How much does it cost to charge an electric vehicle? Here's what you can expect.

Northwest Territories EV Charging Corridor aims to link the Alberta boundary to Yellowknife with Level 3 fast chargers and Level 2 stations, boosting electric vehicle adoption in cold climates, cutting GHG emissions, supporting zero-emission targets.

Key Points

A planned corridor of Level 3 and Level 2 chargers linking Alberta and Yellowknife to boost EV uptake and cut GHGs.

✅ Level 3 fast charger funded for Behchoko by spring 2024.

✅ Up to 72 Level 2 chargers funded across N.W.T. communities.

✅ Supports Canada ZEV targets and reduces fuel use and CO2e.

Electric vehicles are a rare sight in Canada's North, with challenges such as frigid winter temperatures and limited infrastructure across remote regions.

The Northwest Territories is hoping to change that.

The territorial government plans to develop a vehicle-charging corridor between the Alberta boundary and Yellowknife to encourage more residents to buy electric vehicles to reduce their carbon footprint.

"There will soon be a time in which not having electric charging stations along the highway will be equivalent to not having gas stations," said Robert Sexton, director of energy with the territory’s Department of Infrastructure.

"Even though it does seem right now that there’s limited uptake of electric vehicles and some of the barriers seem sort of insurmountable, we have to plan to start doing this, because in five years' time, it’ll be too late."

The federal government has committed to a mandatory 100 per cent zero-emission vehicle sales target by 2035 for all new light-duty vehicles, though in Manitoba reaching EV targets is not smooth so progress may vary. It has set interim targets for at least 20 per cent of sales by 2026 and 60 per cent by 2030.

A study commissioned by the N.W.T. government forecasts electric vehicles could account for 2.9 to 11.3 per cent of all annual car and small truck sales in the territory in 2030.

The study estimates the planned charging corridor, alongside electric vehicle purchasing incentives, could reduce greenhouse gas emissions by between 260 and 1,016 tonnes of carbon dioxide equivalent in that year.

Sexton said it will likely take a few years before the charging corridor is complete. As a start, the territory recently awarded up to $480,000 to the Northwest Territories Power Corporation to install a Level 3 electric vehicle charger in Behchoko.

The N.W.T. government projects the charging station will reduce gasoline use by 61,000 litres and decrease carbon dioxide equivalent by up to 140 tonnes per year. It is scheduled to be complete by the spring of 2024.

The federal government earlier this month announced $414,000, along with $56,000 in territorial funding, to install up to 72 primarily Level 2 electric vehicle charges in public places, streets, multi-unit residential buildings, workplaces, and facilities with light-duty vehicle fleets in the N.W.T. by March 2024, while in New Brunswick new fast-charging stations are planned on the Trans-Canada.

In Yukon, the territory has pledged to develop electric vehicle infrastructure in all road-accessible communities by 2027. It has already installed 12 electric vehicle chargers with seven more planned, and in N.L. a fast-charging network signals early progress as well.

Just a few people in the N.W.T. currently own electric vehicles, and in Atlantic Canada EV adoption lags as well.

Patricia and Ken Wray in Hay River have owned a Tesla Model 3 for three years. Comparing added electricity costs with savings on gasoline, Patricia estimates they spend 60 per cent less to keep the Tesla running compared to a gas-powered vehicle.

“I don’t mind driving past the gas station,” she said.

Despite some initial hesitation about how the car would perform in the winter, Wray said she hasn’t had any issues with her Tesla when it’s -40 C, although it does take longer to charge. She added it “really hugs the road” in snowy and icy conditions.

“People in the North need to understand these cars are marvellous in the winter,” she said.

Wray said while she and her husband drive their Tesla regularly, it’s not feasible to drive long distances across the territory. As the number of electric vehicle charge stations increases across the N.W.T., however, that could change.

“I’m just very, very happy to hear that charging infrastructure is now starting to be put in place," she said.

Andrew Robinson with the YK Care Share Co-op is more skeptical about the potential success of a long-distance charging corridor. He said while government support for electric vehicles is positive, he believes there's a more immediate need to focus on uptake within N.W.T. communities. He pointed to local taxi services as an example.

"It’s a long stretch," he said of the drive from Alberta, where EVs are a hot topic, to Yellowknife. "It’s 17 hours of hardcore driving and when you throw in having to recharge, anything that makes that longer, people are not going to be really into that.”

The car sharing service, which has a 2016 Chevy Spark dubbed “Sparky,” states on its website that a Level 2 charger can usually recharge a vehicle within six to eight hours while a Level 3 charger takes approximately half an hour, as faster charging options roll out in B.C. and beyond.

Related News

• Electricity Forum News

• EV Infrastructure News

Canadian Electric Bus Fleet leads North America as Toronto's TTC deploys 59 battery-electric, zero-emission buses, advancing public transit decarbonization with charging infrastructure, federal funding, lower maintenance, and lifecycle cost savings for a low-carbon urban future.

Key Points

Canada's leading battery-electric transit push, led by Toronto's TTC, scaling zero-emission buses and charging.

✅ Largest battery-electric bus fleet in North America

✅ TTC trials BYD, New Flyer, Proterra for range and reliability

✅ Charging infrastructure, funding, and specs drive 2040 zero-emissions

The largest battery-powered electric bus fleet in North America is Canadian. Toronto's transit system is now running 59 electric buses from three suppliers, and Edmonton's first electric bus is now on the road as well. And Canadian pioneers such as Toronto offer lessons for other transit systems aiming to transition to greener fleets for the low-carbon economy of the future.

Diesel buses are some of the noisier, more polluting vehicles on urban roads. Going electric could have big benefits, even though 18% of Canada's 2019 electricity from fossil fuels remains a factor.

Emissions reductions are the main reason the federal government aims to add 5,000 electric buses to Canada's transit and school fleets by the end of 2024. New funding announced this week as part of the government's fall fiscal update could also give programs to electrify transit systems a boost.

"You are seeing huge movement towards all-electric," said Bem Case, the Toronto Transit Commission's head of vehicle programs. "I think all of the transit agencies are starting to see what we're seeing ... the broader benefits."

While Vancouver has been running electric trolley buses (more than 200, in fact), many cities (including Vancouver) are now switching their diesel buses to battery-electric buses in Metro Vancouver that don't require overhead wires and can run on regular bus routes.

The TTC got approval from its board to buy its first 30 battery-electric buses in November 2017. Its plan is to have a zero-emissions fleet by 2040.

That's a crucial part of Toronto's plan to meet its 2050 greenhouse gas targets, which requires 100 per cent of vehicles to transition to low-carbon energy by then.

But Case said the transition can't happen overnight. 

Finding the right bus
For one thing, just finding the right bus isn't easy.

"There's no bus, by any manufacturer, that's been in service for the entire life of a bus, which is 12 years," Case said.

"And so really, until then, we don't have enough experience, nor does anyone else in the industry, have enough experience to commit to an all-electric fleet immediately."

In fact, Case said, there are only three manufacturers that make suitable long-range buses — the kind needed in a city the size of Toronto.

Having never bought electric buses before, the city had no specifications for what it needed in an electric bus, so it decided to try all three suppliers: Winnipeg-based New Flyer; BYD, which is headquartered in Shenzhen, China, but built the TTC buses at its Newmarket, Ont. facility; and California-based Proterra.

They all had their strengths and weaknesses, based on their backgrounds as a traditional non-electric bus manufacturer, a battery maker and a vehicle technology and design startup, respectively.

"Each bus type has its own potential challenges." Case said all three manufacturers are working to resolve any adoption challenges as quickly as possible.

But the biggest challenge of all, Case said, is getting the infrastructure in place. 

"There's no playbook, really, for implementing charging infrastructure," he said.

Each bus type needed their own chargers, in some cases using different types of current. Each type has been installed in a different garage in partnership with local utility Toronto Hydro.

Buying and installing them represented about $70 million, or about half the cost of acquiring Toronto's first 60 electric buses. The $140 million project was funded by the federal Public Transit Infrastructure Fund.

Case said it takes about three hours to charge a battery that has been fully depleted. To maximize use of the bus, it's typically put on a long route in the morning, covering 200 to 250 kilometres. Then it's partially charged and put on a shorter run in the late afternoon.

"That way we get as much mileage on the buses as we can."

Cost and reliability?
Besides the infrastructure cost of chargers, each electric bus can cost $200,000 to $500,000 more per bus than an average $750,000 diesel bus. 

Case acknowledges that is "significantly" more expensive, but it is offset by fuel savings over time, as electricity costs are cheaper. Because the electric buses have fewer parts than diesel buses, maintenance costs are also about 25 per cent lower and the buses are expected to be more reliable.

As with many new technologies, the cost of electric buses is also falling over time.

Case expects they will eventually get to the point where the total life-cycle cost of an electric and a diesel bus are comparable, and the electric bus may even save money in the long run.

As of this fall, all but one of the 60 new electric buses have been put into service. The last one is expected to hit the road in early December.

Summer testing showed that air conditioning the buses reduced the battery capacity by about 15 per cent. 

But the TTC needs to see how much of the battery capacity is consumed by heating in winter, at least when the temperature is above 5 C. Below that, a diesel-powered heater kicks in.

Once testing is complete, the TTC plans to develop specifications for its electric bus fleet and order 300 more in 2023, for delivery between 2023 and 2025.

Potential benefits
Even with some diesel heating, the TTC estimates electric buses reduce fuel usage by 70 to 80 per cent. If its whole fleet were switched to electric buses, it could save $50 million to $70 million in fuel a year and 150 tonnes of greenhouse gases per bus per year, or 340,000 tonnes for the entire fleet.

Other than greenhouse gases, electric buses also generate fewer emissions of other pollutants. They're also quieter, creating a more comfortable urban environment for pedestrians and cyclists.

But the benefits could potentially go far beyond the local city.

"If the public agencies start electrifying their fleet and their service is very demanding, I think they'll demonstrate to the broader transportation industry that it is possible," Case said.

"And that's where you'll get the real gains for the environment."

Alex Milovanoff, a postdoctoral researcher in the University of Toronto's department of civil engineering, did a U of T EV study that suggested electrified transit has a crucial role to play in the low-carbon economy of the future.

His calculations show that 90 per cent of U.S. passenger vehicles — 300 million — would need to be electric by 2050 to reach targets under the global Paris Agreement to fight climate change.

And that would put a huge strain on resources, including both the mining of metals, such as lithium and cobalt, that are used in electric vehicle batteries and the electrical grid itself.

A better solution, he showed, was combining the transition to electric vehicles with a reduction in the number of private vehicles, and higher usage of transit, cycling and walking.

"Then that becomes a feasible picture," he said.

What's needed to make the transition
But in order to make that happen, governments need to make investments and navigate the 2035 EV mandate debate on timelines, he added.

That includes subsidies for buying electric buses and building charging stations so transit agencies don't need to make fares too high. But it also includes more general improvements to the range and reliability of transit infrastructure.

"Electrifying the bus fleet is only efficient if we have a large public transit fleet and if we have many buses on the road and if people take them," Milovanoff said.

In its fall economic update on Monday, the federal government announced $150 million over three years to speed up the installation of zero-emission vehicle infrastructure.

Josipa Petrunic, CEO of the Canadian Urban Transit Research and Innovation Consortium, a non-profit organization focused on zero-carbon mobility and transportation, said that in the past, similar funding has paid for high-powered charging systems for transit systems in B.C. and Ontario. But that's only a small part of what's needed, she said.

"Infrastructure Canada needs to come to the table with the cash for the buses and the whole rest of the system."

She said funding is needed for:

Feasibility studies to figure out how many and what kinds of buses are needed for different routes in different transit systems.

Targets and incentives to motivate transit systems to make the switch.

Incentives to encourage Canadian procurement to build the industry in Canada.

Technology to collect and share data on the performance of electric vehicles so transit systems can make the best-possible decisions to meet the needs of their riders.

Petrunic said that a positive side-effect of electrifying transit systems is that the infrastructure can support, in addition to buses, electric trucks for moving freight.

"It's not a lot given that we have 15,000 buses out there in the transit fleet," she said.

"But we should be able to get a lot further ahead if we match the city commitments to zero emissions with federal and provincial funding for jobs creating zero-emissions technologies."

Related News

• Electricity Forum News

• EV Infrastructure News

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.

Related News

• Electricity Forum News

• EV Infrastructure News

Green Hydrogen for Steelmaking enables decarbonization in Germany by powering electrolyzers with wind turbines at Salzgitter. Partners Vestas, Avacon, and Linde support renewable hydrogen for iron ore reduction, cutting CO2 in heavy industry.

Key Points

Hydrogen from renewable-powered electrolysis replacing coal in iron ore reduction, cutting CO2 emissions from steelmaking

✅ 30 MW Vestas wind farm powers 2x1.25 MW electrolyzers.

✅ Salzgitter, Avacon, Linde link sectors to replace fossil fuels.

✅ Targets CO2 cuts in iron ore reduction and steel smelting.

A major green hydrogen facility in Germany has started operations, with those behind the project hoping it will help to decarbonize the energy-intensive steel industry in the years ahead. 

The "WindH2" project involves German steel giant Salzgitter, E.ON subsidiary Avacon and Linde, a firm specializing in engineering and industrial gases, and aligns with calls for hydrogen-ready power plants in Germany today.

Hydrogen can be produced in a number of ways. One method includes using electrolysis, with an electric current splitting water into oxygen and hydrogen, and advances in PEM hydrogen technology continue to improve efficiency worldwide.

If the electricity used in the process comes from a renewable source such as wind or solar, as underscored by recent German renewables gains, then it's termed "green" or "renewable" hydrogen.

The development in Germany is centered around seven new wind turbines operated by Avacon and two 1.25 megawatt (MW) electrolyzer units installed by Salzgitter Flachstahl, which is part of the wider Salzgitter Group. The facilities were presented to the public this week. 

The turbines, from Vestas, have a hub height of 169 meters and a combined capacity of 30 MW. All are located on premises of the Salzgitter Group, with three situated on the site of a steel mill in the city of Salzgitter, Lower Saxony, northwest Germany, where grid expansion woes can affect project timelines.

The hydrogen produced using renewables will be utilized in processes connected to the smelting of iron ore. Total costs for the project come to roughly 50 million euros (around $59.67 million), with the building of the electrolyzers subsidized by state-owned KfW, while a national net-zero roadmap could reduce electricity costs over time.

"Green gases have the wherewithal to become 'staple foodstuff' for the transition to alternative energies and make a considerable contribution to decarbonizing industry, mobility and heat," E.ON's CEO, Johannes Teyssen, said in a statement issued Thursday.

"The jointly realized project symbolizes a milestone on the path to virtually CO2 free production and demonstrates that fossil fuels can be replaced by intelligent cross-sector linking," he added.

According to the International Energy Agency, the iron and steel sector is responsible for 2.6 gigatonnes of direct carbon dioxide emissions each year, a figure that, in 2019, was greater than the direct emissions from sectors such as cement and chemicals. 

It adds that the steel sector is "the largest industrial consumer of coal, which provides around 75% of its energy demand."

The project in Germany is not unique in focusing on the role green hydrogen could play in steel manufacturing.

Across Europe, projects are also exploring natural gas pipe storage to balance intermittent renewables and enable sector coupling.

H2 Green Steel, a Swedish firm backed by investors including Spotify founder Daniel Ek, plans to build a steel production facility in the north of the country that will be powered by what it describes as "the world's largest green hydrogen plant."

In an announcement last month the company said steel production would start in 2024 and be based in Sweden's Norrbotten region.

Other energy-intensive industries are also looking into the potential of green hydrogen, and examples such as Schott's green power shift show parallel decarbonization. A subsidiary of multinational building materials firm HeidelbergCement has, for example, worked with researchers from Swansea University to install and operate a green hydrogen demonstration unit at a site in the U.K.

Related News

• Electricity Forum News

• Power Generation News

Canada Net-Zero Electricity 2035 aligns policy and investments with renewables, wind, solar, hydro, storage, and transmission to power electrification of EVs and heat pumps, guided by a stringent clean electricity standard and carbon pricing.

Key Points

A 2035 plan for a zero-emissions grid using renewables, storage and transmission to electrify transport and homes.

✅ Wind, solar, and hydro backed by battery storage and reservoirs

✅ Interprovincial transmission expands reliability and lowers costs

✅ Stringent clean electricity standard and full carbon pricing

By Tom Green
Senior Climate Policy Advisor
David Suzuki Foundation

Electric vehicles are making inroads in some areas of Canada. But as their numbers grow, will there be enough electrical power for them, and for all the buildings and the industries that are also switching to electricity?

Canada – along with the United States, the European Union and the United Kingdom – is committed to a “net-zero electricity grid by 2035 policy goal”. This target is consistent with the Paris Agreement’s ambition of staying below 1.5 C of global warming, compared with pre-industrial levels.

This target also gives countries their best chance of energy security, as laid out in landmark reports over the past year from the International Energy Agency and the Intergovernmental Panel on Climate Change. A new federal regulation in the form of a clean electricity standard is being developed, but will it be stringent enough to set us up for climate success and avoid dead ends?

Canada starts this work from a relatively low emissions-intensity grid, powered largely by hydroelectricity. However, some provinces such as Alberta, Saskatchewan, Nova Scotia and New Brunswick still have predominantly fossil fuel-powered electricity. Plus, there is a risk of more natural gas generation of electricity in the coming years in most provinces without new federal and provincial regulations.

This means the transition of Canada’s electricity system must solve two problems at once. It must first clean up the existing electricity system, but it must also meet future electricity needs from zero-emissions sources while overall electricity capacity doubles or even triples by 2050.

Canada has enormous potential for renewable generation, even though it remains a solar power laggard in deployment to date. Wind, solar and energy storage are proven, affordable technologies that can be produced here in Canada, while avoiding the volatility of global fossil fuel markets.

As wind and solar have become the cheapest forms of electricity generation in history, we’re already seeing foreign governments and utilities ramp up renewable projects at the pace and scale that would be needed here in Canada, highlighting a significant global electricity market opportunity for Canadian firms at home. In 2020, 280 gigawatts of new capacity was added globally – a 45 per cent increase over the previous year. In Canada, since 2010, annual growth in renewables has so far averaged less than three per cent.

So why aren’t we moving full steam – or electron – ahead? With countries around the world bringing in wind and solar for new generation, why is there so much delay and doubt in Canada, even as analyses explore why the U.S. grid isn’t 100% renewable and remaining barriers?

The modelling team drew on a dataset that accounts for how wind and solar potential varies across the country, through the weeks of the year and the hours of each day. The models provide solutions for the most cost-effective new generation, storage and transmission to add to the grid while ensuring electricity generation meets demand reliably every hour of the year.

The David Suzuki Foundation partnered with the University of Victoria to model the electricity grid of the future.

To better understand future electricity demand, a second modelling team was asked to explore a future when homes and businesses are aggressively electrified; fossil fuel furnaces and boilers are retired and replaced with electric heat pumps; and gasoline and diesel cars are replaced by electric vehicles and public transit. It also dialed up investments in energy efficiency to further reduce the need for energy. These hourly electricity-demand projections were fed back to the models developed at the University of Victoria.

The results? It is possible to meet Canada’s needs for clean electricity reliably and affordably through a focus on expanding wind and solar generation capacity, complemented with new transmission connections between provinces, and other grid improvements.

How is it that such high levels of variable wind and solar can be added to the grid while keeping the lights on 24/7? The model took full advantage of the country’s existing hydroelectric reservoirs, using them as giant batteries, storing water behind the dams when wind and solar generation was high to be used later when renewable generation is low, or when demand is particularly high. The model also invested in more transmission to enable expanded electricity trade between provinces and energy storage in the form of batteries to smooth out the supply of electricity.

Not only is it possible, but the renewable pathway is the safe bet.

There’s no doubt it will take unprecedented effort and scale to transform Canada’s electricity systems. The high electrification pathway would require an 18-fold increase over today’s renewable electricity capacity, deploying an unprecedented amount of new wind, solar and energy storage projects every year from now to 2050. Although the scale seems daunting, countries such as Germany are demonstrating that this pace and scale is possible.

The modelling also showed that small modular nuclear reactors (SMRs) are neither necessary nor cost-effective, making them a poor candidate for continued government subsidies. Likewise, we presented pathways with no need for continued fossil fuel generation with carbon capture and storage (CCS) – an expensive technology with a global track record of burning through public funds while allowing fossil fuel use to expand and while capturing a smaller proportion of the smokestack carbon than promised. We believe that Canada should terminate the significant subsidies and supports it is giving to fossil fuel companies and redirect this support to renewable electricity, energy efficiency and energy affordability programming.

The transition to clean electricity would come with new employment for people living in Canada. Building tomorrow’s grid will support more than 75,000 full-time jobs each year in construction, operation and maintenance of wind, solar and transmission facilities alone.

Regardless of the path chosen, all energy projects in Canada take place on unceded Indigenous territories or treaty land. Decolonizing power structures with benefits to Indigenous communities is imperative. Upholding Indigenous rights and title, ensuring ownership opportunities and decision-making and direct support for Indigenous communities are all essential in how this transition takes place.

Wind, solar, storage and smart grid technologies are evolving rapidly, but our understanding of the possibilities they offer for a zero-emissions future, including debates over clean energy’s dirty secret in some supply chains, appears to be lagging behind reality. As the Institut de L’énergie Trottier observed, decarbonization costs have fallen faster than modellers anticipated.

The shape of tomorrow’s grid will largely depend on policy decisions made today. It’s now up to people living in Canada and their elected representatives to create the right conditions for a renewable revolution that could make the country electric, connected and clean in the years ahead.

To avoid a costly dash-to-gas that will strand assets and to secure early emissions reductions, the electricity sector needs to be fully exposed to the carbon price. The federal government’s announcement that it will move forward with a clean electricity standard – requiring net-zero emissions in the electricity sector by 2035 – will help if the standard is stringent.

Federal funding to encourage provinces to expand interprovincial transmission, including recent grid modernization investments now underway will also move us ahead. At the provincial level, electricity system governance – from utility commission mandates to electricity markets design – needs to be reformed quickly to encourage investments in renewable generation. As fossil fuels are swapped out across the economy, more and more of a household’s total energy bill will come from a local electric utility, so a national energy poverty strategy focused on low-income and equity-seeking households must be a priority.

The payoff from this policy package? Plentiful, reliable, affordable electricity that brings better outcomes for community health and resilience while helping to avoid the worst impacts of climate change.

Related News

• Electricity Forum News

• Renewable Energy News

Microgrid solar outage algorithms optimize renewable energy during blackouts using grid-forming inverters, islanding control, demand forecasting, and energy storage from batteries and EVs, improving reliability by up to 35% for resilient power sharing.

Key Points

Algorithms that island homes, forecast demand, and prioritize critical loads using storage and grid-forming inverters.

✅ Disconnects inverters to form resilient neighborhood microgrids

✅ Forecasts solar, wind, and demand; allocates energy fairly

✅ Uses EVs and batteries; boosts reliability by up to 35%

Some people who have solar panels on their roof are under the impression that they can use them to power their home in the case of an outage, but that simply is not the case. Homes do remain connected to the grid during outages, as U.S. power outage risks grow, but the devices tasked with managing solar panels are normally turned off due to safety concerns. This permanent grid connection essentially prevents homeowners from drawing on the power that their own renewable energy resources generate.

This could be about to change, however, thanks to the efforts of a team of University of California San Diego engineers who have come up with algorithms that would enable homes to share and use their power in outages by disconnecting solar inverters from the grid. Their algorithms work with the existing technology and would have the added benefit of boosting the system’s reliability by as much as 35 percent.

The genius of their work lies in the ability of the algorithm to prioritize the distribution of power from the renewable resources in outages. Their equation considers forecasts for wind and solar power generation to address clean energy intermittency challenges and the available energy storage, including batteries and electric vehicles. It combines this information with the projected energy usage of residents and the amount of energy the homes are able to produce. It can be programmed to prioritize in several different ways, the most vital of which is by favoring those who need power urgently, such as those using life support equipment. It could also prioritize those who are willing to pay extra or reward those who typically generate an energy surplus during normal operations.

Learning lessons from past outages

Lead author Abdulelah H. Habib said the engineers were inspired to find a way to use the renewable power in outages by the events of Hurricane Sandy. This storm affected more than eight million people on the nation’s East Coast, some of whom were left without power for as long as two weeks.

According to the researchers, most customers prefer sharing community-scale storage systems over having systems in each home because of the lower costs. One of the paper’s senior authors, Raymond de Callafon, said that homes that are connected together are not only more resilient in power outages but they also happen to be more resilient to price fluctuations.

Each home needs to be equipped with special circuit breakers that can be remotely controlled, while utilities would need to install some communications methods so the power systems within a particular residential cluster can communicate amongst themselves. They also need a “grid forming inverter” to help them connect to one another and manage excess solar on networks safely.

One stumbling block that will have to be overcome is the current regulations. Most states do not allow individual homeowners to sell power to other homeowners, so there would have to be some adjustments to make this a reality.

Solar power growing in popularity

Solar power’s popularity is currently on the rise, and reductions in cost as the technology improves are only expected to drive this growth even further. REC CEO Steve O’Neil told CNBC that the installation rates of solar double every two years, a trend that informs residential solar economics for homeowners even though just two percent of the planet’s electricity comes from converting sunlight to energy. This means there is plenty of room for expansion. The world’s current solar capacity is 305 gigawatts, compared to just 50 gigawatts in 2010.

In addition, he pointed out that the price of solar energy has dropped by 70 percent since the year 2010 and continues to fall; it costs around eight cents per kilowatt hour at the moment. Another factor that could boost adoption is storage improvements, driven by affordable solar batteries that expand capacity, which will allow solar energy to be used even on overcast days.

Related News

• Electricity Forum News

• Renewable Energy News