300W Complete Solar Panel Kit 12V USB with 10-60A Controller Solar Battery for Car Yacht RV Boat Mobile Phone Battery Charger Controller Connection Steps (see the picture above) 1. Connect the positive and negative pole of the battery as shown, The controller will automatically detect the battery voltage; 2. Connect the solar panel to the controller; 3. Connect the load as shown, do not respond inversely; Note: Please strictly follow the illustrated wiring, Otherwise, it may cause the controller to short circuit; The disassembly order is opposite to the connection order. Features: 1. Made of high-quality materials, environmentally friendly, durable, and exquisite. Its conversion rate is high. 2. Dual-output solar panel with USB interface to meet all your needs. 3. Environmental protection and no pollution, realize the conversion of solar energy into electrical energy. 4. Wide range of applications, can be used in many places such as cars, small household appliances, and so on. 5. A