Photovoltaic power generation system mainly consists of PV modules, a controller, an inverter, a battery, and other accessories (grid-connected does not need a battery).
Depending on whether it depends on the public grid, there are two types of PV systems: off-grid and grid-connected, of which off-grid systems operate independently and do not depend on the grid. Off-grid PV systems are equipped with storage batteries to ensure the stability of the system power and to supply the load with electricity when the PV system does not generate electricity at night or when the electricity generation is insufficient on rainy days.
Composition and Working Principle of The Photovoltaic Power Generation System
