Low voltage storage batteries for residential systems, typically 48V or 51.2V nominal: Felicity LiFePO4 modules of 5.12 kWh for wall, rack or stacked mounting, floor units of 11.7, 14.3 and 16 kWh including heated IP65 versions, plus rack modules from Pylontech, Pytes, Dyness and Weco.
Low voltage is the standard choice up to around 20-30 kWh: it costs less, is safer to maintain and has the widest compatibility list among hybrid inverters. The limit is current: beyond certain powers cable sizes and losses become significant, and high voltage starts to pay.
Always check usable capacity in kWh, maximum charge and discharge current and CAN or RS485 compatibility with the inverter.
