PV module: Turns light into electricity. A group of solar cells in a sealed unit.

Interactive inverter: Often called grid-tied inverter. An inverter that reads the voltage of the grid or microgrid and produces as much power and current as it can, regardless of loads. For instance, a 5kW inverter can only put out 5kW. Grid tied inverters are sold according to maximum output power. They also have dc and ac operating voltage ranges.