... overload,overcharging, overdischargingSpecification of 20W solar power system: Part NameItemTechnical DataSolar Power ParametersMax Output18V 20W ... Battery managementStorage battery charging and discharging management system load outputInverter150W with UPS function12V L 220V ... ABSFunctionCharger for household power generation system , fans, TV, computer, etc. 2012 New Design Solar Power System for Home ...