What Do You Need to Set Up V2H at Home?

Vehicle-to-home (V2H) lets your electric car power your house directly from the battery, rather than sending power to the grid. You need a compatible EV, a bidirectional V2H charger, a qualified electrician, and modifications to your home's electrical setup. Unlike V2G, you are not selling power: you are redirecting it within your own home. If your car supports V2L rather than full V2H, that is a simpler starting point; see our V2L discharge cables. V2H is still early in the UK, so verify specifics with your installer and manufacturer.

What makes a car V2H capable?

The car must support bidirectional DC power flow through its charging port. The Nissan Leaf via CHAdeMO is the most commonly cited UK example, and other models are beginning to support it as the CCS V2H standard matures. Support is model-specific and sometimes trim-specific, so verify with the manufacturer for your exact year and variant.

What does the V2H charger do, and how is it different from a wallbox?

A standard wallbox converts AC grid power into DC for the car, one direction only. A V2H charger adds an inverter that runs in reverse: DC from the car becomes AC for your home's circuits. This makes the hardware considerably more expensive. Some units include energy management features to decide when to draw from the car versus the grid. Brands active in this space in the UK include Indra; check current pricing directly with suppliers.

What electrical work does a V2H installation involve?

A V2H installation requires a transfer switch (or automatic transfer switch) that isolates your home from the grid when the car is supplying power. This is a safety requirement: without it, power from the car could flow back into the grid, creating risks for engineers on the lines. The work may also involve changes to your consumer unit or a sub-panel for the circuits you want the car to power. Find an electrician with specific experience in bidirectional charging, not just standard EV wallbox fitting.

Which parts of your home can V2H power?

Most V2H installations power essential loads: lights, sockets, kitchen appliances, and heating controls, not high-draw items like electric showers. How long the car can supply the home depends on battery size, charger output, and household consumption. The goal is resilience during off-peak periods or a power cut, not replacing the grid permanently. Your installer should help you map which circuits to connect.

Is V2H the same as using a generator during a power cut?

Functionally similar, yes, but the experience differs. V2H is quiet, produces no exhaust, and can switch automatically, whereas a generator needs manual starting and fuelling. Both require a transfer switch to prevent power feeding back into the grid, which is a genuine safety risk for engineers on the lines. Never connect any power source to your home circuits without proper isolation by a qualified electrician.

How does V2H interact with solar panels?

V2H and solar work well together: solar charges the car during the day; the car supplies the home in the evening. Coordinating both usually requires an energy management system that tracks solar generation, the car's state of charge, and home demand. Ask your installer whether the V2H unit integrates with your solar inverter before committing.

Frequently asked questions

How long can a car's battery power a typical home through V2H?

It depends on your battery size and your home's consumption. Running essential loads only uses far less energy than powering everything including electric heating and an oven. A larger battery will obviously last longer. Rather than quoting a specific figure, the honest answer is: ask your installer to model this based on your car's battery and your household's actual usage profile.

Does V2H require a grid connection at all?

Yes, in normal use. The grid supplies your home when the car is not powering it, and you use the grid to charge the car cheaply off-peak. The transfer switch isolates your home from the grid when V2H is active, but the grid connection itself remains. Fully off-grid setups exist but are a much bigger and more complex project.

Is there a government grant for V2H equipment in the UK?

Grant support for home EV infrastructure changes over time. Check gov.uk and the Office for Zero Emission Vehicles (OZEV) pages for current schemes, as the specifics of what is funded and at what level do change. Your installer should also be aware of any current incentives that apply to your situation.

Will V2H affect my home insurance?

Any significant change to your home's electrical installation is worth declaring to your home insurer. A V2H installation involves changes to your consumer unit and the addition of a transfer switch, which are material alterations. Contact your insurer before work begins to confirm the installation is covered under your policy and whether anything needs updating.

Can I set a minimum battery charge so the car is always ready to drive?

Yes. Most V2H systems let you set a minimum state of charge that the system will not draw below, ensuring the car retains enough charge for your driving needs. Set this at a level that covers your typical daily mileage plus a comfortable buffer. Check the specific settings available on the V2H unit you are installing.

Do I need planning permission to install a V2H charger?

Standard EV home chargers generally fall under permitted development in England and do not need planning permission, but a V2H installation is more involved than a standard charger and may include external equipment. Check with your local planning authority if you are unsure, particularly if you live in a listed building or a conservation area where permitted development rights may be restricted.

V2H is a more involved project than a standard wallbox, but for drivers with the right car and a qualified installer it opens up real options for energy resilience. Start by confirming your car's compatibility with the manufacturer, then get quotes from installers experienced in bidirectional charging. If your car supports V2L rather than full V2H, our V2L discharge cables offer a simpler way to use your battery. For more on home charging, explore our Guides section.