Utility-scale batteries and pumped storage return about 80% of the electricity they store


stored energy

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Electric energy storage enables grid flexibility for renewables using utility-scale batteries and pumped-storage hydropower, delivering high round-trip efficiency, scalable capacity, and longer durations, according to EIA data as intermittent generation and demand variability increase.

 

Key Points

Electric energy storage saves power for later use using batteries and pumped storage to boost efficiency.

✅ Batteries: ~82% round-trip efficiency in 2019 (EIA)

✅ Pumped-storage: ~79% round-trip efficiency in 2019 (EIA)

✅ Pumped-storage 21.9 GW; utility-scale batteries 1.4 GW (Nov 2020)

 

Electric energy storage is becoming more important to the energy industry as the share of intermittent generating technologies, such as wind and solar, in the electricity mix increases. Electric energy storage helps to meet fluctuating demand, as many utilities see benefits from deployment, which is why it is often paired with intermittent sources. Storage technologies include batteries and pumped-storage hydropower, which capture energy and store it for later use and increasingly support EV-related grid flexibility as mobile chargers bring new options. Storage metrics can help us understand the value of the technology. Round-trip efficiency is the percentage of electricity put into storage that is later retrieved. The higher the round-trip efficiency, the less energy is lost in the storage process. According to data from the U.S. Energy Information Administration (EIA), in 2019, the U.S. utility-scale battery fleet operated with an average monthly round-trip efficiency of 82%, and pumped-storage facilities operated with an average monthly round-trip efficiency of 79%.


 

EIA’s Power Plant Operations Report provides data on utility-scale energy storage, and initiatives to enable storage in Ontario illustrate system-level integration, including the monthly electricity consumption and gross electric generation of energy storage assets, which can be used to calculate round-trip efficiency. The metrics reviewed here use the finalized data from the Power Plant Operations Report for 2019—the most recent year for which a full set of storage data is available.

Pumped-storage facilities are the largest energy storage resource in the United States, and regions anticipating tight supply, such as Ontario supply crunch, are also evaluating expanded storage portfolios. The facilities collectively account for 21.9 gigawatts (GW) of capacity and for 92% of the country’s total energy storage capacity as of November 2020.

In recent years, utility-scale battery capacity has grown rapidly as battery costs have decreased, and New York BESS is cited as a needed clean energy solution, underscoring this trend. As batteries have been increasingly paired with renewables in markets worldwide, including Ontario to rely on battery storage to meet rising demand, they have become the second-largest source of electricity storage. As of November 20, 2020, utility-scale battery capacity had 1.4 GW of operational capacity. Another 4.0 GW of battery capacity is scheduled to come online in 2021, according to EIA’s Preliminary Electric Generator Inventory.

Although battery storage has slightly higher round-trip efficiency than pumped storage, pumped-storage facilities typically operate at utilization factors that are currently twice as high as batteries. Increasing durations among battery applications could shift battery operations toward services that reward longer output periods. For example, in 2015, the weighted average battery duration was a little more than 46 minutes, but by 2019, weighted average battery durations had doubled to 1.5 hours, and emerging long-duration projects are targeting 100-hour capabilities. The role of batteries and their capability to provide high levels of round-trip efficiency may become more important as batteries continue to be deployed and as the intermittent renewables share of the electricity mix grows.

 

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America's Largest Energy Customers Set a Bold New Ambition to Achieve a 90% Carbon-free U.S. Electricity System by 2030 and Accelerate Clean Energy Globally

Clean Energy Buyers Alliance 2030 Goal targets a 90% carbon-free U.S. grid, accelerating power-sector decarbonization via corporate renewable energy procurement, market and policy reforms, and customer demand to enable net-zero electrification across industries.

 

Key Points

The Alliance's plan to reach a 90% carbon-free U.S. electricity system by 2030 via customer-driven markets and policy.

✅ Corporate buyers scale renewable PPAs and aggregation

✅ Market and policy reforms unlock clean power access

✅ Goal aligns with net-zero and widespread electrification

 

The Clean Energy Buyers Association (CEBA) and the Clean Energy Buyers Institute (CEBI), which together make up the Clean Energy Buyers Alliance, have announced a profound new aspiration for impact: a 90% carbon-free U.S. electricity system by 2030 and a global community of energy customers driving the global energy transition forward.

Alongside the two organizations’ bold new vision of the future – customer-driven clean energy for all – the Alliance will super-charge the work of its predecessor organizations, the Renewable Energy Buyers Alliance (REBA) and the REBA Institute, which represent the most iconic global companies with more than $6 trillion dollars in annual revenues and 14 million employees.

“This is the decisive decade for climate action and especially for decarbonization of the power sector,” said Miranda Ballentine, CEO of CEBA and CEBI. “To achieve a net-zero economy worldwide by 2050, the United States must lead. And the power sector must accelerate toward a 2030 timeline as electrification of other industries will be driving up power use.”

In the U.S. alone, more than 60% of electricity is consumed by the commercial and industrial sectors. Institutional energy customers have accelerated the deployment of clean energy solutions over the last 10 years to achieve increasingly ambitious greenhouse gas reduction targets, even as a federal coal plan remains under debate, and further cement the critical role of customers in decarbonizing the energy system. The Clean Energy Buyers Association Deal Tracker shows that 7.9 GW of new corporate renewable energy project announcements in the first three quarters of this year are equivalent to 40% of all new carbon free energy capacity added in the U.S. so far in 2021.

“With our new vision of customer-driven clean energy for all, we are also unveiling new organization brands,” Ballentine continued. “I’m excited to announce that REBA will become CEBA—the Clean Energy Buyers Association—and will focus on activating our community of energy customers and partners to deploy market and policy solutions for a carbon-free energy system. The REBA Institute will become the Clean Energy Buyers Institute (CEBI) and will focus on solving the toughest market and policy barriers to achieving a carbon-free energy system in collaboration with policymakers, leading philanthropies, and energy market stakeholders. Together, CEBA and CEBI will make up the new Clean Energy Buyers Alliance.”

To decarbonize the U.S. electricity system 90% by 2030, a goal aligned with California's 100% carbon-free mandate efforts, and to activate a community of customers driving clean energy around the world, the Clean Energy Buyers Alliance will drive three critical transformations to:

Unlock markets so that energy customers can use their buying power and market-influence, building on a historic U.S. climate deal this year, to accelerate electricity decarbonization.

Catalyze communities of energy customers to actively choose clean energy through Mission Innovation collaborations and to do more together than they could on their own.

Decarbonize the grid for all, since not every energy customer can or will use their buying power to choose clean energy.

“The Clean Energy Buyers Alliance is setting the bar for what energy buyers, utilities and governments should and need to be doing to achieve a carbon-free energy future,” said Michael Terrell, CEBA board chair and Director of Energy at Google. “This ambitious approach is a critical step in tackling climate change. The time for meaningful climate action is now and we must collectively be bolder and more ambitious in our actions in both the public and private sectors – starting today.”

This new vision of customer-driven clean energy for all is an unprecedented opportunity for every member of the Clean Energy Buyers Alliance community – from energy customers to providers to manufacturers – to all parties up and down the energy supply chain to lead the evolution of a new energy economy, which will require incentives to double investment in clean energy to rise to $4 trillion by 2030.

 

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Wind power is Competitive on Reliability and Resilience Says AWEA CEO

Wind farm reliability services now compete in wholesale markets, as FERC and NERC endorse market-based solutions that reward performance, bolster grid resilience, and compensate ancillary services like frequency regulation, voltage support, and spinning reserve.

 

Key Points

Grid support from wind plants, including frequency, voltage, ramping, and inertial response via advanced controls.

✅ Enabled by advanced controls and inverter-based technology

✅ Compete in market-based mechanisms for ancillary services

✅ Support frequency, voltage, reserves; enhance grid resilience

 

 

American Wind Energy Association CEO Tom Kiernan has explained to a congressional testimony that wind farms can now compete, as renewables approach market majority, to provide essential electric reliability services. 

Mr Kiernan appeared before the US Congress House Energy and Commerce Committee where he said that, thanks to technological advances, wind farms are now competitive with other energy technologies with regard to reliability and resiliency. He added that grid reliability and resilience are goals that everyone can support and that efforts underway at the Federal Energy Regulatory Commission (FERC) and by market operators are rightly focused on market-based solutions to better compensate generators for providing those essential services.

AWEA strongly agreed with other witnesses on the panel who endorsed market-based solutions in their submitted testimony, including the American Petroleum Institute, Solar Energy Industries Association, Energy Storage Association, Natural Resources Defence Council, National Hydropower Association, and others. However, AWEA is concerned that the Department of Energy’s recent proposal to provide payments to specific resources based on arbitrary requirements is anti-competitive, and threatens to undermine electricity markets that are bolstering reliability and saving consumers billions of dollars per year.

“We support the objective of maintaining a reliable and resilient grid which is best achieved through free and open markets, with a focus on needed reliability services – not sources – and a programme to promote transmission infrastructure.”

Kiernan outlined several major policy recommendations in his testimony, including reliance on competitive markets that reward performance to ensure affordable and reliable electricity, a focus on reliability needs rather than generation sources and the promotion of transmission infrastructure investment to improve resilience and allow consumers greater access to all low-cost forms of energy.

The CEO of the North American Electric Reliability Corporation (NERC) has recently testified that the state of reliability in North America remains strong and the trend line shows continuing improvement year over year. Technological advances and innovation by over 100,000 US wind workers enable wind farms today to provide the grid reliability services traditionally provided by conventional power plants. NERC’s CEO emphasised in its testimony at last month’s hearing that “variable resources significantly diversify the generation portfolio and can contribute to reliability and resilience in important ways.”

 

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Cost is the main reason stopping Canadians from buying an electric car: Survey

Canada EV Incentives drive adoption toward the 2035 zero-emission target, with rebates, federal and provincial programs boosting affordability amid concerns over charging infrastructure, range anxiety, and battery life, according to a BNN Bloomberg-Leger survey.

 

Key Points

Canada EV incentives are rebates and tax credits reducing EV costs to accelerate zero-emission vehicle adoption nationwide.

✅ Federal and provincial rebates reduce EV purchase prices

✅ Incentives offset range, battery, and charging concerns

✅ Larger incentives correlate with higher adoption rates

 

If the federal government wants to meet its ambitious EV goals of having all cars and passenger trucks sold in Canada be zero emissions by 2035, it’s going to have to do something about the cost of these vehicles.

A new survey from BNN Bloomberg and RATESDOTCA has found that cost is the number one reason stopping Canadians from buying an electric car.

The survey, which was conducted by Leger Marketing earlier this month, asked 1,511 Canadians if they were planning to purchase a new electric vehicle in the near future. It found that just over one in four, or 26 per cent of Canadians, are planning to do so, with Atlantic Canada lagging other regions. On the other hand, 19 per cent of Canadians are planning to buy a gas/diesel/hybrid card for their next purchase. 

Those who aren’t planning on buying an EV were asked what the biggest reason for their decision was. By far, it was the price of these vehicles: 31 per cent of this group cited cost as the main reason for not electrifying their ride. Another 59 per cent of respondents cited it as a concern, but not the main one. Other reasons for not wanting to buy an electric vehicle included lack of infrastructure (18 per cent), range concerns (16 per cent), and battery life and replacement (13 per cent), and some report EV shortages and wait times too.

What’s interesting is that it’s clear that government incentives for EVs are the most powerful tool right now to drive adoption, though some argue subsidies are a bad idea for Canada. When asked if further government incentives would convince them to buy an electric vehicle, 78 per cent of those surveyed said yes.

That’s right. If more governments increased the incentives offered for buying electric vehicles, reaching the goal of only selling zero emission vehicles in Canada by 2035 would no longer be a pipe dream, despite 2035 mandate skepticism from some.

At the moment, only Quebec and B.C. offer government incentives to buy an electric vehicle, even as B.C. charging bottlenecks are predicted. The federal government offers up to a $5,000 incentive, with restrictions including a limit on the total price of the vehicle, and has signaled EV sales regulations are forthcoming. Ontario previously offered a rebate of up to $14,000, however, the popular program was cancelled when the Progress Conservative government was elected in 2018.

The cancellation led to a plunge in new electric vehicle sales in Ontario, falling more than 55 per cent in the first six months of 2019 when compared to the same time period in the previous year, according to Electric Mobility Canada.

It’s no surprise that the larger the incentive, the more Canadians will be swayed to buy an electric car. Perhaps what’s surprising is that the incentive doesn’t even have to be as large as the previous Ontario rebate was. The survey found that seven per cent of Canadians would buy an electric vehicle if they got an incentive ranging anywhere from $5,001-$7,250. A full 35 per cent said a $12,500 or higher incentive would convince them.

The majority of Canadians surveyed said they use their vehicles for leisure or commuting to work. Leisure uses include running errands and seeing friends and family, of which 43 per cent of respondents said was the primary way they used their vehicle. Meanwhile, 36 per cent said they primarily used their car to commute to work.

The survey also found that incentives were more effective at convincing younger people to buy an electric vehicle. Eighty-three per cent of those under the age of 55 could be swayed by new incentives. But for those over 55, only 66 per cent said they would change their mind. 

 

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Biden's Climate Law Is Working, and Not Working

Inflation Reduction Act Clean Energy drives EV adoption and renewable power, but grid interconnection, permitting, and supply chain bottlenecks slow wind, solar, and offshore projects, risking emissions targets despite domestic manufacturing growth and tax incentives.

 

Key Points

An IRA push to scale EVs and renewables, meeting EV goals but lagging wind and solar amid grid and permitting delays.

✅ EV sales up 50%, 9.2% of 2023 new cars; growth may moderate.

✅ 32.3 GW added, below 46-79 GW/year needed for climate targets.

✅ Grid, permitting, and supply chain delays bottleneck wind and solar.

 

A year and a half following President Biden's enactment of an ambitious climate change bill, the landscape of the United States' clean energy transition, shaped by 2021 electricity lessons, presents a mix of successes and challenges. A recent study by a consortium of research organizations highlights that while electric vehicle (EV) sales have surged, aligning with the law's projections, the expansion of renewable energy sources like wind and solar has encountered significant hurdles.

The legislation, known as the Inflation Reduction Act, aimed for a dual thrust in America's climate strategy: boosting EV adoption, alongside EPA emission limits, and significantly increasing the generation of electricity from renewable resources. The Act, passed in 2022, was anticipated to propel the United States toward reducing its greenhouse gas emissions by approximately 40 percent from 2005 levels by the end of this decade, backed by extensive financial incentives for clean energy advancements.

Electric vehicle sales have indeed seen a remarkable uptick, with a more than 50 percent increase over the past year, as EV sales surge into 2024 across the market, culminating in EVs comprising 9.2 percent of all new car sales in the United States in 2023. This growth trajectory met the upper range of analysts' predictions post-law enactment, signaling a strong start toward achieving the Act's emission reduction targets.

However, the EV market faces uncertainties regarding the sustainability of this rapid growth. The initial surge in sales was largely driven by early adopters, and the market now confronts challenges such as high prices and limited charging infrastructure, while EVs still trail gas cars in overall market share. Despite these concerns, projections suggest that even a slowdown to 30-40 percent growth in EV sales for 2024 would align with the law's emission goals.

The renewable energy sector's progress is less straightforward. Despite achieving a record addition of 32.3 gigawatts of clean electricity capacity in the past year, the pace falls short of the projected 46 to 79 gigawatts needed annually to meet the United States' climate objectives. While there is potential for about 60 gigawatts of projects in the pipeline for this year, not all are expected to materialize on schedule, indicating a lag in the deployment of new renewable energy sources.

Logistical challenges are a significant barrier to scaling up renewable energy, especially as EV-driven electricity demand rises in the coming years. Lengthy grid connection processes, permitting delays, and local opposition hinder wind and solar project developments. Moreover, ambitious plans for offshore wind farms are hampered by supply chain issues and regulatory constraints.

To achieve the Inflation Reduction Act's ambitious targets, the United States needs to add 70 to 126 gigawatts of renewable capacity annually from 2025 to 2030—a formidable task given the current logistical and regulatory bottlenecks. The analysis underscores the urgency of addressing these non-cost barriers to unlock the full potential of the law's clean energy and emissions reduction ambitions.

In addition to promoting clean energy generation and EV adoption, the Inflation Reduction Act has spurred domestic manufacturing of clean energy technologies. With $44 billion invested in U.S. clean-energy manufacturing last year, this aspect of the law has seen considerable success, and permanent clean energy tax credits are being debated to sustain momentum, demonstrating the Act's capacity to drive economic and industrial transformation.

The law's impact extends to emerging clean energy technologies, offering tax incentives for advanced nuclear reactors, renewable hydrogen production, and carbon capture and storage projects. While these initiatives hold promise for further emissions reductions, their development and deployment are still in the early stages, with tangible outcomes expected in the longer term.

While the Inflation Reduction Act has catalyzed significant strides in certain areas of the United States' clean energy transition, including an EV inflection point in adoption trends, it faces substantial hurdles in fully realizing its objectives. Overcoming logistical, regulatory, and market challenges will be crucial for the nation to stay on course toward its ambitious climate goals, underscoring the need for continued innovation, investment, and policy refinement in the journey toward a sustainable energy future.

 

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'Consumer Reports' finds electric cars really do save money in the long run

Electric Vehicle Ownership Costs include lower maintenance, repair, and fuel expenses; Consumer Reports shows BEV and PHEV TCO beats ICE over 200,000 miles, with per-mile savings compounding through electricity prices and reduced service.

 

Key Points

Lifetime EV expenses, typically lower than ICE, due to cheaper electricity, reduced maintenance, and fewer repairs.

✅ BEV: $0.012/mi to 50k; $0.028/mi after; vs ICE up to $0.06/mi

✅ PHEV: $0.021/mi to 50k; $0.031/mi after; still below ICE

✅ Savings increase over 200k miles from fuel and service reductions

 

Electric vehicles are a relatively new technology, and the EV age is arriving ahead of schedule today. Even though we technically saw the first battery-powered vehicles more than 100 years ago, they haven’t really become viable transportation in the modern world until recently, and they are greener than ever in all 50 states as the grid improves.

As viable as they may now be, however, it still seems they’re unarguably more expensive than their conventional internal-combustion counterparts, prompting many to ask whether it’s time to buy an electric car today. Well, until now.

Lower maintenence costs and the lower price of electricity versus gasoline (see the typical cost to charge an electric vehicle in most regions) actually make electric cars much cheaper in the long run, despite their often higher purchase price, according to a new survey by Consumer Reports. The information was collected using annual reliability surveys conducted by CR in 2019 and 2020.

In the first 50,000 miles (80,500 km), battery electric vehicles cost just US$0.012 per mile for maintenence and repairs, while plug-in hybrid models bump that number up to USD$0.021. Compare these numbers to the typical USD$0.028 cost for internal combustion vehicles, and it becomes clear the more you drive, the more you will save, and across the U.S. plug-ins logged 19 billion electric miles in 2021 to prove the point. After 50,000 miles, the costs for BEV and PHEV vehicles is US$0.028 and US$0.031 respectively, while ICE vehicles jump to US$0.06 per mile.

To put it more practically, if you chose to buy a Model 3 instead of a BMW 330i, you’d see a total US$17,600 in savings over the lifetime of the vehicle, aligning with evidence that EVs are better for the planet and your budget as well, based on average driving. In the SUV sector, buying a Tesla Model Y instead of a Lexus crossover would save US$13,400 (provided the former’s roof doesn’t fly off) and buying a Nissan Leaf over a Honda Civic would save US$6,000 over the lifetime of the vehicles.

CR defines the vehicle’s “lifetime” as 200,000 miles (320,000 km). Ergo the final caveat: while it sounds like driving electric means big savings, you might only see those returns after quite a long period of ownership, though some forecasts suggest that within a decade adoption will be nearly universal for many drivers.

 

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Will Electric Vehicles Crash The Grid?

EV Grid Readiness means utilities preparing the power grid for electric vehicles with smart charging, demand response, V2G, managed load, and renewable integration to maintain reliability, prevent outages, and optimize infrastructure investment.

 

Key Points

EV Grid Readiness is utilities' ability to support mass EV charging with smart load control, V2G, and grid upgrades.

✅ Managed charging shifts load off-peak to reduce stress and costs

✅ V2G enables EVs to supply power and balance renewables

✅ Utilities plan upgrades, rate design, and demand response

 

There's little doubt that the automobile industry is beginning the greatest transformation it has ever seen as the American EV boom gathers pace. The internal combustion engine, the heart of the automobile for over 100 years, is being phased out in favor of battery electric powered vehicles. 

Industry experts know that it's no longer a question of will electric vehicles take over, the only question remaining is how quickly will it happen. If electric vehicle adoption accelerates faster than many have predicted, can the power grid, and especially state power grids across the country, handle the additional load needed to "fuel" tens of millions of EVs?

There's been a lot of debate on this subject, with, not surprisingly, those opposed to EVs predicting doomsday scenarios including power outages, increased electricity rates, and frequent calls from utilities asking customers to stop charging their cars.

There have also been articles written that indicate the grid will be able to handle the increased power demand needed to fuel a fully electric transportation fleet. Some even explain how electric vehicles will actually help grid stability overall, not cause problems.

So we decided to go directly to the source to get answers. We reached out to two industry professionals that aren't just armchair experts. These are two of the many people in the country tasked with the assignment of making sure we don't have problems as more and more electric vehicles are added to the national fleet. 

"Let's be clear. No one is forcing anyone to stop charging their EV." - Eric Cahill, speaking about the recent request by a California utility to restrict unnecessary EV charging during peak demand hours when possible

Both Eric Cahill, who is the Strategic Business Planner for the Sacramento Municipal Utility District in California, and John Markowitz, the Senior Director and Head of eMobility for the New York Power Authority agreed to recorded interviews so we could ask them if the grid will be ready for millions of EVs.  

Both Cahill and Markowitz explained that, while there will be challenges, they are confident that their respective districts will be ready for the additional power demand that electric vehicles will require. It's also important to note that the states that they work in, California and New York, with California expected to need a much bigger grid to support the transition, have both banned the sale of combustion vehicles past 2035. 

That's important because those states have the most aggressive timelines to transition to an all-electric fleet, and internationally, whether the UK grid can cope is a parallel question, so if they can provide enough power to handle the increased demand, other states should be able to also. 

We spoke to both Cahill and Markowitz for about thirty minutes each, so the video is about an hour long. We've added chapters for those that want to skip around and watch select topics. 

We asked both guests to explain what they believe some of the biggest challenges are, including how energy storage and mobile chargers could help, if 2035 is too aggressive of a timeline to ban combustion vehicles, and a number of other EV charging and grid-related questions. 

Neither of our guests seemed to indicate that they were worried about the grid crashing, or that 2035 was too soon to ban combustion vehicles. In fact, they both indicated that, since they know this is coming, they have already begun the planning process, with proper management in place to ensure the lights stay on and there are no major electricity disruptions caused by people charging their cars. 

So check out the video and let us know your thoughts. This has been a hot topic of discussion for many years now. Now that we've heard from the people in charge of providing us the power to charge our EVs, can we finally put the concerns to rest now? As always, leave your comments below; we want to hear your opinions as well.

 

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