What is On grid system? Grid-connected solar photovoltaic power generation system is composed of photovoltaic cell array grid-connected inverters, which directly input electric energy into the public grid through the grid-connected inverters without passing the storage battery   Item NO. JH-5KW-ON System Type: Grid-tied Solar System Solar Panel Type: Monocrystalline Solar Panel Controller MPPT Inverter 5KW  Warranty 10 Years OEM Accepted