... is safe,simple,convenient and high efficient.INPUT SOLAR, 18VA C , 220VOUTPUTAC,220VDC,12VUSB,5.0VSPECIFICATION ITEMMRD-SPC-300A2MRD-SPC-500A2MRD-SPC ... SwitchoverAutomaticAutomaticChargeable by Electricity off grid solar inverter with UPS function (the battery not only can charge by solar panel ,but also by main electricy ...