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Vehicle-to-Grid (V2G) enables bidirectional charging, letting EV batteries supply smart grid services to large buildings, support renewable energy integration, reduce battery degradation, and optimize demand response for efficient, resilient power management.

Key Points

Vehicle-to-Grid (V2G) is bidirectional EV charging that feeds the grid and buildings while protecting battery health.

✅ Uses idle EVs to power buildings and support renewables

✅ Smart algorithms minimize lithium-ion battery degradation

✅ Provides grid services, demand response, and peak shaving

Stored energy from electric vehicles (EVs) can be used to power large buildings -- creating new possibilities for the future of smart, renewable energy -- thanks to ground-breaking battery research from WMG at the University of Warwick.

Dr Kotub Uddin, with colleagues from WMG's Energy and Electrical Systems group and Jaguar Land Rover, has demonstrated that vehicle-to-grid (V2G) technology can be intelligently utilised to take enough energy from idle EV batteries to be pumped into the grid and power buildings -- without damaging the batteries.

This new research into the potentials of V2G shows that it could actually improve vehicle battery life by around ten percent over a year.

For two years, Dr Uddin's team analysed some of the world's most advanced lithium ion batteries used in commercially available EVs -- and created one of the most accurate battery degradation models existing in the public domain -- to predict battery capacity and power fade over time, under various ageing acceleration factors -- including temperature, state of charge, current and depth of discharge.

Using this validated degradation model, Dr Uddin developed a 'smart grid' algorithm, which supports grid coordination and intelligently calculates how much energy a vehicle requires to carry out daily journeys, and -- crucially -- how much energy can be taken from its battery without negatively affecting it, or even improving its longevity.

The researchers used their 'smart grid' algorithm to see if they could power WMG's International Digital Laboratory -- a large, busy building which contains a 100-seater auditorium, two electrical laboratories, teaching laboratories, meeting rooms, and houses approximately 360 staff -- with vehicle-to-building charging from EVs parked on the University of Warwick campus.

They worked out that the number of EVs parked on the campus (around 2.1% of cars, in line with the UK market share of EVs) could spare the energy to power this building, acting as capacity on wheels for electricity networks -- and that in doing so, capacity fade in participant EV batteries would be reduced by up to 9.1%, and power fade by up to 12.1% over a year.

It has previously been thought that extracting energy from EVs with V2G technology causes their lithium ion batteries to degrade more rapidly.

Dr Uddin's group (along with collaborators from Jaguar Land Rover) have proved, however, that battery degradation is more complex -- and this complexity, in operation, can be exploited to improve a battery's lifetime.

Given that battery degradation is dependent on calendar age, capacity throughput, temperature, state of charge, current and depth of discharge, V2G is an effective tool that can be used to optimise a battery's conditions such that degradation is minimised. Hence, taking excess energy from an idle EV to power the grid actually keeps the battery healthier for longer.

Dr Uddin commented on the research:

"These findings reinforce the attractiveness of vehicle-to-grid technologies to automotive Original Equipment Manufacturers: not only is vehicle-to-grid an effective solution for grid support -- and subsequently a tidy revenue stream -- but we have shown that there is a real possibility of extending the lifetime of traction batteries in tandem.

"The results are also appealing to policy makers interested in grid decarbonisation and addressing grid challenges from rising EVs across power systems."

The research, 'On the possibility of extending the lifetime of lithium-ion batteries through optimal V2G facilitated by an integrated vehicle and smart-grid system' is published in Energy.

It was funded by the Engineering and Physical Sciences Research Council and the WMG centre High Value Manufacturing Catapult, in partnership with Jaguar Land Rover.

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Toronto EV Discovery Centre offers hands-on EV education, on-site test drives, and guidance on Ontario incentives, rebates, charging, and dealerships, helping drivers switch to electric vehicles and cut emissions through provincial climate programs.

Key Points

A public hub in Toronto for EV education, test drives, and guidance on Ontario incentives, rebates, and charging options.

✅ Free entry; neutral info on EV models and charging.

✅ On-site test drives; referrals to local dealerships.

✅ Backed by Ontario's cap-and-trade, utilities, and partners.

A centre where people can learn about electric vehicles and take them for a test drive has opened in Toronto, as similar EV events in Regina highlight growing public interest.

Ontario's Environment Minister Glen Murray says the Plug'n Drive Electric Vehicle Discovery Centre is considered the first of its kind and his government has pitched in $1 million to support it, alongside efforts to expand charging stations across Ontario.

Ontario's Environment Minister Glen Murray helps cut the ribbon on the first ever electric vehicle discovery centre. (CBC News)

Murray says the goal of the centre is to convince people to switch to electric vehicles in order to fight climate change, a topic gaining momentum in southern Alberta as well.

Visitors to the centre learn about how electric vehicles work and about Ontario government subsidies and rebates for electric car owners, as well as the status of the provincial charging network and infrastructure.

Visitors can test-drive vehicles from different companies and those who see something they like will receive a referral to an electric car dealership in their area.

The province hopes to have electric vehicles make up five per cent of all new vehicles sold by 2020. (Oliver Walters/CBC)

The Ontario government's Climate Change Action Plan includes a goal to have electric vehicles make up five per cent of all new vehicles sold by 2020, amid debate over whether the next wave will run on clean power in Ontario, and the discovery centre is part of that plan.

The centre is free for visitors. It's a public-private partnership funded from the provincial government's cap-and-trade revenue, with other funding from TD Bank Group, Ontario Power Generation, Power Workers' Union, Toronto Hydro and Bruce Power.

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Electric Vehicle Market Growth accelerated as EV adoption hit 2 million in 2016, per IEA, led by China, Tesla momentum, policy incentives, charging infrastructure buildout, and diesel decline under Paris Agreement goals.

Key Points

EV adoption rose to 2 million in 2016, driven by policy, China, and charging buildout, yet still only 0.2% of cars.

✅ 2M EVs on roads in 2016; 60% YoY growth

✅ China led with >40% of global EV sales

✅ Policies target 30% share by 2030 via EVI

The number of electric vehicles on the road rocketed to 2 million in 2016 as the age of electric cars accelerates after being virtually non-existent just five years ago, according to the International Energy Agency.

Registered plug-in and battery-powered vehicles on roads worldwide rose 60% from the year before, according to the Global EV Outlook 2017 report from the Paris-based IEA. Despite the rapid growth, electric vehicles still represent just 0.2% of total light-duty vehicles even as U.S. EV sales continue to soar into 2024, suggesting a turning point.

“China was by far the largest electric car market, accounting for more than 40% of the electric cars sold in the world and more than double the amount sold in the United States,” the IEA wrote in the report published Wednesday. “It is undeniable that the current electric car market uptake is largely influenced by the policy environment.”

A multi government program called the Electric Vehicle Initiative on Thursday will set a goal for 30% market share for battery power cars, buses, trucks and vans by 2030, aligning with projections that driving electric cars within a decade could become commonplace, according to IEA. The 10 governments in the initiative include China, France, Germany, the UK and US.

India, which isn’t part of the group, said last month that it plans to sell only electric cars by the end of the next decade. Countries and cities are looking to electric vehicles to help tackle their air pollution problems.

In order to limit global warming to below 2 degrees Celsius (3.6 degrees Fahrenheit), the target set by the landmark Paris Agreement on climate change, the world will need 600 million electric vehicles by 2040, according to the IEA.

After struggling for consumer acceptance, Tesla Inc. has made electric vehicles cool and trendy, and is pushing into the mass market as the United States approaches a tipping point for mass adoption with the new Model 3 sedan.

Consumer interest and charging infrastructure, as well as declining demand for diesel cars in the wake of Volkswagen’s emissions scandal, has spurred massive investments in plug-in cars, and across Europe the share of electric cars grew during virus lockdown months, reinforcing this momentum. An electrical vehicle “cool factor” could spur sales to 450 million by 2035, according to BP chief economist Spencer Dale.

Volkswagen, the world’s largest automaker, plans to roll out four affordable electric vehicles in the coming years as part of a goal to sell more than 2 million battery-powered vehicles a year by 2025. Mercedes-Benz accelerated the introduction of ten new electric vehicles by three years to 2022 to take on Tesla as the dominance of the combustion engine gradually fades. 

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San Diego Gas & Electric EV incentives deliver $10,000 utility discounts plus a $200 EV Climate Credit, stackable with California rebates and federal tax credits on BMW i3 and Nissan Leaf purchases through participating dealers.

Key Points

Utility-backed rebates that cut EV purchase costs and stack with California and federal tax credits for added savings.

✅ $10,000 off BMW i3 or Nissan Leaf via SDG&E partner dealers

✅ Stack with $7,500 federal and up to $4,500 California rebates

✅ $200 annual EV Climate Credit for eligible account holders

For southern California residents, it's an excellent time to start considering the purchase of a BMW i3 or Nissan Leaf electric car as EV sales top 20% in California today.

San Diego Gas & Electric has joined a host of other utility companies in the state in offering incentives towards the purchase of an i3 or a Leaf as part of broader efforts to pursue EV grid stability initiatives in California.

In total, the incentives slash $10,000 from the purchase price of either electric car, and an annual $200 credit to reduce the buyer's electricity bill is included through the EV Climate Credit program, which can complement home solar and battery options for some households.

SDG&E's incentives may be enough to sway some customers into either electric car, but there's better news: the rebates can be combined with state and federal incentives.

The state of California offers a $4,500 purchase rebate for qualified low-income applicants, while others are eligible for $2,500

Additionally, the federal government income-tax credit of up to $7,500 can bring the additional incentives to $10,000 on top of the utility's $10,000.

While the federal and state incentives are subject to qualifications and paperwork established by the two governments, the utility company's program is much more straight forward.

SDG&E simply asks a customer to provide a copy of their utility bill and a discount flyer to any participating BMW or Nissan dealership.

Additional buyers who live in the same household as the utility's primary account holder are also eligible for the incentives, although proof of residency is required.

Nissan is likely funding some of the generous incentives to clear out remaining first-generation Nissan Leafs.

The 2018 Nissan Leaf will be revealed next month and is expected to offer a choice of two battery packs—one of which should be rated at 200 miles of range or more.

SDG&E joins Southern California Edison as the latest utility company to offer discounts on electric cars as California aims for widespread electrification and will need a much bigger grid to support it, though SCE has offered just $450 towards a purchase.

However, the $450 incentive can be applied to new and used electric cars.

Up north, California utility company Pacific Gas & Electric offers $500 towards the purchase of an electric car as well, and is among utilities plotting a bullish course for EV charging infrastructure across the state today.

Two Hawaiian utilities—Kaua'i Island Utility Cooperative and the Hawaiian Electric Company—offered $10,000 rebates similar to those in San Diego from this past January through March.

Those rebates once again were destined for the Nissan Leaf.

SDG&E's program runs through September 30, 2017, or while supplies of the BMW i3 and Nissan Leaf last at participating local dealers.

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Australian VRF Battery Market sees a commercial-scale solar and storage demonstration by Energy Made Clean, Sumitomo Electric, and TNG, integrating vanadium redox flow systems with microgrids for grid-scale renewable energy reliability across Australia.

Key Points

A growing sector deploying vanadium redox flow batteries for scalable, long-life energy storage across Australia.

✅ Commercial demo by EMC, Sumitomo Electric, and TNG

✅ Integrates solar PV with containerized VRF systems

✅ Targets microgrids and grid-scale renewable reliability

Carnegie Wave Energy’s 100 per cent owned subsidiary, Energy Made Clean, is set to develop and demonstrate a commercial-scale solar and battery storage plant in Australia, after entering into a joint venture targeting Australia’s vanadium redox flow (VRF) battery market.

Carnegie said on Tuesday that EMC had signed a memorandum of understanding with Japanese company Sumitomo Electric Industries and ASX-listed TNG Limited to assess the potential applications of VRF batteries through an initial joint energy storage demonstration project in Australia.

The deal builds on a June 2015 MOU between EMC and emerging strategic metals company TNG, to establish the feasibility of Vanadium Redox batteries. And it comes less than two months after Carnegie took full ownership of the Perth-based EMC, which has established itself as one of the Australia’s foremost micro-grid and battery storage businesses, reflecting momentum in areas such as green hydrogen microgrids internationally.

Energy Made Clean’s main role in the partnership will be to identify commercial project site opportunities, while also designing and supplying a compatible balance of plant – likely to include solar PV – to integrate with the VRF containerised system being supplied by Sumitomo.

The demonstration will be of commercial size, to best showcase Sumitomo’s technology, the companies said; with each party contributing to their core competencies, and subsequently cooperating on the marketing and sales of VRF batteries.

As we have noted on RE before, vanadium redox flow batteries are tipped to be one of the key players in the booming global energy storage market, alongside innovations like gravity storage investment, as more and more renewable energy sources are brought onto grids around the world.

The batteries are considered uniquely suited to on- and off-grid energy storage applications, and emerging models like vehicle-to-building power, due to their scalability and long asset lives, with deep and very high cycling capability.

Australia, as well as being a key market for battery storage uptake, has seen a recent grid rule change that could impact big batteries, and has been noted for its potential to become a top global producer of vanadium – a metal found in a range of mineral deposits.

A number of Australian companies are already active in the local vanadium redox flow battery market, including miner Australian Vanadium – which recently inked a deal with Germany battery maker Gildemeister Energy Storage to sell its CellCube range of VRF batteries – and Brisbane based battery maker Redflow.

Energy Made Clean CEO John Davidson said the signing of the MOU would bring key industry innovators together to help revolutionise the vanadium redox flow battery market in Australia.

“This strategic MoU represents a compelling three-way tie-up of an emerging miner, a manufacturer and an integrator to accelerate the development of a major new energy growth market,” Davidson said.  

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NB Power seasonal electricity rates face backlash amid smart grid delays, meter reading limits, and billing dispute risks, as consultants recommend AMI smart meters for accurate winter-summer pricing, time-of-use alignment, and consumer protection.

Key Points

NB Power seasonal electricity rates raise winter prices and lower summer prices to match costs, using accurate AMI metering.

✅ Requires midnight meter reads without AMI, increasing billing disputes.

✅ Shifts costs to electric-heat homes during high winter demand.

✅ Recommended to wait for smart grid AMI for time-of-use accuracy.

A consultant hired by NB Power is warning of significant consumer "backlash" if the utility is made to establish seasonal rates for electricity, as seen in B.C. and Quebec smart meter disputes among customers.

The consultant's report even suggests customers might have to read their own power meters at midnight twice a year — on April Fool's and Halloween — to make the system work.

"Virtually all bills will have errors ... billing disputes can be expected to increase, as seen in a $666 smart meter bill in N.S. that raised concerns, possibly dramatically, and there will be no means of resolving disputes in a satisfactory way," reads a report by Elenchus Research Associates that was commissioned by NB Power and filed with the Energy and Utilities Board on Thursday.

NB Power is in the middle of a year-long "rate design" review ordered by the EUB that is focused in part on whether the utility should charge lower prices for electricity in the summer and higher prices in the winter to better reflect the actual cost of serving customers.

New network of meters needed

Elenchus was asked to study how that might work but the company is arguing against any switch until NB Power upgrades its entire network of power meters, given old meters in N.B. have raised concerns.

Elenchus said seasonal rates require an accurate reading of every customer's power meter at midnight on March 31 and again on Oct. 31, the dates when power rates would switch between winter and summer prices.

A consultant's report says NB Power doesn't have the manpower to properly read meters if it brings in seasonal rates. (CBC)

But NB Power does not have the sophisticated infrastructure in place to read meters remotely, or the manpower to visit every customer location on the same day, so Elenchus said the utility would have to guesstimate bills or rely on the technical savvy and honesty of customers themselves.

"Customers could be asked to read their own meters late in the day on March 31 (and October 31)," suggested the report. "Aside from the obvious inconvenience and impracticality of that approach, NB Power would have no means of verifying the customers' meter reads."

Residential customers would see hike

Another looming controversy with seasonal rates is that it would raise costs for residential customers, especially to those who heat with electricity, a pressure seen with a 14% rate increase in Nova Scotia recently.

Elenchus estimated seasonal rates would add nearly $6 million to the cost of residential bills overall, with the largest increases flowing to those with baseboard heat.

Electric heat customers consume the majority of their power during the five months that would have the highest prices and Elenchus said that is another reason to wait for better power meters before proceeding.

NB Power has an ambitious plan to bring in a new meter system, and the consultant's report recommends waiting for that to happen before switching to seasonal rates. (Google Street View)

NB Power has an ambitious plan to upgrade meters and related infrastructure as part of its transformation to a "smart grid," but it is a multi-year plan.

Once in place the utility would be able to read meters remotely hour to hour, allowing power rates to be adjusted for times of the day and days of the week as well as seasonally.

Consumers will also have in-home pricing and consumption displays to help them manage their bills.

Elenchus said waiting for those meters will give electric heat customers a chance to avoid higher seasonal costs by letting them shift power consumption to lower-priced parts of the day.

"The introduction of seasonal rates would be more acceptable once AMI (advanced metering infrastructure) has been deployed," concludes the report.

A final hearing on NB Power's rate design, where seasonal rates and other changes will be considered, amid a power market overhaul debate in Alberta that industry is watching, is scheduled for next April.

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