Are battery energy storage systems safe?

Whether attached to solar power systems or used as a backup generator, battery energy storage systems (BESS) are growing in popularity for homeowners in numerous states. These units may provide safer, cleaner backup power during outages. Like lithium-ion batteries generally, residential BESS may catch fire or even explode.

Are lithium batteries safe?

The January fire at one of the world's largest battery storage plants, the Vistra Energy lithium battery plant in northern California, highlighted safety concerns. Lithium burns at very high heat, and a fire can release a range of heavy metals and other chemicals of concern.

What types of batteries are safe to use with a solar system?

Lithium ion, salt water, and lead acid batteries are the main types of solar battery systems available, and are all safe to pair with a home solar system.

Which battery is best for solar energy storage?

They store more energy in a smaller space, making them popular for residential use. Lead-acid batteries are the traditional choice for solar energy storage. They are reliable and cost-effective but tend to have a shorter lifespan and lower energy density than lithium-ion batteries.

Are large-scale battery energy storage systems safe?

A report released Friday by a clean-energy trade group spells out best practices for safe use of large-scale battery energy storage systems following a major fire at a battery facility early this year.

Are lithium battery fires a safety concern?

While BESS technology is designed to bolster grid reliability, lithium battery fires at some installations have raised legitimate safety concerns in many communities. BESS incidents can present unique challenges for host communities and first responders: