Inverters play a critical role in any off grid solar system. An inverter is a device that transforms the direct current (DC) electricity produced by yourphotovoltaic (PV) solar panelsandstored in yourbatteries into alternating current (AC) electricity, which can then be used to power individual appliances and lights. Without an inverter, the DC electricity produced by the solar panels is not suitable for use in many of your common household appliances.