Which type of ground fault do inverters primarily detect?

Inverters primarily detect DC ground faults. This is because photovoltaic (PV) systems generate direct current (DC) electricity, and their output needs to be converted to alternating current (AC) for use in homes and businesses. DC ground faults can occur when there is an unintended connection between the DC circuit and ground, which can pose safety hazards and potentially damage equipment.

To mitigate these risks, inverters are equipped with ground fault detection mechanisms specifically designed for the DC side of the system. By identifying these faults, inverters can disconnect the system from the grid or alert users, thereby preventing electrical hazards, such as fires or equipment failure.

While safety measures are in place for AC systems as well, it is the DC ground fault detection that is most critical for the inverter's operation since it directly relates to the functionality of the solar panels and their electrical output. Therefore, understanding DC ground fault detection is essential for proper installation and maintenance of solar PV systems.