Solar PV Power Generation: There are 2 kinds of solar PV power generation systems: 1) Grid-connected power generation system: it converts solar energy into the electricity, then send the electricity to the utility grid through grid-connected inverter; Or use the electricity to power alternating current loads directly through grid-connected inverter. It can work without storage battery.Grid-connected power generation system is the trend of solar energy development. 2) Stand-alone power generation system: it converts solar energy into the electricity, use the electricity to charge the storage battery through controller; Then it send DC electricity from storage battery to inverter through controller, after that, AC electricity comes out to power alternating current loads. This is suitable for particularly remote areas or areas where power lines are not available.