Vehicle-to-grid (V2G) technology lets your EV send power back to your home or the grid, turning your car into a massive battery that can cut your energy bills or even earn you money. It sounds brilliant, and after years of trials and hype, you can finally buy V2G chargers for home use in the UK. The catch? Your options are still limited, the costs are substantial, and only a handful of cars are compatible.
Here’s what’s actually available right now, what it’ll cost you, and whether it makes sense for anyone beyond the keenest early adopters.
V2G Chargers You Can Actually Buy
At the time of writing, there are three main V2G home chargers available for UK households:
The Wallbox Quasar 2 is probably the most accessible option. It’s a 7.4kW bidirectional charger that can both charge your car and send power back to your home. Pricing typically sits around £3,500 to £4,000 for the unit itself, though this varies depending on the installer. It uses the CHAdeMO connector, which immediately limits which cars you can use it with.
The Indra V2H charger is another CHAdeMO-based option, used in various trials across the UK and now available commercially. Expect similar pricing to the Quasar 2, with installation costs on top.
Finally, there’s the Fermata Energy FE-15, which has been deployed in commercial settings and is starting to appear in domestic installations. Again, CHAdeMO only, and pricing runs in the same ballpark.
Installation costs add another £500 to £1,500 depending on your home’s electrical setup, how far the charger sits from your fuse box, and whether you need any upgrades to accommodate bidirectional flow. You’ll also need to factor in roughly £300 to £500 for any necessary smart meter or energy management kit to make the system actually useful.
Which Cars Are Compatible?
This is where V2G gets frustrating. The technology relies on bidirectional charging capability, and most EVs simply don’t have it yet.
Your current options in the UK include the Nissan Leaf (which has supported CHAdeMO V2G for years), the Nissan Ariya, the Nissan e-NV200 van if you can still find one, and the Mitsubishi Outlander PHEV. That’s essentially it for CHAdeMO.
The situation should improve significantly over the next year or two as CCS-based bidirectional charging arrives. Several manufacturers including Volkswagen, Ford, Hyundai, and Kia have announced V2G-capable models coming to Europe, but compatible CCS home chargers are still in the final stages of approval and rollout. If you’re buying today, you’re basically looking at a Nissan.
What You Can Actually Do With V2G
Once installed, a V2G charger lets you use your EV’s battery to power your home during expensive peak electricity periods, charging the car when rates are cheap (typically overnight) and then running your house on that stored power during the day or evening.
With a typical EV battery holding 40 to 65kWh, you’ve got substantial storage. A 60kWh battery could theoretically run an average UK home for two days, though you’d never drain your car battery completely unless you fancied being stranded.
More realistically, you might use 10 to 15kWh per day from your car to cover peak usage, keeping plenty of range for actual driving. On an Octopus Agile tariff or similar time-of-use arrangement, the difference between cheap night rates (sometimes as low as 7p per kWh) and peak rates (which can hit 30p or more) adds up.
Does the Economics Actually Stack Up?
Here’s the honest answer: not yet for most people.
A V2G system might cost you £4,500 to £5,500 all in. If you’re on a time-of-use tariff and can shift 10kWh per day from cheap to expensive periods with a 20p per kWh difference, you’re saving about £2 per day or roughly £730 per year. That’s a six to eight year payback period, assuming electricity price differences remain consistent and nothing breaks.
Factor in that battery warranties sometimes don’t cover V2G use (check carefully), and you’re adding extra charge cycles to your car’s battery, which could theoretically reduce its lifespan, though evidence from Nissan Leaf trials suggests the impact is minimal with modern thermal management.
Some energy suppliers offer V2G tariffs with additional payments for providing grid services. Octopus Energy has run trials, and EDF has V2G programmes. These can add another £200 to £400 per year if you’re happy to let the energy company control when your car charges and discharges. That improves the economics, but you’re still looking at a five year payback minimum.
Who Should Actually Consider V2G Right Now?
If you already own a compatible Nissan, have a time-of-use energy tariff, and you’re comfortable with technology that’s still maturing, V2G might make sense. The financial case is marginal, but you get genuine energy independence and blackout protection (your car can run essential circuits even if the grid goes down).
For everyone else, I’d wait. CCS bidirectional charging is coming, which will work with far more vehicles. Charger prices should drop as more manufacturers enter the market. And critically, as V2G becomes more common, energy suppliers will offer better tariffs that make the economics properly compelling rather than just interesting.
The technology works, which is genuinely exciting after years of trials. But unless you’re an early adopter who values the technology for its own sake, give it another year or two. The hardware, vehicle choice, and financial incentives will all be significantly better, and you won’t be stuck with a £4,000 CHAdeMO charger when the industry has moved to CCS.