What bidirectional charging is and how it differs from standard EV charging
Bidirectional charging lets electricity flow both into and out of your electric car’s battery. A standard unidirectional charger can only send power one way, from the grid into the car. With bidirectional charging, your EV effectively becomes a large home battery on wheels.
Bidirectional EV charging costs £800–£1,500 for the charger, plus £300–£600 installation. It turns your EV into a home battery for V2H or V2G use, saving up to £300 a year on electricity bills. Check OZEV grants for flat owners and renters.
- Bidirectional charging lets electricity flow both ways, turning your EV into a home battery.
- Vehicle-to-home (V2H) powers your house during peak hours or a power cut.
- Vehicle-to-grid (V2G) sells stored power back to the grid when prices are high.
- Compatible cars include Nissan Leaf, Hyundai Ioniq 5, MG4, and Ford F-150 Lightning.
- OZEV offers up to £350 grant for V2G chargers for flat owners and renters only.
- What bidirectional charging is and how it differs from standard EV charging
- Who qualifies for UK government grants for bidirectional EV charging in 2026
- Quick numbers – costs, savings, and grant amounts for bidirectional charging
- How to check if your home’s electrical system is compatible with bidirectional charging
- The direct answer – does bidirectional EV charging save you money in the UK in 2026?
- How to verify your installer and charger are certified for bidirectional charging
- What happens to your EV battery warranty if you use bidirectional charging
There are two main uses. Vehicle-to-home (V2H) powers your household circuits from the car battery during peak electricity hours or during a power cut. Vehicle-to-grid (V2G) sells stored power back to the national grid when demand and prices are high. Both require a compatible EV and a bidirectional-capable charger, such as the Wallbox Quasar 2, Indra V2G Pro, or OVO V2G unit. Compatible cars include the Nissan Leaf, Hyundai Ioniq 5, MG4, and Ford F-150 Lightning (Energy Saving Trust, 2026 Energy Saving Trust).
The UK grid still has limited V2G infrastructure, but several pilot schemes are active in 2026, including OVO Energy’s V2G trial with Nissan Leaf drivers (Ofgem, 2026 Ofgem).
Who qualifies for UK government grants for bidirectional EV charging in 2026
The Electric Vehicle Homecharge Scheme (EVHS) closed to new applications in March 2025. Its successor, the Electric Vehicle Chargepoint Grant, is available only to flat owners and people in rented accommodation (social or private) as of 2026 (GOV.UK, 2026 GOV.UK). For V2G-capable chargers, the Office for Zero Emission Vehicles (OZEV) offers a separate grant of up to £350 (or 75% of installation cost, whichever is lower) under the same scheme for landlords and flat-owners (GOV.UK, 2026 GOV.UK).
The Workplace Charging Scheme (WCS) provides up to £350 per socket for businesses, including bidirectional units, but only for employee and fleet use (GOV.UK, 2026 GOV.UK). Single-family homeowners with off-street parking no longer qualify for any direct government grant for home chargers as of 2026, unless they are a flat-owner or in rented accommodation (Energy Saving Trust, 2026 Energy Saving Trust).
Quick numbers – costs, savings, and grant amounts for bidirectional charging
| Item | Value (GBP/kWh/%) | Notes |
|---|---|---|
| Average cost of bidirectional charger (unit only) | £1,200–£2,500 | Varies by brand and capacity (7–22 kW) |
| Average installation cost (including electrics) | £500–£1,500 | May be higher for V2G compatibility |
| Maximum OZEV grant for flat/rented property | £350 per charger | 75% of cost, whichever lower |
| Typical annual saving from V2G (export tariff) | £200–£600 | Based on Octopus Flux or similar time-of-use tariff |
| Average battery capacity of a compatible EV | 40–77 kWh | e.g., Nissan Leaf 40 kWh, Hyundai Ioniq 5 77 kWh |
| Typical V2H discharge rate | 3–7 kW | Enough to run most household loads during peak |
Sources: Energy Saving Trust, 2026 (Energy Saving Trust); MCS, 2026 (MCS); Octopus Energy tariff data, 2026 (Octopus Energy).
How to check if your home’s electrical system is compatible with bidirectional charging
Bidirectional chargers require a compatible smart meter (SMETS2) to measure import and export for V2G tariffs. Older SMETS1 meters may need upgrading (Ofgem, 2026 Ofgem). The charger must be connected to a dedicated circuit with a Type B RCD or a DC-sensitive RCD, because bidirectional chargers can leak DC current (IET Wiring Regulations BS 7671:2025, Section 722).
Your property’s main fuse rating, typically 60–100 amps, must be sufficient to handle both the charger and normal household loads. An upgrade to 100 amps may be needed if your existing fuse is rated lower (Energy Networks Association, 2026 Energy Networks Association).
Does bidirectional EV charging save you money in the UK in 2026?
Yes, but only if you combine a bidirectional-capable charger with a time-of-use tariff that pays you for exporting electricity, such as Octopus Flux or OVO Energy’s V2G plan, and if your home has a smart meter. Typical savings range from £200 to £600 per year, based on a 40–60 kWh battery and daily discharge during peak hours (4–7 pm) (DESNZ, 2026 DESNZ).
Without a V2G tariff, bidirectional charging offers no direct financial benefit beyond backup power. Vehicle-to-home alone does not generate income, though it can reduce your peak-time electricity use if you charge the car overnight on a cheaper rate (Energy Saving Trust, 2026 Energy Saving Trust). How to switch to a time-of-use electricity tariff
How to verify your installer and charger are certified for bidirectional charging
The charger itself must be listed on the MCS (Microgeneration Certification Scheme) product directory for V2G or V2H capability. As of 2026, MCS covers bidirectional chargers under the “Electric Vehicle Smart Charge Point” category (MCS, 2026 MCS). The installer must be MCS-certified, or hold NICEIC or NAPIT registration with a specific EV charge point scope, to qualify for any grant (TrustMark, 2026 TrustMark).
For grid-connected V2G, the charger must also comply with G99 or G100 engineering recommendations for export limiting. Your installer should verify this during the site survey (Energy Networks Association, 2026 Energy Networks Association). Check the TrustMark register for accredited installers, as TrustMark is required for all government-funded chargepoint installations (TrustMark, 2026 TrustMark). How to find a certified EV charger installer
What happens to your EV battery warranty if you use bidirectional charging
Most manufacturers explicitly permit bidirectional charging under their standard battery warranty, but only with approved chargers. Nissan allows V2G on the Leaf with its own or listed third-party units (Nissan UK, 2026 Nissan UK). Hyundai and MG also permit bidirectional use with approved chargers (Hyundai UK, 2026 Hyundai UK; MG Motor UK, 2026 MG Motor UK).
Tesla does not currently offer bidirectional charging on any UK-market model as of 2026, so warranty is unaffected. Some manufacturers, such as Renault, limit bidirectional use to V2H only and exclude V2G from warranty coverage. You should check your specific vehicle’s warranty terms before installing a bidirectional charger (Energy Saving Trust, 2026 Energy Saving Trust).
Frequently Asked Questions
Bidirectional charging allows electricity to flow into and out of your EV battery. Unlike standard unidirectional chargers, it lets you use your car's battery to power your home (V2H) or sell energy back to the grid (V2G). The Energy Saving Trust confirms this requires a compatible EV and a bidirectional-capable charger.
Compatible cars include the Nissan Leaf, Hyundai Ioniq 5, MG4, and Ford F-150 Lightning. The Energy Saving Trust lists these as supporting V2G or V2H in 2026.
Bidirectional chargers cost between £800 and £1,500, with installation adding £300 to £600. The OZEV grant covers up to £350 for eligible flat owners and renters, as per GOV.UK.
Yes, but only flat owners and renters qualify for the Electric Vehicle Chargepoint Grant, which includes up to £350 for V2G chargers. Single-family homeowners no longer qualify, according to GOV.UK.
V2G (vehicle-to-grid) sells your car's stored power back to the national grid at high-demand times. V2H (vehicle-to-home) powers your household circuits during peak hours or a power cut. Both require a bidirectional charger, per the Energy Saving Trust.
