Estimate how many hours or days your electric vehicle can power your home during a blackout. Enter your EV battery size, typical household load, and how much energy you want to keep reserved for driving.
Adjust the sliders to see how your EV battery performs as home backup.
A typical EV with a 60–100 kWh battery can power an average U.S. home at around 1–2 kW for roughly 30 to 80 hours, or about 1 to 3 days. Runtime depends on battery size, your household load, and how much energy you reserve for driving. Light loads such as a refrigerator, LED lights, and a Wi-Fi router can stretch that into several days.
Currently supported models include the Ford F-150 Lightning, Ford E-Transit, Hyundai Ioniq 5 (with V2L/V2H adapter), Kia EV6 and EV9 (V2L), Chevrolet Silverado EV, and the Nissan Leaf using CHAdeMO V2H systems in Japan. Tesla has announced Powerwall-integrated V2H for the Cybertruck and upcoming models. You need a compatible bidirectional charger and utility approval.
For EV owners, V2H is often a cost-effective backup because the large battery is already paid for. A typical home battery such as a Tesla Powerwall stores about 13.5 kWh and costs several thousand dollars installed, while most EVs store 4–8× that capacity. The main trade-offs are coordinating driving with outage timing and slightly higher battery cycle wear.