Your EV Can Power Your Home for Days During Outages

Imagine the power goes out in your neighborhood, but instead of fumbling for flashlights, you simply plug your car into your garage wall and keep everything running. For Roberta Howell and her neighbors in Menifee, California, that's not science fiction anymore.

The 70-year-old is one of six homeowners testing vehicle-to-home charging technology that lets electric cars power entire houses. Through a partnership between UC Irvine, KB Home, Kia, and charging tech company Wallbox, she's living in what might be the home of the future.

Here's what makes this so practical: a fully charged electric vehicle battery can power a typical home for several days, compared to just two to five hours from a standard home battery. The EV battery holds about eight times more energy than those expensive wall-mounted home batteries many people buy.

Howell drives a free Kia EV9 SUV as part of the research program. In exchange, she shares data with UC Irvine's Advanced Power and Energy Program so researchers can understand how real families use this technology in everyday life.

The system works through a smartphone app that lets homeowners decide when to draw power from their car. Howell programs hers to power her home from 7 to 10 p.m. each evening, which happens to be when her utility company charges the highest rates for electricity.

Professor Scott Samuelsen, who leads the research, says homeowners can save up to $600 yearly on electric bills by using their car's battery during expensive peak hours. That's real money back in people's pockets just for plugging in.

The technology relies on newly developed bidirectional chargers that let electricity flow both ways: from the grid to charge the car, and from the car to power the home. It's a simple concept that required years of engineering to make safe and reliable.

California utilities are supporting the program even though it means less revenue during peak hours. They're betting on innovations that strengthen the electric grid and prepare them for future certification requirements from state regulators.

Why This Inspires

This isn't just about convenience during blackouts. As California utilities increasingly shut down power lines to prevent wildfires, families could face extended outages lasting days or even weeks. Having a mobile power source sitting in the garage transforms how people think about energy independence.

The Shadow Mountain community where Howell lives was designed from the ground up as a sustainable energy testing ground, with over 200 homes featuring solar panels and all-electric appliances. Real families are proving these technologies work in actual daily life, not just in labs.

What started as a learning curve for Howell has become second nature. The technology that seemed complicated at first now runs automatically every evening, quietly saving her money while helping researchers perfect a system that could transform how millions of Americans power their homes.

Soon, the car in your driveway might be the most valuable appliance you own.