The power grid and almost every equipment that uses electricity uses alternating current (AC) while solar modules - either individually or when connected together - generate Direct Current (DC). Therefore it is extremely important to switch the DC power being generated from solar power with an inverter into useable AC power. Thus a solar inverter actually “inverts” DC to AC to operate all types of common electrical loads from lights and fans to air-conditioners and heavy machinery without interruption.
2 common types of solar energy inverters are On-Grid Solar Inverters also known as Grid-Tie Solar Inverters and Off-Grid Solar Inverters. Both serve a different function and are used for a different type of solar energy system, although each inverter still converts DC into AC.