simple, with battery, customized Specification:1).solar panel : 100W Working voltage :12V-120AH2)converter:in put DC 12v/24v,out put 110v/220v3.)charging controller :output will stop if the voltage of batteries is too high or lowAppliance :1).it can provides power for lighting and entertainment in remote area, such as lights,fans,laptop ,TV and so on .2).it can also be used in emergency ,such as ...