Big Battery

BigBattery – High-Capacity Lithium Storage for Home, Solar, and Mobile Power

Get long-lasting, plug-and-play energy storage with BigBattery LiFePO₄ battery packs, engineered for off-grid living, solar backup, RVs, and mobile applications. Built in the USA, BigBattery systems are known for high-capacity output, fast charging, and unmatched value per kilowatt-hour — with no maintenance and over 4,000 charge cycles.

With a variety of voltage and size options, BigBattery makes it easy to scale your energy system for your lifestyle, whether you're powering a cabin, van, or entire home.

Browse our BigBattery collection and choose rugged, expandable lithium storage built for serious energy independence.