How to Use: 1. Connect the positive and negative poles of the battery to the controller as shown in the figure, and the controller will automatically detect the battery voltage. 2. Connect the positive and negative poles of the load to the controller as shown in the figure, be careful not to reverse. 3. Connect the solar panel to the controller as shown in the figure. Specification: Item Type: Solar Panel Controller Material: ABS Model: WBL1210 Uses: Suitable for home, industry, commerce, etc. Rated Voltage: 12/24V Maximum Photovoltaic Voltage: 50V 10A Maximum Photovoltaic Output Power: 130W (12V) 260W (24V) 20A Maximum Photovoltaic Output Power: 260W (12V) 520W (24V) 30A Maximum Photovoltaic Output Power: 390W (12V) 780W (24V) USB Output: 2 USB outputs, 5V/2.5A (maximum) Standby Current: <10mA Working Temperature: -35-60℃ Package List: 1 x Solar Panel Controller 1 x User Manual