Vehicle-to-Grid (V2G) Explained: Your EV as a Home Battery
V2G technology lets your EV export electricity back to the grid or power your home. It's real, it's arriving in the UK, and for some drivers it could generate hundreds of pounds a year.
What Is V2G?
Vehicle-to-Grid (V2G) is bidirectional charging — instead of only drawing power from the grid into the car battery, the car can also push power back out. The EV becomes a large mobile battery that can:
- V2G: Export electricity to the grid during peak demand periods, earning payments from energy suppliers or grid operators
- V2H (Vehicle-to-Home): Power your home directly from the car battery — useful during outages or to use cheap off-peak electricity during peak hours
- V2L (Vehicle-to-Load): Power appliances directly from the car's charging port — already available on some vehicles (Hyundai IONIQ 5, Kia EV6)
A typical 75kWh EV battery charged cheaply overnight at 7p/kWh and exported during peak at 30p/kWh could theoretically earn £17 per cycle. Real V2G trial participants have reported earnings of £200–500 per year, with the system largely automated.
Which Vehicles Support V2G / Bidirectional Charging?
| Vehicle | V2G | V2H | V2L | Connector |
|---|---|---|---|---|
| Nissan Leaf (2018+) | Yes | Yes | No | CHAdeMO |
| Nissan Ariya | Yes (select) | Yes | No | CHAdeMO |
| Hyundai IONIQ 5 | V2G in development | V2H in development | Yes (standard) | CCS |
| Kia EV6 | No | No | Yes | CCS |
| Ford F-150 Lightning | No (UK) | Yes | Yes | CCS |
| Volkswagen ID. range (future) | Planned | Planned | No | CCS |
| Tesla (all models) | No | No | No | Type 2 / NACS |
V2G support is expanding rapidly. Check manufacturer specifications for the latest — this is a fast-moving area.
Is V2G Worth Waiting For?
For most buyers in 2026, V2G is not yet a reason to delay or change your charger or vehicle purchase. The ecosystem is still developing — compatible vehicles are limited (mainly CHAdeMO-based Nissan), V2G-compatible chargers are expensive, and the commercial frameworks are still maturing.
However, if you're buying a new vehicle and bidirectional charging is important to you, it's worth ensuring the vehicle's hardware supports it. CCS-based V2G is expected to become more common from 2026–2028 as the ISO 15118-20 standard becomes more widely implemented.
Regular bidirectional cycling does cause additional battery degradation compared to standard charging. Manufacturers offering V2G typically extend the battery warranty to cover V2G use — always check the warranty terms.
Frequently Asked Questions
Can I retrofit V2G to an existing EV charger?
No — V2G requires a bidirectional charger (both the vehicle hardware and the charge point must support it). Standard home charge points are one-directional. V2G-capable charge points are a separate product category, currently at a higher price point than standard home chargers.
Will V2G void my EV's battery warranty?
It depends on the manufacturer. Nissan, for example, explicitly warranties the Leaf battery for V2G use. Other manufacturers vary. Always check the warranty terms before participating in a V2G scheme.
How is V2G different from a home battery (like a Powerwall)?
Functionally similar — both store electricity for later use. The difference: a home battery is a fixed installation, while your EV battery is mobile. V2G is more complex to implement (requires bidirectional charger + compatible vehicle), but if you already have the EV, it uses storage capacity that would otherwise sit idle.