Lithium Batteries

Rack and wall-mount lithium iron phosphate (LiFePO4) packs for 48 V systems. Three numbers decide it: usable capacity in kWh, the continuous discharge current against what your inverter draws, and the charge temperature range. Some packs here have built-in heating, which is what lets one charge in an unheated building in winter. Check that the pack is on your inverter's supported list for closed-loop charging, and buy the matching rack, cables and hub from the same maker.