The off-grid DC solar power system(SDC Series) consists of solar panels, controller, battery Description:This ... , waterproof and easy to carry. Suitable for outdoor travel, camping, cell phone, digital products charging, to charge the battery, etc.2 ... (Im): 3.3A8. Open Circuit Voltage (Voc): 21.609. Solar cell: monocrystalline Remark: the above data under standard testing conditions(STC ...