... Battery, Solar Inverter( If output power need to be converted into AC power 220V or 110V , the Inverter is necessary.)The ... is to convert the solar power into electricity power,or transfer the electricity power into battery to save,or ... Ni-Cd battery or Lithium battery.4.Inverter: The direct output solar power is 12VDC, 24VDC,48VDC.In order ... How many sets do you need ? solar home inverter off grid