California Takes the Lead in Electric Vehicle and Charging Station Adoption


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California EV Adoption leads the U.S., with 37% of registered electric vehicles and 27% of charging locations, spanning Level 1, Level 2, and DC Fast stations, aligned with OCPI and boosted by CALeVIP funding.

 

Key Points

California EV adoption reflects the state's leading EV registrations and growth in private charging infrastructure.

✅ 37% of U.S. EVs, 27% of charging locations in 2022

✅ CALeVIP funding boosts public charging deployment

✅ OCPI-aligned data; EVs per charger rose to 75 in CA

 

California has consistently been at the forefront of electric vehicle (EV) adoption, with EV sales topping 20% in California underscoring this trend, and the proliferation of EV charging stations in the United States, maintaining this position since 2016. According to recent estimates from our State Energy Data System (SEDS), California accounts for 37% of registered light-duty EVs in the U.S. and 27% of EV charging locations as of the end of 2022.

The vehicle stock data encompass all registered on-road, light-duty vehicles and exclude any previous vehicle sales no longer in operation. The data on EV charging locations include both private and public access stations for Legacy, Level 1, Level 2, and DC Fast charging ports, excluding EV chargers in single-family residences. There is a data series break between 2020 and 2021, when the U.S. Department of Energy updated its data to align with the Open Charge Point Interface (OCPI) international standard, reflecting changes in the U.S. charging infrastructure landscape.

In 2022, the number of registered EVs in the United States, with U.S. EV sales soaring into 2024 nationwide, surged to six times its 2016 figure, growing from 511,600 to 3.1 million, while the number of U.S. charging locations nearly tripled, rising from 19,178 to 55,015. Over the same period, California saw its registered EVs more than quadruple, jumping from 247,400 to 1.1 million, and its charging locations tripled, increasing from 5,486 to 14,822.

California's share of U.S. EV registrations has slightly decreased in recent years as EV adoption has spread across the country, with Arizona EV ownership relatively high as well. In 2016, California accounted for approximately 48% of light-duty EVs in the United States, which was approximately 12 times more than the state with the second-highest number of EVs, Georgia. By 2022, California's share had decreased to around 37%, which was still approximately six times more than the state with the second-most EVs, Florida.

On the other hand, California's share of U.S. EV charging locations has risen slightly in recent years, as charging networks compete amid federal electrification efforts and partly due to the California Electric Vehicle Infrastructure Project (CALeVIP), which provides funding for the installation of publicly available EV charging stations. In 2016, approximately 25% of U.S. EV charging locations were in California, over four times as many as the state with the second-highest number, Texas. In 2022, California maintained its position with over four times as many EV charging locations as the state with the second-most, New York.

The growth in the number of registered EVs has outpaced the growth of EV charging locations in the United States, and in 2021 plug-in vehicles traveled 19 billion electric miles nationwide, underscoring utilization. In 2016, there were approximately 27 EVs per charging location on average in the country. Alaska had the highest ratio, with 67 EVs per charging location, followed by California with 52 vehicles per location.

In 2022, the average ratio was 55 EVs per charging location in the United States, raising questions about whether the grid can power an ongoing American EV boom ahead. New Jersey had the highest ratio, with 100 EVs per charging location, followed by California with 75 EVs per location.

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Why Electric Vehicles Are "Greener" Than Ever In All 50 States

UCS EV emissions study shows electric vehicles produce lower life-cycle emissions than gasoline cars across all states, factoring tailpipe, grid mix, power plant sources, and renewable energy, delivering mpg-equivalent advantages nationwide.

 

Key Points

UCS study comparing EV and gas life-cycle emissions, finding EVs cleaner than new gas cars in every U.S. region.

✅ Average EV equals 93 mpg gas car on emissions.

✅ Cleaner than 50 mpg gas cars in 97% of U.S.

✅ Regional grid mix included: tailpipe to power plant.

 

One of the cautions cited by electric vehicle (EV) naysayers is that they merely shift emissions from the tailpipe to the local grid’s power source, implicating state power grids as a whole, and some charging efficiency claims get the math wrong, too. And while there is a kernel of truth to this notion—they’re indeed more benign to the environment in states where renewable energy resources are prevalent—the average EV is cleaner to run than the average new gasoline vehicle in all 50 states. 

That’s according to a just-released study conducted the Union of Concerned Scientists (UCS), which determined that global warming emissions related to EVs has fallen by 15 percent since 2018. For 97 percent of the U.S., driving an electric car is equivalent or better for the planet than a gasoline-powered model that gets 50 mpg. 

In fact, the organization says the average EV currently on the market is now on a par, environmentally, with an internal combustion vehicle that’s rated at 93 mpg. The most efficient gas-driven model sold in the U.S. gets 59 mpg, and EV sales still trail gas cars despite such comparisons, with the average new petrol-powered car at 31 mpg.

For a gasoline car, the UCS considers a vehicle’s tailpipe emissions, as well as the effects of pumping crude oil from the ground, transporting it to a refinery, creating gasoline, and transporting it to filling stations. For electric vehicles, the UCS’ environmental estimates include both emissions from the power plants themselves, along with those created by the production of coal, natural gas or other fossil fuels used to generate electricity, and they are often mischaracterized by claims about battery manufacturing emissions that don’t hold up. 

Of course the degree to which an EV ultimately affects the atmosphere still varies from one part of the country to another, depending on the local power source. In some parts of the country, driving the average new gasoline car will produce four to eight times the emissions of the average EV, a fact worth noting for those wondering if it’s the time to buy an electric car today. The UCS says the average EV driven in upstate New York produces total emissions that would be equivalent to a gasoline car that gets an impossible 255-mpg. In even the dirtiest areas for generating electricity, EVs are responsible for as much emissions as a conventionally powered car that gets over 40 mpg.

 

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Harbour Air's electric aircraft a high-flying example of research investment

Harbour Air Electric Aircraft Project advances zero-emission aviation with CleanBC Go Electric ARC funding, converting seaplanes to battery-electric power, cutting emissions, enabling commercial passenger service, and creating skilled clean-tech jobs through R&D and electrification.

 

Key Points

Harbour Air's project electrifies seaplanes with CleanBC ARC support to enable zero-emission flights and cut emissions.

✅ $1.6M CleanBC ARC funds seaplane electrification retrofit

✅ Target: passenger-ready, zero-emission commercial service

✅ Creates 21 full-time clean-tech jobs in British Columbia

 

B.C.’s Harbour Air Seaplanes is building on its work in clean technology to decarbonize aviation, part of an aviation revolution underway, and create new jobs with support from the CleanBC Go Electric Advanced Research and Commercialization (ARC) program.

”Harbour Air is decarbonizing aviation and elevating the company to new altitudes as a clean-technology leader in B.C.'s transportation sector,” said Bruce Ralston, Minister of Energy, Mines and Low Carbon Innovation. “With support from our CleanBC Go Electric ARC program, Harbour Air's project not only supports our emission-reduction goals, but also creates good-paying clean-tech jobs, exemplifying the opportunities in the low-carbon economy.”

Harbour Air is receiving almost $1.6 million from the CleanBC Go Electric ARC program for its aircraft electrification project. The funding supports Harbour Air’s conversion of an existing aircraft to be fully electric-powered and builds on its successful December 2019 flight of the world’s first all-electric commercial aircraft, and subsequent first point-to-point electric flight milestones.

That flight marked the start of the third era in aviation: the electric age. Harbour Air is working on a new design of the electric motor installation and battery systems to gain efficiencies that will allow carrying commercial passengers, as it eyes first electric passenger flights in 2023. Approximately 21 full-time jobs will be created and sustained by the project.

“CleanBC is helping accelerate world-leading clean technology and innovation at Harbour Air that supports good jobs for people in our communities,” said George Heyman, Minister of Environment and Climate Change Strategy. “Once proven, the technology supports a switch from fossil fuels to advanced electric technology, and will provide a clean transportation option, such as electric ferries, that reduces pollution and shows the way forward for others in the sector.”

Harbour Air is a leader in clean-technology adoption. The company has also purchased a fully electric, zero-emission passenger shuttle bus to pick up and drop off passengers between Harbour Air’s downtown Vancouver and Richmond locations, and the Vancouver International Airport, where new EV chargers support travellers.

“It is great to see the Province stepping up to support innovation,” said Greg McDougall, Harbour Air CEO and ePlane test pilot. “This type of funding confirms the importance of encouraging companies in all sectors to focus on what they can be doing to look at more sustainable practices. We will use these resources to continue to develop and lead the transportation industry around the world in all-electric aviation.”

In total, $8.18 million is being distributed to 18 projects from the second round of CleanBC Go Electric ARC program funding. Recipients include Damon Motors and IRDI System, both based on the Lower Mainland. The 15 other successful projects will be announced this year.

The CleanBC Go Electric ARC program supports the electric vehicle (EV) sector in B.C., which leads the country in going electric, by providing reliable and targeted support for research and development, commercialization and demonstration of B.C.-based EV technologies, services and products.

“This project is a great example of the type of leading-edge innovation and tech advancements happening in our province,” said Brenda Bailey, Parliamentary Secretary for Technology and Innovation. “By further supporting the development of the first all-electric commercial aircraft, we are solidifying our position as world leaders in innovation and using technology to change what is possible.”

The CleanBC Roadmap to 2030 is B.C.’s plan to expand and accelerate climate action, including a major hydrogen project, building on the province’s natural advantages – abundant, clean electricity, high-value natural resources and a highly skilled workforce. It sets a path for increased collaboration to build a British Columbia that works for everyone.

 

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Canada's largest electricity battery storage project coming to southwestern Ontario

Oneida Energy Storage Project, a 250 MW lithium-ion battery in Haldimand County, enhances Ontario's clean energy capacity, grid reliability, and peak demand management, developed with Six Nations partners and private-public collaboration.

 

Key Points

A 250 MW lithium-ion battery in Ontario storing power to stabilize the grid and deliver clean electricity.

✅ 250 MW lithium-ion grid-scale battery in Haldimand County

✅ Developed with Six Nations, Northland Power, NRStor, Aecon

✅ Enhances grid reliability, peak shaving, emissions reduction

 

The Ontario government announced it is working to build Canada's largest electricity battery storage project in Haldimand County, part of Ontario's push into energy storage amid a looming supply crunch. Ontario Premier Doug Ford and Deputy Prime Minister Chrystia Freeland made the announcement in Ohsweken, Ont.

The 250-megawatt Oneida Energy storage project is being developed in partnership with the Six Nations of the Grand River Development Corporation, Northland Power, NRStor and Aecon Group.

The Ontario government announced on Friday it is working to build Canada's largest electricity battery storage project in Haldimand County.

On Friday, Ontario Premier Doug Ford and Deputy Prime Minister Chrystia Freeland made the announcement in Ohsweken, Ont.

The 250-megawatt Oneida Energy storage project is being developed in partnership with the Six Nations of the Grand River Development Corporation, Northland Power, NRStor and Aecon Group.

“It will more than double the province's energy storage resources and provide enough electricity to power a city approximately the size of Oshawa,” said Ford, noting Ontario's growing battery storage expansion across the grid.

“We need to continue to find ways to keep our energy clean and green,” said Ford, including initiatives like the Hydrogen Innovation Fund to spur innovation.

The federal government said they are providing a further $50 million in funding, coinciding with national investments such as the B.C. battery plant to scale capacity.

The premier said the project will begin operating in 2025 and will more than double the amount of clean energy storage.

Officials with the Six Nations said they have invested in the project that will provide economic returns and 97 per cent of the construction workforce to build it.

"This project is an example of what is possible when private and public companies, multiple levels of government, and their agencies work alongside a progressive Indigenous partner in pursuit of innovative solutions,” said Matt Jamieson, President and CEO of Six nations of the Grand River Development Corporation. “As with all our development efforts, we have studied the project to ensure it aligns with our community values, we are confident the outcome will create ratepayer savings, and move us closer to a Net Zero future for our coming generations."

According to the province, it has directed the independent electricity system operator to enter into a 20-year contract for this project with a goal to grow the province's clean energy supply, alongside transmission efforts like the Lake Erie Connector to enhance reliability.

The province said the Oneida Energy storage project is expected to reduce emissions by between 2.2 to 4.1 million tonnes, the equivalent to taking up to 40,000 cars off the road.

The project will use large scale lithium batteries, with regional supply bolstered by the Niagara battery plant, to store surplus energy from the power grid then feed it back into the system when it’s needed.

“Power that is generated and it can’t be utilized, this system will help harness that, store it for a period of time, and it will maximize value for the rate payer,” said Jamieson.

Jamieson said he is proud that the Six Nations is a founding developer in the project.

The facility will not actually be in Six Nations. It will be near the community of Jarvis in Haldimand County.
For Six Nationals elected Chief Mark Hill, it’s a major win as Ontario's EV sector grows with the Oakville EV deal and related projects.

“We want to continue to be a driver. We want to show Canada that we can also be a part of green solution,” Hill said.

But Hill admitted the Six Nations Community remains deeply divided over a number of longstanding issues.

“We still have a lot of internal affairs within our own community that we have to deal with. I think it’s really time once and for all to come together and figure this out,” said Hill.

The traditional leadership said they were left out of the decision making.

“No voice of ours was even heard today in that building,” said Deyohowe:to, the chief of the Cayuga Snipe Clan.

According to the Cayuga Snipe Clan, consultation with the Haudenasauene council is required for this type of development but they said it didn't happen.

“We’ve never heard of this before. No one came to the community and said this was going to happen and for the community we are not going to let that happen,” said Deyohowe:to.

The Six Nations Development Corporation said it did reach out to the Haudenosaunee chiefs and sent multiple letters in 2021 inviting them to participate.

 

 

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More than half of new U.S. electric-generating capacity in 2023 will be solar

U.S. 2023 Utility-Scale Capacity Additions highlight surging solar power, expanding battery storage, wind projects, natural gas plants, and new nuclear reactors, boosting grid reliability in Texas and California with record planned installations.

 

Key Points

Planned grid expansions led by solar and battery storage, with wind, natural gas, and nuclear increasing U.S. capacity.

✅ 29.1 GW solar planned; Texas and California lead installations.

✅ 9.4 GW battery storage to more than double current capacity.

✅ Natural gas, wind, and 2.2 GW nuclear round out additions.

 

Developers plan to add 54.5 gigawatts (GW) of new utility-scale electric-generating capacity to the U.S. power grid in 2023, according to our Preliminary Monthly Electric Generator Inventory. More than half of this capacity will be solar power (54%), even as coal generation increase has been reported, followed by battery storage (17%).

 

Solar

U.S. utility-scale solar capacity has been rising rapidly EIA summer outlook since 2010. Despite its upward trend over the past decade 2018 milestone, additions of utility-scale solar capacity declined by 23% in 2022 compared with 2021. This drop in solar capacity additions was the result of supply chain disruptions and other pandemic-related challenges. We expect that some of those delayed 2022 projects will begin operating in 2023, when developers plan to install 29.1 GW of solar power in the United States. If all of this capacity comes online as planned, 2023 will have the most new utility-scale solar capacity added in a single year, more than doubling the current record (13.4 GW in 2021).

In 2023, the most new solar capacity, by far, will be in Texas (7.7 GW) and California (4.2 GW), together accounting for 41% of planned new solar capacity.

 

Battery storage

U.S. battery storage capacity has grown rapidly January generation jump over the past couple of years. In 2023, U.S. battery capacity will likely more than double. Developers have reported plans to add 9.4 GW of battery storage to the existing 8.8 GW of battery storage capacity.

Battery storage systems are increasingly installed with wind and solar power projects. Wind and solar are intermittent sources of generation; they only produce electricity when the wind is blowing or the sun is shining. Batteries can store excess electricity from wind and solar generators for later use. In 2023, we expect 71% of the new battery storage capacity will be in California and Texas, states with significant solar and wind capacity.

 

Natural gas

Developers plan to build 7.5 GW of new natural-gas fired capacity record natural gas output in 2023, 83% of which is from combined-cycle plants. The two largest natural gas plants expected to come online in 2023 are the 1,836 megawatt (MW) Guernsey Power Station in Ohio and the 1,214 MW CPV Three Rivers Energy Center in Illinois.

 

Wind

In 2023, developers plan to add 6.0 GW of utility-scale wind capacity, as renewables poised to eclipse coal in global power generation. Annual U.S. wind capacity additions have begun to slow, following record additions of more than 14 GW in both 2020 and 2021.

The most wind capacity will be added in Texas in 2023, at 2.0 GW. The only offshore wind capacity expected to come online this year is a 130.0 MW offshore windfarm in New York called South Fork Wind.

 

Nuclear

Two new nuclear reactors at the Vogtle nuclear power plant in Georgia nuclear and net-zero are scheduled to come online in 2023, several years later than originally planned. The reactors, with a combined 2.2 GW of capacity, are the first new nuclear units built in the United States in more than 30 years.

Developers and power plant owners report planned additions to us in our annual and monthly electric generator surveys. In the annual survey, we ask respondents to provide planned online dates for generators coming online in the next five years. The monthly survey tracks the status of generators coming online based on reported in-service dates.

 

 

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California introduces new net metering regime

California NEM-3 Tariff ushers a successor Net Energy Metering framework, revising export compensation, TOU rates, and non-bypassable charges to balance ratepayer impacts, rooftop solar growth, and energy storage adoption across diverse communities.

 

Key Points

The CPUC's successor NEM policy redefining export credits and rates to sustain customer-sited solar and storage.

✅ Sets export compensation methodology beyond NEM 2.0

✅ Aligns TOU rates and non-bypassable charges with costs

✅ Encourages solar-plus-storage adoption and equity access

 

The California Public Utilities Commission (CPUC) has officially commenced its “NEM-3” proceeding, which will establish the successor Net Energy Metering (NEM) tariff to the “NEM 2.0” program in California. This is a highly anticipated, high-stakes proceeding that will effectively modify the rules for the NEM tariff in California, amid ongoing electricity pricing changes that affect residential rooftop solar – arguably the single most important policy mechanism for customer-sited solar over the last decade.

The CPUC’s recent order instituting rule-making (OIR) filing stated that “the major focus of this proceeding will be on the development of a successor to existing NEM 2.0 tariffs. This successor will be a mechanism for providing customer-generators with credit or compensation for electricity generated by their renewable facilities that a) balances the costs and benefits of the renewable electrical generation facility and b) allows customer-sited renewable generation to grow sustainably among different types of customers and throughout California’s diverse communities.”

This successor tariff proceeding was initiated by Assembly Bill 327, which was signed into law in October of 2013. AB 327 is best known as the legislation that directed the CPUC to create the “NEM 2.0” successor tariff, which was adopted by the CPUC in January of 2016.

The original Net Energy Metering program in California (“NEM 1.0”) effectively enabled full-retail value net metering “allowing NEM customers to be compensated for the electricity generated by an eligible customer-sited renewable resource and fed back to the utility over an entire billing period.” Under the NEM 2.0 tariff, customers were required to pay charges that aligned them more closely with non-NEM customer costs than under the original structure. The main changes adopted when the NEM 2.0 was implemented were that NEM 2.0 customer-generators must: (i) pay a one-time interconnection fee; (ii) pay non-bypassable charges on each kilowatt-hour of electricity they consume from the grid; and (iii) customers were required to transfer to a time-of-use (TOU) rate, with potential changes to electric bills for many customers.

NEM 2.0

The commencement of the NEM-3 OIR was preceded by the publishing of a 318-page Net Energy Metering 2.0 Lookback Study, which was published by Itron, Verdant Associates, and Energy and Environmental Economics. The CPUC-commissioned study had been widely anticipated and was expected to act as the starting reference point for the successor tariff proceeding. Verdant also hosted a webinar, which summarized the study’s inputs, assumptions, draft findings and results.

The study utilized several different tests to study the impact of NEM 2.0. The cost effectiveness analysis tests, which estimate costs and benefits attributed to NEM 2.0 include: (i) total resource cost test, (ii) participant cost test, (iii) ratepayer impact measure test, and (iv) program administrator test. The evaluation also included a cost of service analysis, which estimates the marginal cost borne by the utility to serve a NEM 2.0 customer.

The opening paragraph of the report’s executive summary stated that “overall, we found that NEM 2.0 participants benefit from the structure, while ratepayers see increased rates.” In every test that the author’s conducted the results generally supported this conclusion for residential customers. There were some exceptions in their findings. For example, in the cost of service analysis the report stated that “residential customers that install customer-sited renewable resources on average pay lower bills than the utility’s cost to serve them. On the other hand, nonresidential customers pay bills that are slightly higher than their cost of service after installing customer-sited renewable resources. This is largely due to nonresidential customer rates having demand charges (and other fixed fees), and the lower ratio of PV system size to customer load when compared to residential customers.”

Similar debates over solar rate design, including Massachusetts solar demand charges, highlight how demand charges and TOU decisions can affect customer economics.

NEM-3 timeline

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The preliminary schedule that the CPUC laid out in its OIR estimates that the proceeding will take roughly 15 months in total, starting with a November 2020 pre-hearing conference.

The real meat of the proceeding, where parties will present their proposals for what they believe the successor tariff should be, as the state considers revamping electricity rates to clean the grid, and really show their hand will not begin until the Spring of 2021. So we’re still a little ways away from seeing the proposals that the key parties to this proceeding, like the Investor Owned Utilities (PG&E, SCE, SDG&E), solar and storage advocates such as SEIA, CALSSA, Vote Solar, and ratepayer advocates like TURN) will submit.

While the outcome for the new successor NEM tariff is anyone’s guess at this point, some industry policy folks are starting to speculate. We think it is safe to assume that the value of exported energy will get reduced, with debates over income-based utility charges also influencing rate design. How much and the mechanism for how exports get valued remains to be seen. Based on the findings from the lookback study, it seems like the reduction in export value will be more severe than what happened when NEM 2.0 got implemented. In NEM 2.0, non-bypassable charges, which are volumetric charges that must be paid on all imported energy and cannot be netted-out by exports, only equated to roughly $0.02 to $0.03/kWh.

Given that the value of exports will almost certainly get reduced, we expect that to be bullish for energy storage as America goes electric and load shapes evolve. Energy storage attachment rates with solar are already steadily rising in California. By the time NEM-3 starts getting implemented, likely in 2022, we think storage attachment rates will likely escalate further.

We would not be surprised to see future storage attachment rates in California look like the Hawaiian market today, which are upwards of 80% for certain types of customers and applications. Two big questions on our mind are: (i) will the NEM 3.0 rules be different for different customer class: residential, CARE (e.g., low-income or disadvantaged communities), and commercial & industrial; (ii) will the CPUC introduce some sort of glidepath or phased in implementation approach?

The outcome of this proceeding will have far reaching implications on the future of customer-sited solar and energy storage in California. The NEM-3 outcome in California may likely serve as precedent for other states, as California exports its energy policies across the West, and utility territories that are expected to redesign their Net Energy Metering tariffs in the coming years.

 

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Biden's proposed tenfold increase in solar power would remake the U.S. electricity system

US Solar Power 2050 Target projects 45% electricity from solar, advancing decarbonization with clean energy, wind, nuclear, hydropower, hydrogen, and scalable energy storage, while modernizing the grid and transmission to cut emissions and create jobs.

 

Key Points

A goal for solar to supply ~45% of US electricity by 2050, backed by energy storage and other low-carbon generation.

✅ Requires 1,050-1,570 GW solar and matching storage capacity

✅ Utility-scale buildout uses ~10M acres; rooftop 10-20% of capacity

✅ Complemented by wind, nuclear, hydropower, hydrogen, and flexible turbines

 

President Joe Biden has called for major clean energy investments as a way to curb climate change and generate jobs. On Sept. 8, 2021, the White House released a report produced by the U.S. Department of Energy that found that solar power could generate up to 45% of the U.S. electricity supply by 2050, compared to less than 4% today, with about 3% in 2020 noted by industry observers. The Conversation asked Joshua D. Rhodes, an energy technology and policy researcher at the University of Texas at Austin, what it would take to meet this target.

Why such a heavy focus on solar power? Doesn’t a low-carbon future require many types of clean energy, even though wind and solar could meet about 80% of demand according to some research?
The Energy Department’s Solar Futures Study lays out three future pathways for the U.S. grid: business as usual; decarbonization, meaning a massive shift to low-carbon and carbon-free energy sources; and decarbonization with economy-wide electrification of activities that are powered now by fossil fuels.

It concludes that the latter two scenarios would require approximately 1,050-1,570 gigawatts of solar power, which would meet about 44%-45% of expected electricity demand in 2050, even as renewables approach one-fourth of U.S. generation in the near term. For perspective, one gigawatt of generating capacity is equivalent to about 3.1 million solar panels or 364 large-scale wind turbines.

The rest would come mostly from a mix of other low- or zero-carbon sources, including wind, nuclear, hydropower, biopower, geothermal and combustion turbines run on zero-carbon synthetic fuels such as hydrogen. Energy storage capacity – systems such as large installations of high-capacity batteries – would also expand at roughly the same rate as solar, with record growth in solar and storage anticipated by industry in coming years.

One advantage solar power has over many other low-carbon technologies is that most of the U.S. has lots of sunshine. Wind, hydropower and geothermal resources aren’t so evenly distributed: There are large zones where these resources are poor or nonexistent.

Relying more heavily on region-specific technologies would mean developing them extremely densely where they are most abundant. It also would require building more high-voltage transmission lines to move that energy over long distances, which could increase costs and draw opposition from landowners – a key reason the grid isn't yet 100% renewable according to experts – in many regions.

Is generating 45% of U.S. electricity from solar power by 2050 feasible?
I think it would be technically possible but not easy. It would require an accelerated and sustained deployment far larger than what the U.S. has achieved so far, even as the cost of solar panels has fallen dramatically, and wind, solar and batteries are 82% of the utility-scale pipeline across the country. Some regions have attained this rate of growth, albeit from low starting points and usually not for long periods.

The Solar Futures Study estimates that producing 45% of the nation’s electricity from solar power by 2050 would require deploying about 1,600 gigawatts of solar generation. That’s a 1,450% increase from the 103 gigawatts that are installed in the U.S. today, even as wind and solar trend toward 30% of U.S. electricity in some outlooks. For perspective, there are currently about 1,200 gigawatts of electricity generation capacity of all types on the U.S. power grid.

The report assumes that 10%-20% of this new solar capacity would be deployed on homes and businesses. The rest would be large utility-scale deployments, mostly solar panels, plus some large-scale solar thermal systems that use mirrors to reflect the sun to a central tower.

Assuming that utility-scale solar power requires roughly 8 acres per megawatt, this expansion would require approximately 10.2 million to 11.5 million acres. That’s an area roughly as big as Massachusetts and New Jersey combined, although it’s less than 0.5% of total U.S. land mass.

I think goals like these are worth setting, but are good to reevaluate over time to make sure they represent the most prudent path.

 

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