Modular LiFePO4 energy storage from your trusted high performance battery partner – the Freedom Won eTower modular stackable battery is designed for smaller 52V solar integrated and backup applications (general UPS, residential, telecoms, server rooms etc). The e5000 modules are stacked in a neat and convenient tower with the help of a plastic frame placed below each module, with options of 1, 2, 3, 4, 5 and 6 modules per system.