Safer Home Battery Lasts 27 Years Without Fire Risk

Imagine never worrying about your home battery catching fire while it powers your house for nearly three decades. That future just arrived in Europe, and it's heading to America next year.

California-based Unigrid has launched Na+Casa, the first residential energy storage system using sodium instead of lithium. The company has already installed the batteries in homes across Europe, marking a major shift in how we store energy at home.

The breakthrough comes from Unigrid's sodium chromium oxide technology, which eliminates the fire risk that has plagued traditional lithium-ion batteries. Unlike lithium systems that can overheat and ignite, sodium-ion batteries remain stable even under extreme conditions.

The numbers tell an impressive story. Each Na+Casa battery delivers 10,000 full charge cycles, equivalent to daily use for more than 27 years. That's roughly triple the lifespan of typical home batteries on the market today.

The system works in temperatures from negative 40 degrees Celsius to 60 degrees Celsius. Whether you're facing Arctic cold or desert heat, the battery keeps running when you need it most.

"As residential energy bills rise, especially during extreme weather events such as the record heatwave we are seeing around the world, homeowners need storage that is safe, reliable, and financially sound," said Unigrid CEO Darren Tan.

Each unit provides 9.25 kilowatt-hours of usable energy and mounts on a wall or rolls on optional wheels. The system works with most existing solar panel setups, making upgrades simple for homeowners already using solar power.

The Ripple Effect

The 27-year lifespan opens doors for families who couldn't afford batteries before. Unigrid plans to offer the system with zero money down and monthly payments, similar to leasing solar panels.

This approach means homeowners avoid the upfront cost while still enjoying backup power and lower energy bills. The company takes on the risk of the battery lasting decades, not the customer.

Unigrid joins several other companies bringing sodium-ion batteries to homes worldwide, including Eleven Energy and Biwatt. The technology is moving from laboratory promise to living room reality.

The batteries currently hold UN transport certification, with US safety certifications expected soon. Unigrid aims to launch in America by late 2026 and plans to produce enough batteries annually to power thousands of homes.

For homeowners watching energy bills climb during heat waves and cold snaps, safer and longer-lasting storage is finally within reach.