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


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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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0 to 180 km in 10 minutes: B.C. Hydro rolls out faster electric vehicle charging

B.C. Hydro fast EV charging stations roll out 180 kW DC fast chargers, power sharing, and rural network expansion in Surrey, Manning Park, Mackenzie, and Tumbler Ridge to ease range anxiety across northern B.C.

 

Key Points

180 kW DC chargers with power sharing, expanding B.C.'s rural EV network to cut range anxiety and speed up recharging.

✅ 180 kW DC fast charging: ~180 km added in about 10 minutes

✅ Power sharing enables two vehicles to use one unit simultaneously

✅ Expands rural charging coverage to cut range anxiety for northern B.C.

 

B.C. Hydro has unveiled plans to install new charging stations it says can add as much as 180 kilometres worth of range to the average electric vehicle in 10 minutes.

The utility says the new 180-kilowatt units will be added to its network, expanding stations in southern B.C. as soon as this fall, with even more scheduled to arrive in 2024.

The first communities to get the new faster-charge stations are Surrey, Manning Park and, north of Prince George, Mackenzie and Tumbler Ridge, while the Lillooet fast-charging site is already operational.

B.C. Hydro president Chris O'Riley says both current and prospective electric vehicle owners have said they want improved coverage in more rural parts of the province in order to address range anxiety, as the utility has warned of a potential EV charging bottleneck if demand outpaces infrastructure.

"We are listening to feedback from our customers," he said.

The new stations will also be the first from B.C. Hydro to offer power sharing, which lets two different vehicles use the same unit to charge at the same time.

The adoption of electric vehicles in B.C. is much higher in southern urban areas than rural, northern ones, according to statistics from the provincial government made available in 2022, as the province leads the country in going electric according to recent reports.

The figures showed about one in every 45 people owns a zero-emission vehicle in the southwest regions of the province, but that number drops to one in 232 in the Kootenays, where the region makes electric cars a priority through local initiatives, and one in 414 in northern B.C.

The number of public charging stations closely corresponds to the number of zero-emission vehicles in various regions.

The Vancouver area has more than 500 fast-charging ports, according to ChargeHub, a website that tracks charging stations in North America. 

In contrast, the route from Prince George to Fort Nelson via Dawson Creek along Highway 97, part of the B.C. Electric Highway network connecting the region — a distance of more than 800 kilometres — has just three locations where a vehicle can be charged to 80 per cent power in an hour or less, creating challenges for people hoping to travel the route.

The disparity is also clear in a just-published analysis from the non-profit Community Energy Association, which acts as an advisory group to government associations. 

It found that while there is roughly one charging port every three square kilometres in Metro Vancouver, the number drops to one every 250 square kilometres in the Regional District of East Kootenay and one every 3,500 square kilometres in the Peace River Regional District, in the province's northeast.

"The more infrastructure we can get across the region ... the more the adoption of electric vehicles will increase," said the association's director of transportation initiatives, Danielle Weiss.

"We are excited to hear that B.C. Hydro is also viewing rural areas as a key focus for their new, enhanced charging technology."

B.C. Hydro says it currently has 153 charging units at 84 locations across the province with plans to add an additional 3,000 ports over the next 10 years, with provincial EV charger rebates supporting home and workplace installations as well.

 

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Space-based solar power, once for science fiction, is gaining interest.

Space-Based Solar Power enables wireless energy transfer from orbital solar arrays, using microwave beaming to rectennas on Earth, delivering clean baseload power beyond weather and night limits, as demonstrated by Caltech and NASA.

 

Key Points

Space-based solar power beams microwaves from arrays to rectennas, delivering clean electricity beyond weather and night.

✅ Caltech demo proved wireless power transfer in space.

✅ Microwaves beam to rectennas for grid-scale clean energy.

✅ Operates above clouds, enabling continuous baseload supply.

 

Ali Hajimiri thinks there’s a better way to power the planet — one that’s not getting the attention it deserves. The Caltech professor of electrical engineering envisages thousands of solar panels floating in space, unobstructed by clouds and unhindered by day-night cycles, effectively generating electricity from the night sky for continuous delivery, wirelessly transmitting massive amounts of energy to receivers on Earth.

This year, that vision moved closer to reality when Mr. Hajimiri, together with a team of Caltech researchers, proved that wireless power transfer in space was possible: Solar panels they had attached to a Caltech prototype in space successfully converted electricity into microwaves and beamed those microwaves to receivers, as a demonstration of beaming power from space to devices about a foot away, lighting up two LEDs.

The prototype also beamed a tiny but detectable amount of energy to a receiver on top of their lab’s building in Pasadena, Calif. The demonstration marks a first step in the wireless transfer of usable power from space to Earth, and advances in low-cost solar batteries could help store and smooth that power flow — a power source that Mr. Hajimiri believes will be safer than direct sun rays. “The beam intensity is to be kept less than solar intensity on earth,” he said.

Finding alternative energy sources is one of the topics that will be discussed by leaders in business, science and public policy, including wave energy, during The New York Times Climate Forward event on Thursday. The Caltech demonstration was a significant moment in the quest to realize space-based solar power, amid policy moves such as a proposed tenfold increase in U.S. solar that would remake the U.S. electricity system — a clean energy technology that has long been overshadowed by other long-shot clean energy ideas, such as nuclear fusion and low-cost clean hydrogen.

If space-based solar can be made to work on a commercial scale, said Nikolai Joseph, a NASA Goddard Space Flight Center senior technology analyst, and integrate with peer-to-peer energy sharing networks, such stations could contribute as much as 10 percent of global power by 2050.

The idea of space-based solar energy has been around since at least 1941, when the science-fiction writer Isaac Asimov set one of his short stories, “Reason,” on a solar station that beamed energy by microwaves to Earth and other planets.

In the 1970s, when a fivefold increase in oil prices sparked interest in alternative energy, NASA and the Department of Energy conducted the first significant study on the topic. In 1995, under the direction of the physicist John C. Mankins, NASA took another look and concluded that investments in space-launch technology were needed to lower the cost and move closer to cheap abundant electricity before space-based solar power could be realized.

“There was never any doubt about it being technically feasible,” said Mr. Mankins, now president of Artemis Innovation Management Solutions, a technology consulting group. “The cost was too prohibitive.”

 

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Canada unveils plan for regulating offshore wind

Canada Offshore Wind Amendments streamline offshore energy regulators in Nova Scotia and Newfoundland and Labrador, enabling green hydrogen, submerged land licences, regional assessments, MPAs standards, while raising fisheries compensation, navigation, and Indigenous consultation considerations.

 

Key Points

Reforms assign offshore wind to joint regulators, enable seabed licensing, and address fisheries and Indigenous issues.

✅ Assigns wind oversight to Canada-NS and Canada-NL offshore regulators

✅ Introduces single submerged land licence and regional assessments

✅ Addresses fisheries, navigation, MPAs, and Indigenous consultation

 

Canada's offshore accords with Nova Scotia and Newfoundland and Labrador are being updated to promote development of offshore wind farms, but it's not clear yet whether any compensation will be paid to fishermen displaced by wind farms.

Amendments introduced Tuesday in Ottawa by the federal government assign regulatory authority for wind power to jointly managed offshore boards — now renamed the Canada-Nova Scotia Offshore Energy Regulator and Canada-Newfoundland and Labrador Offshore Energy Regulator.

Previously the boards regulated only offshore oil and gas projects.

The industry association promoting offshore wind development, Marine Renewables Canada, called the changes a crucial step.

"The tabling of the accord act amendments marks the beginning of, really, a new industry, one that can play a significant role in our clean energy future," said  Lisen Bassett, a spokesperson for Marine Renewables Canada. 

Nova Scotia's lone member of the federal cabinet, Immigration Minister Sean Fraser, also talked up prospects at a news conference in Ottawa.


'We have lots of water'

"The potential that we have, particularly when it comes to offshore wind and hydrogen is extraordinary," said Fraser.

"There are real projects, like Vineyard Wind, with real investors talking about real jobs."

Sharing the stage with assembled Liberal MPs from Nova Scotia and Newfoundland and Labrador was Nova Scotia Environment Minister Tim Halman, representing a Progressive Conservative government in Halifax.

"If you've ever visited us or Newfoundland, you know we have lots of water, you know we have lots of wind, and we're gearing up to take advantage of those natural resources in a clean, sustainable way. We're paving the way for projects such as offshore wind, tidal energy in Nova Scotia, and green hydrogen production," said Halman.

Before a call for bids is issued, authorities will identify areas suitable for development, conservation or fishing.

The legislation does not outline compensation to fishermen excluded from offshore areas because of wind farm approvals.


Regional assessments

Federal officials said potential conflicts can be addressed in regional assessments underway in both provinces.

Minister of Natural Resources of Canada Jonathan Wilkinson said fisheries and navigation issues will have to be dealt with.

"Those are things that will have to be addressed in the context of each potential project. But the idea is obviously to ensure that those impacts are not significant," Wilkinson said.

Speaking after the event, Christine Bonnell-Eisnor, chair of what is still called the Canada Nova Scotia Offshore Petroleum Board, said what compensation — if any — will be paid to fishermen has yet to be determined.

"It is a question that we're asking as well. Governments are setting the policy and what terms and conditions would be associated with a sea bed licence. That is a question governments are working on and what compensation would look like for fishers."

Scott Tessier, who chairs  the Newfoundland Board, added "the experience has been the same next door in Nova Scotia, the petroleum sector and the fishing sector have an excellent history of cooperation and communication and I don't expect it look any different for offshore renewable energy projects."


Nova Scotia in a hurry to get going

The legislation says the offshore regulator would promote compensation schemes developed by industry and fishing groups linked to fishing gear.

Nova Scotia is in a hurry to get going.

The Houston government has set a target of issuing five gigawatts of licences for offshore wind by 2030, with leasing starting in 2025, reflecting momentum in the U.S. offshore wind market as well. It is intended largely for green hydrogen production. That's almost twice the province's peak electricity demand in winter, which is 2.2 gigawatts.

The amendments will streamline seabed approvals by creating a single "submerged land" licence, echoing B.C.'s streamlined process for clean energy projects, instead of the exploration, significant discovery and production licences used for petroleum development.

Federal and provincial ministers will issue calls for bids and approve licences, akin to BOEM lease requests seen in the U.S. market.

The amendments will ensure Marine Protected Area's  (MPAs) standards apply in all offshore areas governed by the regulations.


Marine protected areas

Wilkinson suggested, but declined, three times to explicitly state that offshore wind farms would be excluded from within Marine Protected Areas.

After this story was initially published on Tuesday, Natural Resources Canada sent CBC a statement indicating offshore wind farms may be permitted inside MPAs.

Spokesperson Barre Campbell noted that all MPAs established in Canada after April 25, 2019, will be subject to the Department of Fisheries and Oceans new standards that prohibit key industrial activities, including oil and gas exploration, development and production.

"Offshore renewable energy activities and infrastructure are not key industrial activities," Campbell said in a statement.

"Other activities may be prohibited, however, if they are not consistent with the conservation objectives that are established by the relevant department that has or that will establish a marine protected area."


Federal impact assessment process

The new federal impact assessment process will apply in offshore energy development, and recent legal rulings such as the Cornwall wind farm decision highlight how courts can influence project timelines.

For petroleum projects, future significant discovery licences will be limited to 25 years replacing the current indefinite term.

Existing significant discovery licences have been an ongoing exception and are not subject to the 25-year limit. Both offshore energy regulators will be given the authority to fulfil the Crown's duty to consult with Indigenous peoples

 

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Clean Energy Accounts for 50% of Germany's Electricity

Germany Renewable Energy Milestone marks renewables supplying 53% of power, with record onshore wind and peak solar; hydrogen-ready gas plants and grid upgrades are planned to balance variability amid Germany's coal phase-out.

 

Key Points

It marks renewables supplying 53% of Germany's power, driven by wind and solar records in the energy transition.

✅ 53% of generation and 52% of consumption in 2024

✅ Onshore wind hit record; June solar peaked

✅ 24 GW hydrogen-ready gas plants planned for grid balancing

 

For the first time, renewable energy sources have surpassed half of Germany's electricity production this year, as indicated by data from sustainable energy organizations.

Preliminary figures from the Center for Solar Energy and Hydrogen Research alongside the German Association of Energy and Water Industries (BDEW) show that the contribution of green energy has risen to 53%, echoing how renewable power surpassed fossil fuels in Europe recently, a significant increase from 44% in the previous year.

The year saw a record output from onshore wind energy, as investments in European wind power climbed, and an unprecedented peak in solar energy production in June, as reported by the organizations. Additionally, renewable sources constituted 52% of Germany's total power consumption, marking an increase of approximately five percentage points.

Germany, Europe's leading economy, heavily impacted by Russia's reduced natural gas supplies last year, as Europeans push back from Russian oil and gas across the region, has been leaning on renewable sources to bridge the energy gap. This shift comes even as the country temporarily ramped up coal usage last winter. Having phased out its nuclear power plants earlier this year, Germany aims for an 80% clean energy production by 2030.

In absolute numbers, Germany produced a record level of renewable energy this year, supported by a solar power boost during the energy crisis, approximately 267 billion kilowatt-hours, according to the associations. A decrease of 11% in overall energy production facilitated a reduced reliance on fossil fuels.

However, Europe's transition to more sustainable energy sources, particularly offshore wind, has encountered hurdles such as increased financing and component costs, even as neighbors like Ireland pursue an ambitious green electricity goal within four years. Germany continues to face challenges in expanding its renewable energy capacity, as noted by BDEW’s executive board chairwoman, Kerstin Andreae.

Andreae emphasizes that while energy companies are eager to invest in the transition, they often encounter delays due to protracted approval processes, bureaucratic complexities, and scarcity of land despite legislative improvements.

German government officials are close to finalizing a strategy this week for constructing multiple new gas-fired power plants, despite findings that solar plus battery storage can be cheaper than conventional power in Germany, a plan estimated to cost around 40 billion euros ($44 billion). This initiative is a critical part of Germany's strategy to mitigate potential power shortages that might result from the discontinuation of coal power, particularly given the variability in renewable energy sources.

A crucial meeting involving representatives from the Economy and Finance Ministries, along with the Chancellor's Office, is expected to occur late Tuesday. The purpose is to finalize this agreement, according to sources who requested anonymity due to restrictions on public disclosure.

The Economy Ministry, spearheading this project, confirmed that intensive discussions are ongoing, although no further details were disclosed.

Germany's plan involves utilizing approximately 24 gigawatts (GW) of energy from hydrogen, including emerging offshore green hydrogen options, and gas-fired power plants to compensate for the fluctuations in wind and solar power generation. However, the proposal has faced challenges, particularly regarding the allocation of public funds for these projects, with disagreements arising with the European Union's executive in Brussels.

Environmental groups have also expressed criticism of the strategy. They advocate for an expedited end to fossil fuel usage and remain skeptical about the energy sector's arguments favoring natural gas as a transitional fuel. Despite natural gas emitting less carbon dioxide than coal, environmentalists question its role in Germany's energy future.

 

 

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Biden seen better for Canada’s energy sector

Biden Impact on Canadian Energy Exports highlights shifts in trade policy, tariffs, carbon pricing, and Keystone XL, with implications for aluminum, softwood lumber, electricity trade, fracking limits, and small modular nuclear reactors.

 

Key Points

How Biden-era trade, climate rules, and tariffs may reshape Canadian energy and exports.

✅ Reduced tariff volatility and friendlier trade policy toward allies

✅ Climate alignment: carbon pricing, clean power, cross-border electricity

✅ Potential gains for oil, gas, aluminum, and softwood lumber exporters

 

There is little doubt among industry associations, the Conference Board of Canada and C.D. Howe Institute that a Joe Biden White House will be better for Canadian resource and energy exporters – even Alberta’s beleaguered oil industry, despite Biden’s promise to kill the Keystone XL pipeline.

The consensus among industry observers in the lead-up to the November 3 U.S. presidential election was that a re-elected Donald Trump would become even more pugnacious on trade and protectionism, putting electricity exports at risk for Canadian utilities, which would be bad for Canadian exporters. The Justin Trudeau government would likely come under increased pressure to lower Canadian business taxes to compete with Trump’s low-tax climate.

“A Joe Biden victory would likely lead to higher taxes for both corporations and wealthy Americans to help pay down the gigantic fiscal deficit that is currently running at plus-US$5 trillion,” the conference board concluded in a recent analysis.

On trade and tariffs, the conference board said: “Many but not all of these ongoing trade disputes would wither away under a Joe Biden administration. He would likely run a broad trade policy favouring strategic allies like Canada.

While Canadian industries like forestry and aluminum smelting benefited from strong demand and prices in the U.S. under Trump, the forced renegotiation of the North American Free Trade Agreement failed end tariffs and duties on things like softwood lumber and aluminum ingots, even as Canadians backed tariffs on energy and minerals during the dispute.

The uncertainty over trade issues, and Trump’s tax cuts, which made Canada’s tax regime less competitive, have contributed to a period of low business investment in Canada during Trump's presidency.

“For Canada, we’ve seen a period, since this administration has been in power, where investment has eroded steadily,” conference board chief economist Pedro Antunes said. “We are not doing well at all, in terms of private capital investment in Canada.”

Alberta’s oil industry has been hit particularly hard, with a slew of divestments by big energy giants, and cancellations of major projects, like the $20 billion Frontier oilsands project, scrubbed by Teck Resources.

While domestic policies and global market forces are partly to blame for falling investments in Canada’s oil and gas sector, up until the pandemic hit, investment in oil and gas increased significantly in the U.S., while declining in Canada, during Trump’s first term.

Biden is also expected to level the playing field with respect to climate change policies. Canadian industries pay carbon taxes and face regulations that their counterparts in the U.S. don’t. That has disadvantaged energy-intensive, trade-exposed industries like mines and pulp mills in Canada.

“With Biden in office, Canada will once again have a partner at the federal level in the states in the transition to a decarbonized economy,” said Josha MacNab, national policy director for the Pembina Institute.

Biden’s policies might also favour importing aluminum, cross-laminated timber, fuel cells and other lower-carbon products and commodities from Canada.

At least one observer believes that Canada’s oil and gas sector might benefit more from a Biden White House, despite Biden’s pledge to kill the Keystone XL pipeline.

“I think Joe Biden could be very good for Alberta,” Christopher Sands, director of the Wilson International Center’s Canada Institute, said in a recent discussion hosted by the C.D. Howe Institute.

Sands added that the presidential permit Biden has promised to tear up on the Keystone XL pipeline project is a construction permit, not an operating permit.

“The segment of that pipeline that crosses the U.S.-Canada border, which is the only place that the presidential permit applies, has been built,” Sands said. “So I think that’s somewhat of an empty threat.”

He added that, if Biden bans fracking on federal lands, as he has promised, and implements other restrictions that make it more costly for American oil and gas producers, it might increase the demand for Canadian oil and gas in the U.S. The demand would be highest in the U.S. Midwest, which depends largely on Marcellus Shale production, notably in Pennsylvania, and Western Canada for its oil and gas.

One of the Canadian industries directly affected by the Trump administration was aluminum smelting, which is relevant for B.C. because Rio Tinto plc’s Kitimat smelter exports aluminum to the U.S.

Jean Simard, president of the Aluminum Association of Canada, said one of Trump’s legacies was the reactivation of a little-used mechanism – Section 232 of the Trade Expansion Act – to hit Canada and other countries, notably China, with import tariffs.

The 10 per cent tariffs on aluminum cost Canadian aluminum producers US$15 million in the month of August alone, Simard said.

The Trump administration eventually exempted Canadian aluminum exports from the tariffs, then reintroduced them, and then, one week before the election, exempted them again.

These on-again, off-again tariff threats create tremendous uncertainty, not just for Canadian producers, but also for U.S. buyers. That kind of uncertainty is likely to ease under a Biden presidency.

Simard said Biden’s track record suggests he is well-disposed towards Canada and less confrontational with allies and trade partners in general, and some in Washington have called for a stronger U.S.-Canada energy partnership as well.

Meanwhile, softwood lumber tariffs have been imposed by Democrats and Republicans alike. But there are compelling reasons for ending the Canada-U.S. softwood lumber war.

Home renovation and repair in the United States has done surprisingly well during the pandemic.

As a result of sawmill curtailments in the U.S. due to pandemic restrictions and high demand for lumber in the U.S. housing sector, North American lumbers prices broke records this summer, soaring as high as US$900 per thousand board feet.

“It shows that there’s very strong demand for our product,” said Susan Yurkovich, president of the Council of Forest Industries.

Ultimately, the duties Canadian lumber exporters pay are passed on to U.S. consumers.

Sands said Biden’s climate action pledges, including a clean electricity standard, could increase opportunities for trading electricity between Canada in the U.S., as the U.S. increasingly looks to Canada for green power, and could also be good for Canadian nuclear power technology.

Strong climate change policies necessarily result in an increased demand for low-carbon electricity, and advancing clean grids, which Canada has in abundance, thanks to both hydro and nuclear power.

“[Biden] does share the desire to act on climate change, but unlike some of his fellow party members who are more signed on to a Green New Deal, he’s open to pragmatic solutions that might get the job done quickly and efficiently,” Sands said.

“This is a huge opportunity for small, modular nuclear reactors, and Atomic Energy Canada has some great designs. There’s a real opportunity for a nuclear revival.” 

 

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Most planned U.S. battery storage additions in next three years to be paired with solar

U.S. Solar-Plus-Storage Growth 2021-2024 highlights rising battery storage co-location with solar PV, grid flexibility, RTO/ISO market signals, and ITC incentives, enabling peak shaving, firming renewable output, and reliable night-time power.

 

Key Points

Summary of U.S. plans pairing battery storage with solar PV, guided by RTO/ISO markets, grid needs, and ITC policy.

✅ 9.4 GW (63%) co-located with solar PV by 2024

✅ 97% of standalone capacity sited in RTO/ISO regions

✅ ITC improves project economics and grid services revenue

 

Of the 14.5 gigawatts (GW) of battery storage power capacity planned to come online amid anticipated growth in solar and storage in the United States from 2021 to 2024, 9.4 GW (63%) will be co-located with a solar photovoltaic (PV) solar-plus-storage power plant, based on data reported to us and published in our Annual Electric Generator Report. Another 1.3 GW of battery storage will be co-located at sites with wind turbines or fossil fuel-fired generators, such as natural gas-fired plants. The remaining 4.0 GW of planned battery storage will be located at standalone sites.

Historically, most U.S. battery systems have been located at standalone sites. Of the 1.5 GW of operating battery storage capacity in the United States at the end of 2020, 71% was standalone, and 29% was located onsite with other power generators.

Most standalone battery energy storage sites have been planned or built in power markets that are governed by regional transmission organizations (RTOs) and independent system operators (ISOs). RTOs and ISOs can enforce standard market rules that lay out clear revenue streams for energy storage projects in their regions, which promotes the deployment of battery storage systems. Of the utility-scale pipeline battery systems announced to come online from 2021 to 2024, 97% of the standalone battery capacity and 60% of the co-located battery capacity are in RTO/ISO regions.

Over 90% of the planned battery storage capacity outside of RTO and ISO regions will be co-located with a solar PV plant. At some solar PV co-located plants, the batteries can charge directly from the onsite solar generator when electricity demand and prices are low. They can then discharge electricity to the grid when peak demand is higher or when solar generation is unavailable, such as at night.

Although factors such as cloud cover can affect solar generation output, solar generators, now the number three renewable source in the U.S., in particular can effectively pair with battery storage because of their relatively regular daily generation patterns. This predictability works well with battery systems because battery systems are limited in how long they can discharge their power capacity before needing to recharge. If paired with a wind turbine, for example, a battery system could go days before having the opportunity to fully recharge.

Another advantage of pairing batteries with renewable generators is the ability to take advantage of tax incentives such as the Investment Tax Credit (ITC), which is available for solar projects, and other favorable government plans supporting deployment.

 

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