Vehicle-to-Home (V2H) Charging: Use Your EV as a Home Battery
Can your electric car power your house? A beginner's guide to V2H technology, which EVs support it, what it costs, and whether it replaces a home battery.
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Your electric vehicle contains a battery pack that's 3–10 times larger than a typical home battery. A Ford F-150 Lightning has a 131 kWh battery. A standard home battery has 10–15 kWh. The maths is obvious: if you could use your EV battery to power your home, you'd have more backup capacity than you'd ever need.
Vehicle-to-Home (V2H) technology makes this possible. It's real, it's available today on some vehicles, and it's going to become mainstream in the next 3–5 years. This guide explains how it works, what you need, and whether it changes the case for buying a separate home battery.
What Is Vehicle-to-Home (V2H)?
V2H is a technology that allows an electric vehicle to discharge its battery to power a home. Instead of electricity flowing only from the charger into the car, it can flow in both directions — from the car into your home.
This bidirectional flow requires:
- An EV with a bidirectional battery management system
- A bidirectional charger (also called a V2H charger or bidirectional EVSE)
- A home energy management system to coordinate the flow
When the grid goes down (or during expensive peak hours), the system draws power from the EV battery to power your home. When cheap electricity is available (overnight, or from solar panels), the system charges the EV battery.