectations.

There are large uncertainties in the paper’s findings. Despite being the most comprehensive review to date, it relies on “sparse data” and acknowledges that a secretive industry might avoid revealing high costs, or conversely might subsidise battery packs to gain market share.

Overall it is “possible” that economies of scale will push costs down towards $200 kilowatt-hour “in the near future even without further cell chemistry improvements”, the paper concludes. If the paper is right then electric vehicle uptake could exceed expectations. That will be a good thing for the climate – just as long as the electricity that fuels them is not from coal.

*All dollar figures are in USD

Originally published by Carbon Brief.

Where is the electric grid headed?

19 11 2014

Followers of this blog will know my enthusiasm for solar power as a silver bullet for our future energy predicaments has waned, and in particular, my love affair with grid tied solar is over.  I have also been doubting for quite some time that the future of the electric grid is secure, and have on occasions discussed stand alone solar power as a possibility for those of us who are aware of the coming dilemmas to stretch their energy horizon a little further and make the inevitable energy descent less painful.  Well, it seems, this theme is catching on, even making it to what I consider to be mainstream internet sources.

Recently, on the Climate Spectator website (an arm of Alan Kohler’s straight as a die Business Spectator financial website), an article titled “Solar wins! Zombie-grid a dead man walking” began with this paragraph:

The grid financial model will collapse within 10 years, as millions of Australian households flee for the new, disruptive and cheaper alternative. This change will be as big as the conversion from horse and cart to motor vehicle, film to digital camera and the typewriter to the laptop.

I nearly fell off my chair…… because let’s face it, if the collapse of the grid financial model is not soon followed by total collapse, I would eat my hat.  The reasons the author – Matthew Wright CEO of Beyond Zero Emissions – gives for this prediction are:

Modeling by Zero Emissions Australia shows that an ordinary, but all-electric, household using off-the-shelf efficient electric appliances could be off the grid for between $30,000-$40,000 today and $12,000-$20,000 in 2024.

This is based on the following representative example of electricity demand charted below for an all-electric five-person household in Melbourne.

Example: One year of average monthly demand for all electric household in Melbourne (5 occupants).



Source: Powershop, Zero Emissions Australia

Households can install and size their off-grid solar system now and change their redundant gas appliances (stove top, gas hot water and gas heating) over later. Or, given that the price is going to be right to leave sometime in the next 10 years, they can start their electric conversion journey now. Ditching gas and the power grid starts by installing an oversized solar system (11-15kW) on the north, east, west and possibly even flat-racked. Indeed you can place it on the south face which captures diffuse light when its cloudy – which contributes over half of all generation during the middle of winter (more on that in another article).

10kW PV System

10kW PV System

I’m frankly AGHAST!  I wonder if Matthew has even ever seen a 10kW PV system (let alone a 15 kW one…)  One of my neighbours has such a large system on his roof, installed before Energex put their foot down and limited grid tied systems to 5kW, and it looks like the photo opposite.  Bear in mind this house was designed for solar to begin with, faces true North, built with a skillion roof, and is bigger than our place by some margin at 250m².  And yet, its roof is completely covered….  Try that on a standard McMansion hipped roof….

Consumption is consumption, whether it’s PVs or whatever, and at least KC exports 90% or more of what power his system produces, he doesn’t actually need it to run his house!  Any household that needs 11 to 15kW of solar has a serious efficiency problem that needs to be solved before spending “$30,000-$40,000“, and if Matthew believes such schemes are ways of dealing with Carbon emissions, he is seriously mistaken.

Then, he pushes heat pumps for water heating rather than solar……  I thought the title of this piece was “solar wins!”?  Why buy an electricity consuming gadget, even if very efficient, when there are alternatives that do not?  Matthew doesn’t even seem to understand the physics of energy with the statement “achieves Coefficient of Performance (COP) of ~4.0 or (400% efficient, yes that is possible)”  NO Matthew, 400% efficiency is NOT possible, COP is not efficiency…..  And you wonder why I have so many doubts about BZE’s green wet dream of 100% renewables for Australia?

But back to our grid problems.

“Industrialized countries face a future of increasingly severe blackouts, a new study warns, due to the proliferation of extreme weather events, the transition to unconventional fossil fuels, and fragile national grids that cannot keep up with rocketing energy demand” says Motherboard….

The paper published this September in Routledge’s Journal of Urban Technology points out that 50 major power outages have afflicted 26 countries in the last decade alone, driven by rapid population growth in concentrated urban areas and a rampant “addiction” to high-consumption lifestyles dependent on electric appliances.

Study authors Hugh Byrd and Prof Steve Matthewman of Auckland University, a sociologist of disaster risk, argue that this escalating demand is occurring precisely “as our resources become constrained due to the depletion of fossil fuel, a lack of renewable energy sources, peak oil and climate change.”

Blackouts, they warn, are “dress rehearsals for the future in which they will appear with greater frequency and severity,” they find. “We predict increasing numbers of blackouts due to growing uncertainties in supply and growing certainties in demand.”

The relentless growth in demand, 1300 percent from 1940 to 2001 in the US (and likely much the same here), is the obvious culprit with aircon requirements at the forefront.  And let’s not forget the coming new fad…..

Adding further pressure to future electricity demand is the rise of the electric vehicle, driven by efforts to mitigate climate change. Byrd and Matthewman note that in higher-income regions, switching entirely to electric cars would increase electricity demand by 15-40 percent. Even if we replaced all our petrol-guzzling cars with “highly efficient” electric cars, the new models would still consume about “twice as much electricity as residential and commercial air-conditioning combined.”

And as climate change brings warmer Summers and more intense rains to regions of North America and Australia, people resort to more and more air-conditioning to stay cool, another climate positive feedback loop maybe?

Worldwide, overall energy demand for air-conditioning “is projected to rise rapidly to 2100,” to as much as 40 times greater than it was in 2000. New York alone will need 40 percent more power in the next 15 years partly because the city will contain a million more people, aided of course by electrical appliances, elevators, and air-conditioning.

Yeah right….  like that‘s going to happen, with a failing grid model….?  The article even goes further saying “But in a slow-growth global economy hell-bent on austerity, the prospects for large government investments in grid resilience look slim. According to the global insurance company Allianz in an extensive report on blackout risks in the US and Europe, “privatization and liberalization” have contributed to “missing incentives to invest in reliable, and therefore well maintained, infrastructures.””

A new report by the French multinational technology firm CapGemini warns of a heightened risk of blackouts across Europe this winter due to the shut-down of gas-fired plants, competition from cheap US coal, and the big shift to wind and solar. Ironically, electricity surpluses from renewables have led to a fall in power prices and crippled fossil fuel utilities, which in turn has reduced the “electricity system’s margin to meet peak demand in specific conditions such as cold, dark and windless days,” according to the report.

So it seems the grid’s financial model in Europe is in just as deep a hole as Australia’s.  The more I think of the terminology ‘disruptive’ used to describe renewables, the more I think it’s accurate!  The increasing shift to renewable energy sources has, it appears, exacerbated the blackout risk not because they are bad at generating power, but because of the difficulty in integrating volatile, decentralized energy sources into old power grids designed half a century ago around the old fossil fuel model.  Something the BZE people just don’t seem to understand.

Take this for example:  Our friend Matthew Wright is at it again with “Imagine 1000 gigafactories – that’s what’s coming”

No doubt you have all heard of El on Musk, the CEO of Tesla, the electric car company.  “Tesla is everyone’s favourite motor car company, a darling of investors large and small. Rev heads who have driven a Tesla give it the nod” writes Matthew.  Well of course they’d give it the nod…. just like anyone who drives a brand new Range Rover would give that car the nod; after all, after driving our old bombs around, I’m sure I would be mighty impressed with a car worth some $70,000 too……

Musk’s gigafactories will be the world’s largest lithium-ion battery factory, and is expected to generate as much renewable energy as it needs to operate — and then some.  But is that thin line at the bottom right of the photo a road, or a mighty big cable going to Bolivia’s Lithium mines…?

Here’s the first problem with celebratory headlines over renewables: record renewable energy growth hasn’t stopped record fossil fuel burning, including record levels of coal burning. Coal use is growing so fast that the International Energy Authority expects it to surpass oil as the world’s top energy source by 2017.  And building gigafactories is only worsening the problem.

Mabe, the 1,500 gigawatts of electricity produced from renewables worldwide have prevented a further 1,500 gigawatts of fossil fuel power stations? Who can tell?  It’s just as possible that renewables have simply added 1,500 gigawatts of electricity to the global economy, fuelling economic growth and ever-greater industrial resource use. That being the case, far from limiting carbon dioxide emissions worldwide, renewables may simply have increased them because, as I’ve written many times before, no form of large-scale energy is carbon neutral.

And no one mentions the looming economic crisis having an effect on the grid’s reliability.  The future is taboo.  Watch this space…

Another Silver Bullet Jams in the Breach…….

23 08 2014

One of the silver bullets constantly used by techno Utopians is of course the Electric Car, popularly known as EVs (the V stands for vehicle).  Before the believers in this technology jump down my throat for demolishing their ideals, let me tell you I am planning – the timing of the collapse allowing of course – to eventually convert my trusty ute to electric drive once I get it safely to Tasmania.  Now you may ask why I would do that if I don’t believe in EVs taking over the world in the first place, and I’ll forgive you for asking……  but like everything else I’m about to do in the face of collapse, the motive is purely selfish.  Though I expect such a vehicle could well become a communal asset that might make me popular enough to get assistance with implementing all sorts of other ideas I have for our post crash  future.  It won’t be used for shopping or dropping kids to soccer matches, that’s for sure, but a vehicle capable of carrying a ton of firewood or compost or scrap building materials will sure come in handy.  How fast it can go, or what its range is, or what it’s nought to sixty figure is, are totally irrelevant…. the reason I’ll be doing this is to ensure we have access to a workhorse in the post oil era.

I don’t expect it will be driven that much, and it should be easily kept charged up using the renewable energy I’m planning to install at our next abode.  Let’s hope the Matrix stays together long enough to actually achieve this.

Converting an old car to electric drive means you don’t have to build a whole car.  The amount of energy and resources needed to build a car, any car (and it actually takes more resources to build an EV than an IC powered vehicle of the same size..) is truly staggering.  There was one paragraph in one of my recent posts that was very telling, and that I must resurface here in case anyone reading this has not read it yet…:

“Most of the pollution any car will ever cause is generated in the production process before the car even arrives at the showroom — in the production of all the steel, aluminium, copper and other metals, glass, rubber, plastic, paint and other raw materials and inputs that go into every automobile, and in the manufacturing process itself. Cars produce 56 percent of all the pollution they will ever produce before they ever hit the road. … [S]o long as [automakers] are free to produce automobiles without limit more cars will just mean more pollution, even if the cars are hybrids or plug-in electric cars.”

This is actually far worse than the 60 to 90 barrels of oil I’ve been quoting for years……  XRayMike, as usual, puts this into perspective in his own inimitable way:

The role that fossil fuels play in the creation, maintenance and support of alternative energy technologies is not discussed or analyzed at all by those peddling it to the masses who live with the hope of a “green” economy and carbon-neutral civilization. From the massive mining operations and manufacturing processes necessary to extract the rare earth metals essential in constructing wind turbines, solar panels, and electric car batteries to their daily maintenance, de-activation, and final discardment, the amount of fossil fuel energy embedded in the entire life cycle of such alternative energy technologies renders moot their benefits when compared to what is actually more effective in solving our energy and climate conundrum —reducing our consumption through energy efficiency improvements and waste reduction programs. Alternative energy technologies cannot replace our dependence on fossil fuels and are, in the final analysis, diverting us from coming to grips with a way-of-life that cannot go on for much longer. We have a consumption crisis.

Buried in the comments at the abovementioned page of this blog, Gordon sourced a German report that has figures showing that the pollution numbers for the manufacture of EVs are so bad, that in any event, converting to ‘green transport’ would only reduce CO2 emissions by 20%.  When in fact we need immediate reductions of at least 90%.

“Cars produce 56 percent of all the pollution they will ever produce before they ever hit the road. …”

I think the more relevant quote from the original German Environment and Forecasting Institute report is, in relation to CO2 emissions:

68% of all of a car’s emissions comes from processing and transporting the raw materials;10% is emitted as a result of manufacturing, scrapping, and constructing roads and garage facilities; and only 22% of CO2 emissions comes from the actual operation of the car.

So assuming that this distribution of emissions applies broadly to electric vehicles, a total changeover to electric cars would save only around 20% of the car-related emissions.

Now bring online the manufacturing of millions of such cars, and emissions will not drop, they will rise dramatically.

Following Elon Musk’s public release of all his Tesla patents, l can’t help but wonder if his real motivation is hidden in the penultimate paragraph of this article on The Conversation:

The latest move by Tesla and its partner, Panasonic, will see the construction of the new Gigafactory, which will produce long range battery packs for Tesla’s electric vehicles.

He is not really in the electric vehicle business at all, he is in the battery business.  I’m sure he’s smart enough to have seen the writing on the wall too….  No matter what else goes into an individual electric vehicle design, they will all need batteries.  And these batteries will better serve stationary use than mobile ones that will have to deal with fast deteriorating roads in a post crash world.

Below is an excerpt from a must-see talk by engineer and energy analyst Ozzie Zehner, author of Green Illusions:

Common knowledge presumes that we have a choice between fossil fuels and green energy, but alternative energy technologies rely on fossil fuels through every stage of their life cycle. Most importantly, alternative energy financing relies ultimately on the kind of economic growth that fossil fuels provide. Alternative energy technologies rely on fossil fuels for raw material extraction, for fabrication, for installation and maintenance, for back-up, as well as decommissioning and disposal. And at this point, there’s even a larger question: where will we get the energy to build the next generation of wind power and solar cells? Wind is renewable, but turbines are not. Alternative energy technologies rely on fossil fuels and are, in essence, a product of fossil fuels. They thrive within economic systems that are themselves reliant on fossil fuels.

Now, I’m no fan of fossil fuels. Fossil fuels are finite and dirty, but we use them for five principal reasons. Fossil fuels are dense. Their energy is storable, portable, fungible (which means they can be easily traded), and they are transformable into other products like pesticides, fertilizers, and plastics.

I have only just discovered Zehner.  Hat tip to XRayMike for introducing me to this extraordinary man…  He is basically saying the exact same thing I’ve been saying for years, only better, and he knows even more than I about how ridiculous the whole concept of running the world on solar is.  Like me, he also understands the Power of Energy Efficiency.  Even the power of a sticker…  The must see talk is here…..  it will blow you away, I guarantee it:

After seeing that, maybe I should even reconsider all my plans for Tasmania…..  like buying fifty years supply of inverters!