Your EV's battery is big enough to run your house — here's what stops most people

Getting the energy into the house can be complicated and expensive.

By Thomas Godwin Nov. 7, 2026 4:15 pm EST Phonlamaiphoto/Getty Images Add Engadget on Google: Google Discover

Most EV batteries have significantly more capacity than a standard home battery, so it makes sense to consider running the house with your car. But there are caveats. You have to consider the EV's battery capacity, power output and vehicle-to-home (V2H) compatibility. Battery capacity is measured in kilowatt-hours and helps determine how long you can keep things running. Power output is measured in kilowatts and determines which appliances you can run at the same time. The V2H system also needs to handle the brief startup surge when appliances such as air-conditioners and refrigerators kick on. The numbers are important, especially for startup surge.