2000Watt portable energy system,open the upper cap,we can see main switch.the main function, Cigar lighter output,12V 10A ,four QC 3.0 USB connector and two type C connector, three are three AC output connactors. If we do not need th USB out,we can close the USB switch. input connector, 100V-240V electric supply can charge it,charger inside And this is PV input. OK,we can know the manin function.