Add to Cart Fortress Power Fortress Power eVault Max 18.5 18.5kWh 48V Lithium Iron Phospate Battery MSRP: Now: $9,999.00 Was: Fortress Power, eVault Max 18.5, 48V Nominal/360Ah, 18.5kWh, LiFePO4 (Lithium Iron Phosphate) Battery, 10 Yr Warranty, Max 20 units in Parallel, UL-1642, 1973, 9540, eVault Max 18.5... MSRP: Now: $9,999.00 Was: Add to Cart