... station, fish vessel or areas which need the power supply.4.With intelligent display system,it can indicate ... ,overcharging, overdischargingSpecification of 20W solar power generator: Part NameItemTechnical DataSolar Power ParametersMax Output18V 20W Max Current1.1A ... 70%)CoverSize385 x 290 x 100 mm MaterialFireproof ABSFunctionCharger for household power generation system , fans, TV, computer, etc ...