U.S. to work with allies to secure electric vehicle metals


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US EV Battery Minerals Strategy prioritizes critical minerals with allies, lithium and copper sourcing, battery recycling, and domestic processing, leveraging the Development Finance Corporation to strengthen EV supply chains and reduce reliance on China.

 

Key Points

A US plan to secure critical minerals with allies, boost recycling, and expand domestic processing for EV batteries.

✅ DFC financing for allied lithium and copper projects

✅ Battery recycling to diversify critical mineral supply

✅ Domestic processing with strong environmental standards

 

The United States must work with allies to secure the minerals needed for electric vehicle batteries, addressing pressures on cobalt reserves that could influence supply, and process them domestically in light of environmental and other competing interests, the White House said on Tuesday.

The strategy, first reported by Reuters in late May, will include new funding to expand international investments in electric vehicles (EV) metal projects through the U.S. Development Finance Corporation, as well as new efforts to boost supply from EV battery recycling initiatives.

The U.S. has been working to secure minerals from allied countries, including Canada and Finland, with projects such as Alberta lithium development showing potential. The 250-page report outlining policy recommendations mentioned large lithium supplies in Chile and Australia, the world's two largest producers of the white battery metal.

President Joe Biden's administration will also launch a working group to identify where minerals used in EV batteries and other technologies can be produced and processed domestically.

Securing enough copper, lithium and other raw materials to make EV batteries, amid lithium supply concerns heightened by recent disruptions, is a major obstacle to Biden’s aggressive EV adoption plans, with domestic mines facing extensive regulatory hurdles and environmental opposition.

The White House acknowledged China's role as the world's largest processor of EV metals and said it would expand efforts, including a 100% EV tariff on certain imports, to lessen that dependency.

"The United States cannot and does not need to mine and process all critical battery inputs at home. It can and should work with allies and partners to expand global production and to ensure secure global supplies," it said in the report.

The White House also said the Department of the Interior and others agencies will work to identify gaps in mine permitting laws to ensure any new production "meets strong standards" in terms of both the environment and community input.

The report noted Native American opposition to Lithium Americas Corp's (LAC.TO) Thacker Pass lithium project in Nevada, as well as plans by automaker Tesla Inc (TSLA.O) to produce its own lithium.

The steps come after Biden, who has made fighting climate change and competing with China centerpieces of his agenda, ordered a 100-day review of gaps in supply chains in key areas, including EVs.

Democrats are pushing aggressive climate goals, as Canada EV manufacturing accelerates in parallel, to have a majority of U.S.-manufactured cars be electric by 2030 and every car on the road to be electric by 2040.

As part of the recommendations from four executive branch agencies, Biden is being advised to take steps to restore the country's strategic mineral stockpile and expand funding to map the mineral resources available domestically.

Some of those steps would require the support of Congress, where Biden's fellow Democrats have only slim majorities.

The Energy Department already has $17 billion in authority through its Advanced Technology Vehicles Manufacturing Loan program to fund some investments, and is also launching a lithium-battery workforce initiative to build critical skills.

The program’s administrators will focus on financing battery manufacturers and companies that refine, recycle and process critical minerals, the White House said.

 

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UK Electric Vehicle Sales Surge to Record High

UK electric vehicle sales reached a record high in September, with battery and hybrid cars making up over half of new registrations. SMMT credits carmaker discounts, new models, and a £3,750 EV grant for driving strong demand across the UK market.

 

Why are UK Electric Vehicle Sales Surging to a Record High?

UK electric vehicle sales are surging to a record high because automakers are offering major discounts, more models are available than ever, and the government’s new £3,750 EV grant is making electric cars more affordable and appealing to both fleets and private buyers.

✅ BEV sales up nearly one-third in September

✅ Over half of all new cars are now electrified

✅ £3,750 EV grants boost consumer confidence

 

Electric vehicle (EV) sales in the United Kingdom reached a record high last month, marking a significant milestone in the country’s transition to cleaner transportation. According to the latest figures from the Society of Motor Manufacturers and Traders (SMMT), sales of pure battery electric vehicles (BEVs) surged by nearly one-third to 72,779 units in September, while plug-in hybrid registrations grew even faster.

The combined total of fully electric and hybrid vehicles accounted for more than half of all new car registrations, underscoring the growing appeal of electrified transport, alongside global EV market growth, among both businesses and private consumers. In total, 312,887 new vehicles were registered across the country — the strongest September performance since 2020, according to SMMT data.

SMMT chief executive Mike Hawes said the surge in electrified vehicle sales showed that “electrified vehicles are powering market growth after a sluggish summer.” He credited carmaker incentives, a wider choice of models, and government support for helping accelerate adoption, though U.S. EV market share dipped in Q1 2024 by comparison. “Industry investment in electric vehicles is paying off,” Hawes added, even as he acknowledged that “consumer demand still trails ambition.”

The UK government’s new electric car grant scheme has played a significant role in the rebound. The program offers buyers discounts of up to £3,750 on eligible EVs priced under £37,000. So far, more than 20,000 motorists have benefited, with 36 models approved for reductions of at least £1,500. Participating manufacturers include Ford, Toyota, Vauxhall, and Citroën.

Ian Plummer, chief commercial officer at Autotrader, said the grant had given a “real lift to the market,” echoing fuel-crisis EV inquiry surge in the UK. He noted that “since July, enquiries for new electric vehicles on Autotrader are up by almost 50%. For models eligible for the grant, interest has more than doubled.”

While the majority of BEVs — about 71.4% — were purchased by companies and fleets, the number of private buyers has also been increasing. Zero-emission vehicles now account for more than one in five (22.1%) new car registrations so far in 2025, similar to France’s 20% EV share record, highlighting the growing mainstream appeal of electric mobility.

The surge comes amid a challenging backdrop for the automotive sector, even as U.S. EV sales soared into 2024 across the Atlantic. The UK car industry is still reeling from the effects of US trade tariffs and recent disruptions, such as Jaguar Land Rover’s production shutdown following a cyberattack. Despite these hurdles, the strong September figures have boosted confidence in the industry’s recovery trajectory, and EU EV share grew during lockdown months offers precedent for resilience.

Among individual models, the Kia Sportage, Ford Puma, and Nissan Qashqai led overall sales, while two Chinese vehicles — the Jaecoo 7 and BYD Seal U — entered the top ten, reflecting China’s growing footprint in the UK market. Analysts say the arrival of competitively priced Chinese EVs could further intensify competition and drive prices lower for consumers.

With electrified vehicles now dominating new registrations and fresh government incentives in place, industry observers believe the UK is gaining momentum toward its long-term net-zero goals. The challenge, however, remains converting business fleet enthusiasm into sustained private-buyer confidence through affordable models, with UK consumer price concerns still a factor, reliable charging infrastructure, and continued policy support.

 

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Electric vehicle owners can get paid to sell electricity back to the grid

Ontario EV V2G Pilots enable bi-directional charging, backup power, and grid services with IESO, Toronto Hydro, and Hydro One, linking energy storage, solar, blockchain apps, and demand response incentives for smarter electrification.

 

Key Points

Ontario EV V2G pilots test bidirectional charging and backup power to support grid services with apps and incentives.

✅ Tests Nissan Leaf V2H backup with Hydro One and Peak Power.

✅ Integrates solar, storage, blockchain apps via Sky Energy and partners.

✅ Pilots demand response apps in Toronto and Waterloo utilities.

 

Electric vehicle owners in Ontario may one day be able to use the electricity in their EVs instead of loud diesel or gas generators to provide emergency power during blackouts. They could potentially also sell back energy to the grid when needed. Both are key areas of focus for new pilot projects announced this week by Ontario’s electricity grid operator and partners that include Toronto Hydro and Ontario Hydro.

Three projects announced this week will test the bi-directional power capabilities of current EVs and the grid, all partially funded by the Independent Electricity System Operator (IESO) of Ontario, with their announcement in Toronto also attended by Ontario Energy Minister Todd Smith.

The first project is with Hydro One Networks and Peak Power, which will use up to 10 privately owned Nissan Leafs to test what is needed technically to support owners using their cars for vehicle-to-building charging during power outages. It will also study what type of financial incentives will convince EV owners to provide backup power for other users, and therefore the grid.

A second pilot program with solar specialist Sky Energy and engineering firm Hero Energy will study EVs, energy storage, and solar panels to further examine how consumers with potentially more power to offer the grid could do it securely, in part using blockchain technology. York University and Volta Research are other partners in the program, which has already produced an app that can help drivers choose when and how much power to provide the grid — if any.

The third program is with local utilities in Toronto and Waterloo, Ont., and will test a secure digital app that helps EV drivers see the current demands on the grid through improved grid coordination mechanisms, and potentially price an incentive to EV drivers not to charge their vehicles for a few hours. Drivers could also be actively further paid to provide some of the charge currently in their vehicle back to the grid.

It all adds up to $2.7 million in program funding from IESO ($1.1 million) and the associated partners.

“An EV charged in Ontario produces roughly three per cent of emissions of a gas fuelled car,” said IESO’s Carla Nell, vice-president of corporate relations and innovation at the announcement near Peak Power chargers in downtown Toronto. “We know that Ontario consumers are buying EVs, and expected to increase tenfold — so we have to support electrification.”

If these types of programs sound familiar, it may be because utilities in Ontario have been testing such vehicle-to-grid technologies soon after affordable EVs became available in the fall of 2011. One such program was run by PowerStream, now the called Alectra, and headed by Neetika Sathe, who is now Alectra’s vice-president of its Green Energy and Technology (GRE&T) Centre in Guelph, Ont.

The difference between now and those tests in the mid-2010s is that the upcoming wave of EV sales can be clearly seen on the horizon, and California's grid stability work shows how EVs can play a larger role.

“We can see the tsunami now,” she said, noting that cost parity between EVs and gas vehicles is likely four or five years away — without government incentives, she stressed. “Now it’s not a question of if, it’s a question of when — and that when has received much more clarity on it.”

Sathe sees a benefit in studying all these types of bi-directional power-flowing scenarios, but notes that they are future scenarios for years in the future, especially since bi-directional charging equipment — and the vehicles with this capability — are pricey, and largely still not here. What she believes is much closer is the ability to automatically communicate what the grid needs with EV drivers, as Nova Scotia Power pilots integration, and how they could possibly help. For a price, of course.

“If I can set up a system that says ‘oh, the grid is stressed, can you not charge for the next two hours? And here’s what we’ll offer to you for that,’ that’s closer to low-hanging fruit,” she said, noting that Alectra is currently testing out such systems. “Think of it the same way as offering your car for Uber, or a room on Airbnb.”

 

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Fact check: Claim on electric car charging efficiency gets some math wrong

EV Charging Coal and Oil Claim: Fact-check of kWh, CO2 emissions, and electricity grid mix shows 70 lb coal or ~8 gallons oil per 66 kWh, with renewables and natural gas reducing lifecycle emissions.

 

Key Points

A viral claim on EV charging overstates oil use; accurate figures depend on grid mix: ~70 lb coal or ~8 gallons oil.

✅ About 70 lb coal or ~8 gal oil per 66 kWh, incl. conversion losses

✅ EVs average ~100 g CO2 per mile vs ~280 g for 30 mpg cars

✅ Grid mix includes renewables, nuclear, natural gas; oil use is low

 

The claim: Average electric car requires equivalent of 85 pounds of coal or six barrels of oil for a single charge

The Biden administration has pledged to work towards decarbonizing the U.S. electricity grid by 2035. And the recently passed $1.2 trillion infrastructure bill provides funding for more electric vehicle (EV) charging infrastructure, including EV charging networks across the country under current plans.

However, a claim that electric cars require an inordinate amount of oil or coal energy to charge has appeared on social media, even as U.S. plug-ins traveled 19 billion miles on electricity in 2021.

“An average electric car takes 66 KWH To charge. It takes 85 pounds of coal or six barrels of oil to make 66 KWH,” read a Dec 1 Facebook post that was shared nearly 500 times in a week. “Makes absolutely no sense.” 

The post included a stock image of an electric car charging, though actual charging costs depend on local rates and vehicle efficiency.

This claim is in the ballpark for the coal comparison, but the math on the oil usage is wildly inaccurate.

It would take roughly 70 pounds of coal to produce the energy required to charge a 66 kWh electric car battery, said Ian Miller, a research associate at the MIT Energy Initiative. That's about 15 pounds less than is claimed in the post.

The oil number is much farther off.

While the post claims that it takes six barrels of oil to charge a 66 kWh battery, Miller said the amount is closer to 8 gallons  — the equivalent of 20% of one barrel of oil.

He said both of his estimates account for energy lost when fossil fuels are converted into electricity. 

"I think the most important question is, 'How do EVs and gas cars compare on emissions per distance?'," said Miller. "In the US, using average electricity, EVs produce roughly 100 grams of CO2 per mile."

He said this is more than 60% less than a typical gasoline-powered car that gets 30 mpg, aligning with analyses that EVs are greener in all 50 states today according to recent studies. Such a vehicle produces roughly 280 grams of CO2 per mile.

Lifecycle analyses also show that the CO2 from making an EV battery is not equivalent to driving a gasoline car for years, which often counters common misconceptions.

"If you switch to an electric vehicle, even if you're using fossil fuels (to charge), it's just simply not true that you'll be using more fossil fuel," said Jessika Trancik, a professor at the Massachusetts Institute of Technology who studies the environmental impact of energy systems.  

However, she emphasized electric cars in the U.S. are not typically charged using only energy from coal or oil, and that electricity grids can handle EVs with proper management.

The U.S. electricity grid relies on a diversity of energy sources, of which oil and coal together make up about 20 percent, according to a DOE spokesperson. This amount is likely to continue to drop as renewable energy proliferates in the U.S., even as some warn that state power grids will be challenged by rapid EV adoption. 

"Switching to an electric vehicle means that you can use other sources, including less carbon-intensive natural gas, and even less carbon-intensive electricity sources like nuclear, solar and wind energy, which also carry with them health benefits in the form of reduced air pollutant emissions," said Trancik. 

Our rating: Partly false
Based on our research, we rate PARTLY FALSE the claim that the average electric car requires the equivalent of 85 pounds of coal or six barrels of oil for a single charge. The claim is in the ballpark on coal consumption, as an MIT researcher estimates that around 70 pounds. But the oil usage is only about 8 gallons, which is 20% of one barrel. And the actual sources of energy for an electric car vary depending on the energy mix in the local electric grid. 

 

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Ottawa to release promised EV sales regulations

Canada ZEV Availability Standard sets EV sales targets and zero-emission mandates, using compliance credits, early credits, and charging infrastructure investments under CEPA to accelerate affordable ZEV supply and meet 2035 net-zero goals.

 

Key Points

A federal ZEV policy setting 2026-2035 sales targets, using tradable credits and infrastructure incentives under CEPA.

✅ Applies to automakers; compliance via tradable ZEV credits under CEPA.

✅ Targets: 20% by 2026, 60% by 2030, 100% by 2035.

✅ Early credits up to 10% for 2026; charging investments earn credits.

 

Canadian Automobile manufacturers are on the brink of significant changes as Ottawa prepares to introduce its long-awaited electric vehicle regulations. A reliable source within the government says final regulations are aimed at ensuring that all new passenger vehicles sold in Canada by 2035 are zero-emission vehicles, a goal some critics question through analyses of the 2035 EV mandate in Canada.

These regulations, known as the Electric Vehicle Availability Standard, are designed to encourage automakers to produce more affordable zero-emission vehicles to meet the increasing demand. One of the key concerns for Canada is the potential dominance of zero-emission vehicle supply by other countries, particularly the United States, where several states have already implemented sales targets for such vehicles, and new EPA emission limits are expected to boost EV sales nationwide as well.

It's important to note that these regulations will apply primarily to automakers, rather than dealerships. Under this legislation, manufacturers will be required to accumulate sufficient credits to demonstrate their compliance with the established targets.

Automakers will be able to earn credits based on their sales of low- and no-emissions vehicles. The number of credits earned will depend on how close these vehicles come to meeting a zero-emissions standard. Additionally, manufacturers could earn early credits, amounting to a maximum of 10 percent of their total compliance requirements for 2026, by introducing more electric vehicles to the market ahead of schedule, even amid recent EV shortages and wait times reported across Canada.

Automakers can also increase their credit balance by contributing to the development of electric vehicle charging infrastructure, recognizing that fossil fuels still powered part of Canada's grid in 2019 and that charging availability remains a key enabler. In cases where companies exceed or fall short of their compliance targets, they will have the option to buy or sell credits to other manufacturers or use previously accumulated credits.

Further details regarding these regulations, which will be enacted under the Canadian Environmental Protection Act, are set to be unveiled soon and will intersect with provincial approaches such as Quebec's, where experts have questioned the push for EV dominance as policies evolve.

These regulations will become effective starting with the model year 2026, and sales targets will progressively rise each year until 2035. The federal government's ambitious EV goals are to have 20 percent of all vehicles sold in Canada be zero-emission vehicles by 2026, with that figure increasing to 60 percent by 2030 and reaching 100 percent by 2035.

According to a government analysis conducted in 2022, the anticipated total cost to consumers for zero-emission vehicles and chargers over 25 years is estimated at $24.5 billion, though cost remains a primary barrier for many Canadians considering an EV. However, it is projected that Canadians will save approximately $33.9 billion in net energy costs over the same period. Please note that these estimates are part of a draft and may be subject to change upon the government's release of its final analysis.

In terms of environmental impact, these regulations are expected to prevent the release of an estimated 430 million tonnes of greenhouse gas emissions, according to regulatory analysis. Environmental Defence, a Canadian environmental think-tank, has estimated that the policy would also result in a substantial reduction in gasoline consumption, equivalent to filling approximately 73,000 Olympic-sized swimming pools with gasoline.

Nate Wallace, the program manager for clean transportation at Environmental Defence, emphasized the significance of these regulations, stating, "2035 really needs to be the last year that we are selling gasoline cars in Canada brand new if we're going to have any chance of actually, by 2050, reaching net-zero carbon emissions."

 

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Road to electric vehicle targets in Manitoba not smooth, experts say

Manitoba ZEV Roadblocks highlight EV charging station gaps, rural infrastructure limits, dealership supply shortages, and ZEV mandate timelines, pushing mode shift to transit, cycling, and walking while hampering zero-emission vehicle adoption across the province.

 

Key Points

EV charging gaps, rural access limits, and supply constraints slow Manitoba's progress toward ZEV targets.

✅ Sparse Level 3 fast chargers outside Winnipeg

✅ Rural infrastructure limits long-distance confidence

✅ Dealership supply lags; long pre-order wait times

 

The federal government’s push toward zero-emission vehicles (ZEVs), including forthcoming EV sales regulations, is hitting some roadblocks in Manitoba.

Earlier this year, Ottawa set a sales target to encourage Canadians to choose ZEVs. By 2026, their goal is to have ZEVs make up 20 per cent of new vehicle purchases. By 2035, they want all new vehicles sold to be ZEVs, a target that has sparked 2035 EV mandate debate among industry observers.

READ MORE: Ottawa sets 2026 target for mandating electric vehicle sales

Connie Blixhavn with the Manitoba Electric Vehicle Association (MEVA) doesn’t think Manitoba is on track.

“We’re not, not at all,” she said.

Blixhavn lives in Killarney, Man., and bought an electric vehicle last year. She plans her trips to Brandon and Winkler around the life of her car’s battery, but finds the charging infrastructure to be lacking and unreliable, a challenge echoed by Labrador's lagging infrastructure in Newfoundland and Labrador.

“Brandon is my closest place to get a level three charge, and when they’re not working, it limits where you can go,” she said.

Level three is the fastest type of EV charger, taking about 15-45 minutes to fully charge a vehicle’s batteries.

According to CAA, 68 of the province’s 94 EV charging stations are in Winnipeg. Blixhavn says it limits options for rural people to confidently adopt EVs, even as jurisdictions like the N.W.T. encourage EV adoption through targeted programs.

“I know we’re a big area, but they need to strategically plan where they put these so we all have access,” she said.

ZEVs are often not found on dealership lots – they have to be pre-ordered. One dealership employee told Global News demand far outweighs supply, amid EV shortages and wait times reported nationally, with some customers waiting one to two years for their new vehicle to arrive.

Mel Marginet with the Green Action Centre’s Sustainable Transporation Team is also wary of Manitoba’s ability to meet the 2026 goal, noting that even as experts question Quebec's EV push there are broader challenges. She believes the only way to come close is to change how much Manitobans use personal vehicles altogether.

“If we’re really concerned about the environment, we need to double and triple down on just reducing personal vehicle trips by and large,” she said.

Marginet points to transit, walking and cycling as ways to reduce reliance on driving.

“We depend on personal vehicles a lot in this province, and far more than we should have to,” she said. “My biggest worry is that we’ll take resources away from what we need to build to get people to use personal vehicles less.”

For Blixhavn, the lack of charging stations in her area has caused her to reduce her vehicle use. While she says she’s fine with the extra planning it takes to travel, she believes the lack of infrastructure is preventing Manitobans, especially those in rural areas, from catching up with other provinces, as Atlantic Canada EV interest lags the rest of the country, when it comes to choosing electric vehicles.

 

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Here's why the U.S. electric grid isn't running on 100% renewable energy yet

US Renewable Energy Transition is the shift from fossil fuels to wind, solar, and nuclear, targeting net-zero emissions via grid modernization, battery storage, and new transmission to replace legacy plants and meet rising electrification.

 

Key Points

The move to decarbonize electricity by scaling wind, solar, and nuclear with storage and transmission upgrades.

✅ Falling LCOE makes wind and solar competitive with gas and coal.

✅ 4-hour lithium-ion storage shifts solar to evening peak demand.

✅ New high-voltage transmission links resource-rich regions to load.

 

Generating electricity to power homes and businesses is a significant contributor to climate change. In the United States, one quarter of greenhouse gas emissions come from electricity production, according to the Environmental Protection Agency.

Solar panels and wind farms can generate electricity without releasing any greenhouse gas emissions, and recent research suggests wind and solar could meet about 80% of U.S. demand with supportive infrastructure. Nuclear power plants can too, although today’s plants generate long-lasting radioactive waste, which has no permanent storage repository.

But the U.S. electrical sector is still dependent on fossil fuels. In 2021, 61 percent of electricity generation came from burning coal, natural gas, or petroleum. Only 20 percent of the electricity in the U.S. came from renewables, mostly wind energy, hydropower and solar energy, according to the U.S. Energy Information Administration, and in 2022 renewable electricity surpassed coal nationwide as portfolios shifted. Another 19 percent came from nuclear power.

The contribution from renewables has been increasing steadily since the 1990s, and the rate of increase has accelerated, with renewables projected to reach one-fourth of U.S. generation in the near term. For example, wind power provided only 2.8 billion kilowatt-hours of electricity in 1990, doubling to 5.6 billion in 2000. But from there, it skyrocketed, growing to 94.6 billion in 2010 and 379.8 billion in 2021.

That’s progress, as the U.S. moves toward 30% electricity from wind and solar this decade, but it’s not happening fast enough to eliminate the worst effects of climate change for our descendants.

“We need to eliminate global emissions of greenhouse gases by 2050,” philanthropist and technologist Bill Gates wrote in his 2023 annual letter. “Extreme weather is already causing more suffering, and if we don’t get to net-zero emissions, our grandchildren will grow up in a world that is dramatically worse off.”

And the problem is actually bigger than it looks, even as pathways to zero-emissions electricity by 2035 are being developed.

“We need not just to create as much electricity as we have now, but three times as much,” says Saul Griffith, an entrepreneur who’s sold companies to Google and Autodesk and has written books on mass electrification. To get to zero emissions, all the cars and heating systems and stoves will have to be powered with electricity, said Griffith. Electricity is not necessarily clean, but at least it it can be, unlike gas-powered stoves or gasoline-powered cars.

The technology to generate electricity with wind and solar has existed for decades. So why isn’t the electric grid already 100% powered by renewables? And what will it take to get there?

First of all, renewables have only recently become cost-competitive with fossil fuels for generating electricity. Even then, prices depend on the location, Paul Denholm of the National Renewable Energy Laboratory told CNBC.

In California and Arizona, where there is a lot of sun, solar energy is often the cheapest option, whereas in places like Maine, solar is just on the edge of being the cheapest energy source, Denholm said. In places with lots of wind like North Dakota, wind power is cost-competitive with fossil fuels, but in the Southeast, it’s still a close call.

Then there’s the cost of transitioning the current power generation infrastructure, which was built around burning fossil fuels, and policymakers are weighing ways to meet U.S. decarbonization goals as they plan grid investments.

“You’ve got an existing power plant, it’s paid off. Now you need renewables to be cheaper than running that plant to actually retire an old plant,” Denholm explained. “You need new renewables to be cheaper just in the variable costs, or the operating cost of that power plant.”

There are some places where that is true, but it’s not universally so.

“Primarily, it just takes a long time to turn over the capital stock of a multitrillion-dollar industry,” Denholm said. “We just have a huge amount of legacy equipment out there. And it just takes awhile for that all to be turned over.”

 

Intermittency and transmission
One of the biggest barriers to a 100% renewable grid is the intermittency of many renewable power sources, the dirty secret of clean energy that planners must manage. The wind doesn’t always blow and the sun doesn’t always shine — and the windiest and sunniest places are not close to all the country’s major population centers.

Wind resources in the United States, according to the the National Renewable Energy Laboratory, a national laboratory of the U.S. Department of Energy.
Wind resources in the United States, according to the the National Renewable Energy Laboratory, a national laboratory of the U.S. Department of Energy.
National Renewable Energy Laboratory, a national laboratory of the U.S. Department of Energy.
The solution is a combination of batteries to store excess power for times when generation is low, and transmission lines to take the power where it is needed.

Long-duration batteries are under development, but Denholm said a lot of progress can be made simply with utility-scale batteries that store energy for a few hours.

“One of the biggest problems right now is shifting a little bit of solar energy, for instance, from say, 11 a.m. and noon to the peak demand at 6 p.m. or 7 p.m. So you really only need a few hours of batteries,” Denholm told CNBC. “You can actually meet that with conventional lithium ion batteries. This is very close to the type of batteries that are being put in cars today. You can go really far with that.”

So far, battery usage has been low because wind and solar are primarily used to buffer the grid when energy sources are low, rather than as a primary source. For the first 20% to 40% of the electricity in a region to come from wind and solar, battery storage is not needed, Denholm said. When renewable penetration starts reaching closer to 50%, then battery storage becomes necessary. And building and deploying all those batteries will take time and money.
 

 

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