Do I need solar if I want home backup from an EV?

You don’t need solar to use your EV as a backup power source. On its own, an EV battery can keep your home running during an outage, offering protection without requiring additional equipment. 

The average EV battery stores around 65 kWh of energy, more than four times the capacity of a typical home battery. In practical terms, that can power a home for several days, not just a few hours, depending on how energy is used. 

Using your EV for backup turns something you already own into an energy asset. It’s a simple way to make your home more self-reliant without adding new technologies. 

However, relying on an EV alone means depending on a single energy source, which limits overall resilience. This is why it helps to think of your EV as the starting point of a private grid – a setup where energy sources such as your EV, solar, home battery, and the public grid are coordinated within one energy ecosystem. In this setup, your home can produce, store, and use its own energy rather than relying entirely on external supply. 

Owning an EV already gives you the foundation to build this kind of system, with the flexibility to expand over time. 

Expanding beyond EV-only backup 

If you choose to expand your private grid, generating your own energy is the natural next step, and solar panels allow you to do that every day. During an outage, your home can run directly on solar during daylight hours, while also giving you the flexibility to charge your EV using that same energy in case you plan to use it later in the day.