Flexible & Widely Used : Compared to lead-acid batteries, LiFePO4 lithium batteries provide a greater energy density, and support parallel and series Connections for 12V, 24V, and 48V electric systems. Easy to expand system capacity (1.28kWh to 20.48kWh) according to your needs. Allow to be extended up to 4 in series and 4 in parallel (Max 4S4P).