Bidirectional charging, also known as vehicle-to-home (V2H) or vehicle-to-grid (V2G), lets your EV work as a giant home battery. Instead of just taking power from the grid, your car can send electricity back to run your house during peak price periods or power outages. After years of being ‘just around the corner’, it’s finally practical in the UK. Here’s what you actually need and what it’ll cost you.
Which Cars Can Do It?
This is where it gets fiddly, because not all EVs with bidirectional capability work with all chargers. The technology depends on both the car supporting the right protocol and the charger speaking the same language.
Currently available V2H-capable cars in the UK include the MG ZS EV Long Range, MG4 Extended Range, Nissan Leaf (which has supported V2H for years), Hyundai Ioniq 5, Hyundai Ioniq 6, Kia EV6, Genesis GV60, and the Ford F-150 Lightning for the few who’ve imported one. The Renault 5 E-Tech arriving later in 2026 will also support bidirectional charging, as will the updated Volkswagen ID. models rolling out this year.
The catch is that most of these use different charging standards. The Nissan Leaf uses CHAdeMO, which is being phased out for rapid charging but still works perfectly well for home V2H. Most newer vehicles, including the MGs, Hyundais, and Kias, use CCS (Combined Charging System) with bidirectional capability. This matters because you need a charger that matches your car’s plug and protocol.
The Hardware You’ll Need
You cannot do V2H with a standard home charger. You need a bidirectional charger specifically designed for the job, and these are significantly more expensive than the typical wallbox.
For CCS-based vehicles, the main options in the UK are the Wallbox Quasar 2 (around £4,500), the indra V2X charger (approximately £5,200), and the Kaluza V2G charger from OVO Energy (pricing varies depending on whether you’re an OVO customer). For CHAdeMO vehicles like the Leaf, the older Wallbox Quasar and the Nichicon EV Power Station (around £3,800) are your choices, though availability is increasingly limited as the market shifts to CCS.
\p>Beyond the charger itself, you’ll likely need upgrades to your home’s electrical setup. Most installations require a new consumer unit with specific protection devices, an isolation switch, and potentially an upgrade to your incoming supply if you’ve got an older property. Budget at least £1,000 to £2,000 for these ancillary electrical works, though it varies wildly depending on your existing setup.
You’ll also need a smart meter and a compatible energy tariff to make the economics work. More on that shortly.
Installation and Total Costs
Installation of a bidirectional charger is more complex than a standard wallbox and must be done by an installer certified for this specific work. You’re not just connecting a charger; you’re essentially making your car part of your home’s electrical system.
Installation typically costs between £800 and £1,500 on top of the hardware price, depending on your location and the complexity of your setup. If you need significant electrical upgrades, that figure can climb higher.
Total setup cost, then, is realistically between £6,000 and £8,000 for most people with a CCS vehicle. That’s a lot more than the £800 to £1,200 you’d pay for a standard 7kW home charger.
Do the Economics Actually Work?
This is where it gets interesting. The payback depends entirely on how you use the system and which energy tariff you’re on.
Octopus Energy’s Intelligent Octopus Flux tariff currently offers the best opportunity for V2H in the UK. At the time of writing, you can charge at around 7p per kWh during the cheapest overnight periods and export back to the grid at roughly 27p per kWh during peak times. If you’re using your car as a home battery, the profit margin is approximately 20p per kWh cycled through the system.
Let’s say you cycle 15 kWh per day through your car (charging overnight, discharging during peak evening hours). That’s a saving of about £3 per day, or roughly £1,100 per year. At that rate, you’re looking at a payback period of five to seven years compared to just having a standard charger and not optimising your usage.
However, that assumes you’re disciplined about charging and discharging daily, that your car is regularly at home during peak hours, and that energy price differentials remain this favourable. If you use your car less strategically, or if you’re frequently away from home, the payback stretches considerably.
It’s also worth noting that you’re adding charge cycles to your battery. Modern EV batteries are robust, and the degradation from an extra 15 kWh cycle per day is minimal over the typical ownership period, but it’s not zero. Most manufacturers warrant batteries for eight years or 100,000 miles, and typical V2H usage won’t void this, but it’s worth checking your specific warranty terms.
What About Power Cuts?
One advantage that doesn’t show up in the payback calculation is backup power during outages. With a proper V2H setup, your car can keep your lights on, your fridge running, and your heating working when the grid goes down. For most of the UK, power cuts are rare and short, so this is nice to have rather than essential. But if you live somewhere with less reliable supply, or if you work from home and cannot afford downtime, it adds genuine value.
A typical EV with a 60 kWh battery could run an average UK home for two to three days during an outage, assuming you’re sensible about energy use and not running power-hungry appliances unnecessarily.
Is It Worth It Right Now?
If you’re buying a V2H-capable EV anyway and you’re on the right tariff, it’s genuinely worth considering, particularly if you’re at home regularly during peak hours. The technology works, the hardware is mature (if expensive), and the tariffs make it financially viable for the right usage pattern.
But I wouldn’t buy a specific car just for its V2H capability, and I wouldn’t stretch the budget painfully to afford the installation. The economics are promising but not transformational, and a lot depends on energy prices remaining favourable. If your main interest is in reducing bills, you’ll get better returns from solar panels and loft insulation.
That said, if you’re the kind of person who gets a kick out of optimising your energy use and you like the idea of your car earning its keep while it’s parked, V2H in 2026 is finally practical enough to recommend. Just go in with realistic expectations about payback periods.