Shop Fortress Power Batteries – America's Premier LiFePO4 Solar Storage ▾

Fortress Power is America's leading manufacturer of lithium iron phosphate (LiFePO4) solar storage systems, delivering safe, scalable battery solutions that have been proven in thousands of residential and commercial solar-plus-storage installations nationwide. At US Solar Supplier, we carry Fortress Power's eVault Max and Envy battery series, trusted by professional solar installers for their reliability, compatibility, and outstanding performance.

Fortress Power batteries are engineered to deliver over 6,000 charge cycles, wide temperature operation from -4°F to 140°F, and comprehensive BMS protection against overcharge, over-discharge, and thermal events. Compatible with Sol-Ark, SMA, Schneider Electric, Victron, and other leading hybrid inverter brands. Shop Fortress Power at US Solar Supplier for competitive wholesale pricing, expert installation support, and fast nationwide delivery.