N.W.T. will encourage more residents to drive electric vehicles

Canada EV-ready rules for MURBs vary by city, with municipal bylaws dictating at-home Level 2 charging in condos, apartments, strata, and townhomes; BC leads, others evaluating updates to building codes.

Key Points

Municipal bylaws mandate EV-ready, Level 2 charging in multi-unit housing; requirements vary by city.

✅ No federal/provincial mandates; municipal bylaws set EV access.

✅ B.C. leads; many cities require 100% EV-ready residential stalls.

✅ Other cities are evaluating code changes; enforcement varies widely.

An absence of federal, provincial rules for EV charging in Canada’s condos, apartment buildings, strata or townhomes punts the issue to municipalities and leaves many strata owners to fend for themselves, finds Electric Autonomy’s cross-Canada guide to municipal building code regulations for EV charging in MURBs

When it comes to reducing barriers to electric vehicle adoption in Canada, one of the most critical steps governments can do is to help provide access to at-home EV charging.

While this is usually not a complicated undertaking in single-unit dwellings, in multi-unit residential buildings (MURBs) which includes apartments, condos, strata and townhomes, the situation and the experience is quite varied for Canadian EV drivers, and retrofitting condos can add complexity depending on the city in which they live.

In Canada, there are no regulations in the national building code that require new or existing condos, apartment buildings, strata or townhomes to offer EV charging. Provinces and territories are able to create their own building laws and codes, but none have added anything yet to support EV charging. Instead, some municipalities are provided with the latitude by their respective provinces to amend local bylaws and add regulations that will require multi-residential units — both new builds and existing ones — to be EV-ready.

The result is that the experience and process of MURB residents getting EV charging infrastructure access is highly fragmented across Canada.

In order to bring more transparency, Electric Autonomy Canada has compiled a roundup of all the municipalities in Canada with existing regulations that require all new constructions to be EV-ready for the future and those cities that have announced publicly they are considering implementing the same.

The tally shows that 21 cities in British Columbia and one city in both Quebec and Ontario have put in place some EV-ready regulations. There are eight other municipalities in Alberta, Saskatchewan, Ontario, Nova Scotia and Newfoundland evaluating their own building code amendments, including Calgary’s condo charging expansion initiatives across apartments and condos.

No municipalities in Manitoba, Prince Edward Island and New Brunswick have any regulations around this. City councils in Edmonton, Saskatoon, Hamilton, Sarnia, Halifax and St. John’s have started looking into it, but no regulations have officially been made.

British Columbia
B.C. is, by far, Canada’s most advanced province in terms of having mandates for EV charging access in condos, apartment buildings, strata or townhomes, leading the country in expanding EV charging with 20 cities with modified building codes to stipulate EV-readiness requirements and one city in the process of implementing them.

City of Vancouver: Bylaw 10908 – Section 10.2.3. was amended on July 1, 2014, to include provisions for Level 2 EV charging infrastructure at all residential and commercial buildings. On March 14, 2018, the bylaw was updated to adopt a 100 per cent EV-ready policy from 20 per cent to 100 per cent. The current bylaw also requires one EV-ready stall for single-family residences with garages and 10 per cent of parking stalls to be EV-ready for commercial buildings.

City of Burnaby: Zoning Bylaw 13903 – Section 800.8, which took effect on September 1st, required Level 2 energized outlets in all new residential parking spaces. This includes both single-family homes and multi-unit residential buildings. Parking spaces for secondary suites and visitor parking are exempt, but all other stalls in new buildings must be 100 per cent EV-ready.

City of Nelson: The city amended its Off-Street Parking and Landscaping Bylaw No. 3274 – Section 7.4 in 2019 to have at least one parking space per dwelling unit feature
Level 2 charging or higher in new single-family and multi-unit residential buildings, starting in 2020. For every 10 parking spaces available at a dwelling, two stalls must have Level 2 charging capabilities.

City of Coquitlam: The Zoning Bylaw No. 4905 – Section 714 was amended on October 29, 2018, to require all new construction, including single-family residences and MURBs, to have a minimum of one energized outlet capable of Level 2 charging or higher for every dwelling unit. Parking spaces designated for visitors are exempt.

If the number of parking spaces is less than the number of dwelling units, all residential parking spots must have an energized outlet with Level 2 or higher charging capabilities.

City of North Vancouver: According to Zoning Bylaw No. 6700 – Section 909, all parking spaces in all new residential multi-family buildings must include Level 2 EV charging infrastructure as of June 2019 and 10 per cent of residential visitor parking spaces must include Level 2 EV charging infrastructure as of Jan. 2022.

District of North Vancouver: Per the Electric Vehicle Charging Infrastructure Policy, updated on March 17, 2021, all parking stalls — not including visitor parking — must feature energized outlets capable of providing Level 2 charging or higher for multi-family residences.

City of New Westminster: As of April 1, 2019, all new buildings with at least one residential unit are required to have a Level 2 energized outlet to the residential parking spaces, according to Electric Vehicle Ready Infrastructure Zoning Bylaw 8040, 2018. Energized Level 2 outlets will not be required for visitor parking spaces.

City of Port Moody: Zoning Bylaw No. 2937 – Section 6.11 mandated that all spaces in new residential constructions starting from March 1, 2019, required an energized outlet capable of Level 2 charging. A minimum of 20 per cent of spaces in new commercial constructions from March 1, 2019, required an energized outlet capable of Level 2 charging.

City of Richmond: All new buildings and residential parking spaces from April 1, 2018, excluding those provided for visitors’ use, have had an energized outlet capable of providing Level 2 charging or higher to the parking space, says Zoning Bylaw 8500 – Section 7.15.

District of Saanich: Zoning Bylaw No. 8200 – Section 7 specified that all new residential MURBs are required to provide Level 2 charging after Sept. 1, 2020.

District of Squamish: Bylaw No. 2610, 2018 Subsection 41.11(f) required 100 per cent of off-street parking stalls to have charging infrastructure starting from July 24, 201, in any shared parking areas for multiple-unit residential uses.

City of Surrey: Zoning By-law No. 12000 – Part 5(7) was amended on February 25, 2019 to say builders must construct and install an energized electrical outlet for 100 per cent of residential parking spaces, with home and workplace charging rebates helping adoption, 50 per cent of visitor parking spaces, and 20 per cent of commercial parking spaces. Each energized electrical outlet must be capable of providing Level 2 or a higher level of electric vehicle charging

District of West Vancouver: Per Zoning Bylaw No. 4662 – Sections 142.10; 141.01(4), new dwelling units, all parking spaces for residential use, except visitor parking, need to include an energized outlet that is: (a) capable of providing Level 2 charging for an electric vehicle; (b) labelled for the use of electric vehicle charging.

City of Victoria: In effect since October 1, 2020, the Zoning Bylaw No. 80-159 – Schedule C Section 2.4 stipulates that all residential parking spaces in new residential developments must have an energized electrical outlet installed that can provide Level 2 charging for an electric vehicle, and residents can access EV charger rebates to offset costs. This requirement applies to both single-family and multi-unit residential dwellings but not visitor parking spaces.

Township of Langley: In Zoning Bylaw No. 2500 – Section 107.3, all new residential construction, including single-home dwellings, townhouses and apartments, required one space per dwelling unit to have EV charging requirements, starting from Nov. 4, 2019.

Town of View Royal: As per Zoning Bylaw No. 900 – Section 5.13, every commercial or multi-unit residential construction with more than 100 parking spots must provide an accessible electric vehicle charging station on the premises for patrons or residents. This bylaw was adopted on Feb. 2021.

Nanaimo: According to the Off-Street Parking Regulations Bylaw No. 7266 – Section 7.7, a minimum of 25 per cent of all off-street parking spots in any common parking area for multifamily residential housing must have shared access to a Level 2 EV charging, and have an electrical outlet box wired with a separate branch circuit capable of supplying electricity to support both Level 1 and Level 2 charging.

Port Coquitlam: For residential buildings that do not have a common parking area, one parking space per dwelling unit is required to provide “roughed-in” charging infrastructure, put in effect on Jan. 23, 2018. This must include an electrical outlet box located within three metres of the unit’s parking space, according to Zoning Bylaw No. 3630 – Section 2.5.10;11. For a residential building with a common parking area, a separate single utility electrical meter and disconnect should be provided in line with the electrical panel(s) intended to provide EV charging located within three metres of the parking space.

Maple Ridge: The city’s Bylaw No. 4350-1990 – Schedule F says for apartments, each parking space provided for residential use, excluding visitor parking spaces, will be required to have roughed-in infrastructure capable of providing Level 2 charging.

Apartments and townhouses with a minimum of 50 per cent of required visitor parking spaces will need partial infrastructure capable of Level 2 charging.

White Rock: The city is currently considering changes to its Zoning Bylaw, 2012, No. 2000. On March 18, 2021, the Environmental Advisory Committee presented recommendations that would require all resident parking stalls to be Level 2 EV-ready in new multi-unit residential buildings and 50 per cent of visitor parking stalls to be Level 2 EV-ready in new multi-unit residential buildings.

Kamloops: The city of Kamloops is looking to draft a zoning amendment bylaw that would require new residential developments, all new single-family, single-family with a secondary suite, two-family, and multi-family residential developments, to have EV-ready parking with one parking stall per dwelling unit, at the beginning of Jan. 1, 2023.

Kamloops’ sustainability services supervisor Glen Cheetham told Electric Autonomy Canada in an email statement that the city’s council has given direction to staff to “conduct one final round of engagement with industry before bringing the zoning amendment bylaw to Council mid-June for first and second reading, followed by a public hearing and third reading/approval.”

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China EV Market sees surging deliveries as Tesla, XPeng, Nio, and Li Auto race for market share, driven by tech-forward infotainment, autonomous features, and strong P7 and G3 demand, signaling intensifying competition and rapid growth.

Key Points

China EV Market features rapid EV sales growth led by Tesla, XPeng, Nio, and Li Auto amid tech-driven competition.

✅ XPeng deliveries up 617% YoY in June; 459% YTD growth

✅ Nio and Li Auto post triple-digit quarterly gains

✅ Tech focus: infotainment, ADAS; models P7, G3, G3i

XPeng President and Vice Chairman Brian Gu is quick to praise the Tesla brand and acknowledge the EV maker's "commanding" market share in China, and in key markets like the California EV market as well. 

But in the same breath, the executive at the upstart China-based EV rival said his company and peers are fast closing the competitive gap with Tesla.

"I think the Chinese players are catching up very quickly," Gu said on Yahoo Finance Live. "Our product as well as some of the other products that are being introduced by the leading players are very good, and have comparable specs — as well as better features I think compared to Tesla."

That point is not lost in the sales data from the main China EV players, and mirrors the global EV surge seen in recent years.

XPeng said this week deliveries in June surged 617% year-over-year to 6,565. So far this year, deliveries have skyrocketed 459% to 30,738 fueled by demand for XPeng's P7 sedan and G3 SUV, despite concerns about the biggest threats to the EV boom among investors. 

June deliveries at Nio rose 116% from a year ago to 8,083, even as mainstream adoption hurdles remain industry-wide. For the quarter ending June 30, Nio delivered 21,896 vehicles marking a growth rate from a year ago of 112%. 

As for Li Auto, its June deliveries rose 321% from a year earlier to 7,713. Second quarter deliveries improved 166% year-over-year to 17,575.

Tesla reportedly sold 33,155 cars in China in June, up 122% year-over-year, even as its energy business outlook remains a focus for investors. 

"In the last few months, our growth has outpaced the industry as well as Tesla in China. But I think it's a long race because ultimately this market will not be dominated by one or two companies. It will probably be a number of players occupying probably large market share positions of 10% and above. That will likely be the trend, and we hope to be one of those top players," Gu explained. 

XPeng — which JPMorgan analysts estimate could grab 8% of China's electric car market by 2025 —currently has two models in the Chinese electric car market, as China's carmakers push into Europe too. They have gained notoriety in an increasingly crowded market for their tech-forward infotainment systems and autonomous technology.

The company's third model dubbed the G3i is expected to see deliveries begin in September, taking aim at smaller sedans such as the Toyota Camry. 

Shares of China's EV makers have cooled off this year despite their strong sales, and the U.S. EV market share dipped in early 2024 as well. XPeng shares are down 7% year-to-date, while Nio has shed 5%. Li Auto's stock is down 11% on the year. 

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Electric Vehicle Charging Costs and Times explain kWh usage, electricity rates, Level 2 vs DC fast charging, per-mile expense, and tax credits, with examples by region and battery size to estimate home and public charging.

Key Points

They measure EV charging price and duration based on kWh rates, charger level, efficiency, and location.

✅ Costs vary by kWh price, region, and charger type.

✅ Efficiency (mi/kWh) sets per-mile cost and range.

✅ Tax credits and utility rates impact total ownership.

More and more car manufacturing companies dip their toes in the world of electric vehicles every year, making it a good time to buy an EV for many shoppers, and the U.S. government is also offering incentives to turn the tides on car purchasing. Electric vehicles bought between 2010 and 2022 may be eligible for a tax credit of up to $7,500. 

And according to the Consumer Reports analysis on long-term ownership, the cost of charging an electric vehicle is almost always cheaper than fueling a gas-powered car – sometimes by hundreds of dollars.

But that depends on the type of car and where in the country you live, in a market many expect to be mainstream within a decade across the U.S. Here's everything you need to know.

How much does it cost to charge an electric car?
An electric vehicle’s fuel efficiency can be measured in kilowatt-hours per 100 miles, and common charging-efficiency myths have been fact-checked to correct math errors.

For example, if electricity costs 10.7 cents per kilowatt-hour, charging a 200-mile range 54-kWh battery would cost about $6. Charging a vehicle that consumes 27 kWh to travel 100 miles would cost three cents a mile. 

The national average cost of electricity is 10 cents per kWh and 11.7 cents per kWh for residential use. Idaho National Laboratory’s Advanced Vehicle Testing compares the energy cost per mile for electric-powered and gasoline-fueled vehicles.

For example, at 10 cents per kWh, an electric vehicle with an efficiency of 3 miles per kWh would cost about 3.3 cents per mile. The gasoline equivalent cost for this electricity cost would be just under $2.60 per gallon.

Prices vary by location as well. For example, Consumer Report found that West Coast electric vehicles tend to be less expensive to operate than gas-powered or hybrid cars, and are often better for the planet depending on local energy mix, but gas prices are often lower than electricity in New England.

Public charging networks in California cost about 30 cents per kWh for Level 2 and 40 cents per kWh for DCFC. Here’s an example of the cost breakdown using a Nissan LEAF with a 150-mile range and 40-kWh battery:

Level 2, empty to full charge: $12
DCFC, empty to full charge: $16

Many cars also offer complimentary charging for the first few years of ownership or provide credits to use for free charging. You can check the full estimated cost using the Department of Energy’s Vehicle Cost Calculator as the grid prepares for an American EV boom in the years ahead.

How long does it take to charge an electric car?
This depends on the type of charger you're using. Charging with a Level 1 charger takes much longer to reach full battery than a level 2 charger or a DCFC, or Direct Current Fast Charger. Here's how much time you can expect to spend charging your electric vehicle:

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Global Wind Power Growth will hit record installations, buoying renewable energy, offshore wind, onshore capacity, and economic recovery, as GWEC forecasts resilient post-Covid markets led by China and the US with strong investment and jobs.

Key Points

Global Wind Power Growth is the forecast rise in capacity driving renewable energy, jobs, and lower emissions.

✅ 71.3 GW installed in 2020; only 6% below pre-Covid forecast

✅ 348 GW added by 2024; nearly 1,000 GW total capacity

✅ Offshore wind resilient; 6.5 GW in 2020, China-led

Wind power will continue to show record growth, as renewables set to shatter records over the next five years despite the impacts of the Covid-19 crisis, and will make a crucial contribution to economic recovery... According to the latest market outlook by GWEC Market Intelligence, 71.3GW of wind power capacity is expected to be installed in 2020, which is only a 6% reduction from pre-Covid forecasts. This is a significant increase from original predictions that expected wind power installations to be reduced by up to 20 per cent due to the pandemic, demonstrating the resilience of the wind power industry across the globe.

From 2020 to 2024, the cumulative global wind energy market will grow at a compound annual rate of 8.5% and installing 348GW of new capacity, bringing total global wind power capacity to nearly 1,000GW by the end of 2024, which is an increase of 54% for total wind power installations compared to 2019. While some project completion dates have been pushed into 2021 due to the pandemic, next year is expected to be a record year for the wind industry with 78GW of new wind capacity forecasted to be installed in 2021. Over 50% of the onshore wind capacity added between 2020 to 2024 will be installed in China and the US, where U.S. solar and wind growth is supported by favourable government plans, led by installation rushes to meet subsidy deadlines.

The offshore wind sector has been largely shielded from the impacts of the Covid-19 crisis, GWEC Market Intelligence has indeed increased its forecast for offshore wind by 5 per cent to 6.5 GW of new installations in 2020, another record year for the industry, as offshore wind's $1 trillion outlook comes into focus, led by the installation rush in China. Up until 2024, over 48GW of new offshore wind capacity is expected to be installed, with another 157GW forecasted to be installed from 2025 to 2030 across key markets such as offshore wind in the UK and Asia.

“While the Covid-19 crisis has impacted every industry across the world, wind power has continued to grow and thrive. This is no surprise given the cost competitiveness of wind energy and the need to rapidly reproduce carbon emissions. Fossil fuel industries face market fluctuations and require bailouts to stay afloat, while wind turbines across the world have continued to spin and provide affordable, clean energy to citizens everywhere," says Ben Backwell, CEO of GWEC.

“Thanks to the localised nature of wind power supply chains and project construction, the sector has continued to generate billions in local investment and thousands of jobs to support economic recovery. However, in order to tap into the full potential of wind power to drive a green recovery, governments must ensure that energy markets and policies allow a continued ramp up in investment in wind and other renewables, and avoid unintended effects such as the Solar ITC extension impact on the US wind market, while disincentivising investment in expensive and declining fossil fuel industries," he says.

Biggest markets

China and the US will continue to be the two main markets driving growth over the next few years, with U.S. wind power surges underscoring the momentum. "We have increased or maintained our forecasts for onshore wind in regions such as Latin America, North America, Africa, and the Middle East over the next five years, with only minor decreases in Asia Pacific and Europe. However, these reductions are not necessarily a direct impact of Covid-19, but also a symptom of pre-existing regulatory issues, such as protracted permitting procedures, which are slowing down installations. In particular, offshore wind has demonstrated its resilience by exceeding our pre-pandemic forecasts for 2020, and will be an important source of growth in the decade ahead," Feng Zhao, strategy director at GWEC.

“We have seen a series of carbon neutrality commitments by major economies such as China, Japan and South Korea over the past few weeks. Since wind power is a key technology for decarbonisation, building on the evolution in 2016, these targets will increase the forecast for wind power over the next few decades. However, the right enabling regulatory and policy frameworks must be in place to accelerate renewable energy growth to meet these targets. China, the world’s largest wind power market and largest carbon emitter, has pledged to go carbon-neutral by 2060. To have a chance at achieving this target, we need to be installing 50GW of wind power per year in China from now until 2025, and then 60GW from 2026 onwards. It is crucial that governments firm up carbon neutrality targets with tangible actions to drive wind and other renewable energy growth at the levels needed to achieve these aims”, he says.

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Canada’s clean energy sector is expanding as Indigenous communities lead electricity transmission projects, drive sustainable growth, and strengthen energy independence through renewable power, community ownership, and grid connections across remote and regional areas of Canada.

What is Canada’s Clean Energy Sector?

Canada’s clean energy sector encompasses industries and initiatives that generate, transmit, and manage low-carbon electricity to meet the country's national climate goals. It emphasizes Indigenous participation, renewable innovation, and equitable economic growth.

✅ Expands renewable electricity generation and transmission

✅ Builds Indigenous-led ownership and partnerships

✅ Reduces emissions through sustainable energy transition

Canada’s clean energy sector is entering a pivotal era of transformation, with Indigenous communities emerging as leading partners in expanding electricity transmission and renewable infrastructure, including grid modernization projects that are underway nationwide. These communities are not only driving projects that connect remote regions to the grid but also redefining what energy leadership and equity look like in Canada.

At a recent webinar co-hosted by the Canadian Climate Institute and the Indigenous Power Coalition, panellists discussed the growing wave of Indigenous-led electricity transmission projects and the policies needed to strengthen Indigenous participation. The event, moderated by Frank Busch, featured Margaret Kenequanash, CEO of Wataynikaneyap Power; Kahsennenhawe Sky-Deer, Grand Chief of the Mohawk Council of Kahnawà:ke; and Blaise Fontaine, Co-Founder of ProACTIVE Planning Inc. and Indigenous Power Coalition.

The discussion comes at a crucial moment for Canada’s clean energy transition. As the country races to meet its climate commitments and zero-emissions electricity by 2035 targets, demand for clean power is rising rapidly. Historically, energy development in Canada occurred on Indigenous lands without consent or fair participation, but today, Indigenous communities collectively represent the largest clean energy asset owners outside Crown and private utilities.

“There is a genuine appetite for Indigenous communities to not just own transmission projects but to also lead,” said Fontaine. He noted that Indigenous communities are increasingly setting the terms of engagement, selecting partners, and shaping projects in line with their cultural and environmental values.

One of the strongest examples of this transformation is the Wataynikaneyap (Watay) Power Project in northern Ontario, a 1,800-kilometre transmission line connecting 17 remote First Nations communities to the provincial grid. “Communities must fully understand what they are getting into, since it is their homelands that will be impacted,” said Kenequanash. She emphasized that the project’s success came from five years of inter-community meetings to agree on shared principles before any external engagement.

The panel also highlighted the Hertel–New York Interconnection Line, co-owned by Hydro-Québec and the Mohawk Council of Kahnawà:ke, as another milestone in Indigenous energy leadership. Sky-Deer noted that the project’s co-ownership model required Quebec’s National Assembly to pass Bill 13, a first-of-its-kind legal framework. “That was a breakthrough,” she said, “but it also shows that true partnership still depends on one-off exceptions rather than standard policy.”

Panellists agreed that Canada’s regulatory systems have not kept pace with Indigenous leadership. Fontaine called on governments to “think outside the box to avoid staying stuck in the status quo,” emphasizing the need for enabling policies that align with an electric, connected and clean vision for Canada while making Indigenous-led ownership the norm rather than the exception.

Financial readiness is another key factor driving Indigenous participation. Communities are now accessing capital through partnerships with financial institutions and government loan programs, and growing evidence that a 2035 zero-emissions grid is practical and profitable is strengthening investor confidence. The collaboration between the Mohawk Council of Kahnawà:ke and the Caisse de dépôt et placement du Québec exemplifies tailored financing and long-term investment that supports community ownership and sustainable growth.

True equity, however, goes beyond financial participation. “It’s not just about having a percentage stake,” Fontaine explained. “True equity means meaningful decision-making power and control.” Indigenous leaders are insisting on co-governance structures that align with their worldviews, prioritizing environmental protection, cultural respect, and intergenerational stewardship.

The benefits of this approach extend far beyond project economics. Communities involved in ownership experience tangible local benefits, including employment and training opportunities, as well as new investments in education and culture. Hydro-Québec’s $10 million contribution to the Kahnawà:ke Cultural Arts Center is one example of how partnerships can support cultural renewal and community development.

As Canada looks to build east–west electricity interties and expand renewable energy generation, including solar where Canada has lagged in deployment nationwide, Indigenous leadership is becoming increasingly central to national energy policy. Fontaine noted that this shift offers “even greater opportunities for Indigenous-led transmission as Canada connects its provinces rather than just exporting power south.”

In particular, Alberta's energy profile highlights both rapid growth in renewables and ongoing fossil fuel strength, informing intertie planning and market design.

On the National Truth and Reconciliation Day, panellists urged reflection on both the barriers that remain and the opportunities ahead. Indigenous leadership in Canada’s clean energy sector is proving that reconciliation can take tangible form, through ownership, partnership, and shared prosperity.

This transformation represents more than an energy transition; it’s a rebalancing of power, respect, and responsibility, carried out “in a good way,” as the panellists emphasized, and essential to building a clean, inclusive energy future for all Canadians while strengthening the global electricity market position of the country.

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CAISO Renewable Curtailments reflect grid balancing under transmission congestion and oversupply, reducing solar and wind output while leveraging WEIM trading, battery storage, and transmission expansion to integrate renewables and stabilize demand-supply.

Key Points

CAISO renewable curtailments are reductions in wind and solar output to balance grid amid congestion or oversupply.

✅ Driven mainly by transmission congestion, less by oversupply.

✅ Peaks in spring when demand is low and solar output is high.

✅ Mitigated by WEIM trades, new lines, and battery storage growth.

The California Independent System Operator (CAISO), the grid operator for most of the state, is increasingly curtailing solar- and wind-powered electricity generation, as reported in rising curtailments, as it balances supply and demand during the rapid growth of wind and solar power in California.

Grid operators must balance supply and demand to maintain a stable electric system as advances in solar and wind continue to scale. The output of wind and solar generators are reduced either through price signals or rarely, through an order to reduce output, during periods of:

Congestion, when power lines don’t have enough capacity to deliver available energy
Oversupply, when generation exceeds customer electricity demand

In CAISO, curtailment is largely a result of congestion. Congestion-related curtailments have increased significantly since 2019 because California's solar boom has been outpacing upgrades in transmission capacity.

In 2022, CAISO curtailed 2.4 million megawatthours (MWh) of utility-scale wind and solar output, a 63% increase from the amount of electricity curtailed in 2021. As of September, CAISO has curtailed more than 2.3 million MWh of wind and solar output so far this year, even as the US project pipeline is dominated by wind, solar, and batteries.

Solar accounts for almost all of the energy curtailed in CAISO—95% in 2022 and 94% in the first seven months of 2023. CAISO tends to curtail the most solar in the spring when electricity demand is relatively low (because moderate spring temperatures mean less demand for space heating or air conditioning) and solar output is relatively high, although wildfire smoke impacts can reduce available generation during fire season as well.

CAISO has increasingly curtailed renewable generation as renewable capacity has grown in California, and the state has even experienced a near-100% renewables moment on the grid in recent years. In 2014, a combined 9.0 gigawatts (GW) of wind and solar capacity had been built in California. As of July 2023, that number had grown to 17.6 GW. Developers plan to add another 3.0 GW by the end of 2024.

CAISO is exploring and implementing various solutions to its increasing curtailment of renewables, including:

The Western Energy Imbalance Market (WEIM) is a real-time market that allows participants outside of CAISO to buy and sell energy to balance demand and supply. In 2022, more than 10% of total possible curtailments were avoided by trading within the WEIM. A day ahead market is expected to be operational in Spring 2025.

CAISO is expanding transmission capacity to reduce congestion. CAISO’s 2022–23 Transmission Planning Process includes 45 transmission projects to accommodate load growth and a larger share of generation from renewable energy sources.

CAISO is promoting the development of flexible resources that can quickly respond to sudden increases and decreases in demand such as battery storage technologies that are rapidly becoming more affordable. California has 4.9 GW of battery storage, and developers plan to add another 7.6 GW by the end of 2024, according to our survey of recent and planned capacity changes. Renewable generators can charge these batteries with electricity that would otherwise have been curtailed.

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