Portable 20W Solar Flexible Panel Kit 12/24V Switch USB Charging Interface Solar Board With 300W Controller Waterproof Solar Cells for Phone RV Car Warm notice: 1. The solar controller is universal for 12 and 24, but currently the supporting solar panel is used for 12 volts, so this complete set is designed for 12 volts. 2. Controller MAX output power is 300W ,solar panel power about 20W ONLY!! Features: Made of high-quality materials, environmentally friendly, durable and delicate. It has a high conversion rate. Dual-output solar panels with USB interface to meet any of your requirements. Environmental protection and pollution-free, realizing the conversion of solar energy to electric energy It has a wide range of applications and can be used in many places, such as automobiles and small household appliances. A solar panel is a device that directly or indirectly converts solar radiation into electrical energy by absorbing sunlight. Compared with ordinary batteries and rechargeable batteries, solar panels are more energy-efficient and more environmentally friendly. Specifiations: Name: Flexible Solar Panel Type:Standard Kit/Standard Kit+Controller (optional) Controller current selection: 10A, 20A, 30A, 40A, 50A, 60A (optional) Material: Polysilicon Controller power: 300W USB output: 5V Number of USB ports: 2 Size: 43 * 20cm  Color: as show Packing list: 1*Standard Kit+Controller