This solar panel charge controller uses an LCD display to show all parameters and status in a compact, energy efficient package. It includes an automatic regulation function, a built in load switch, and has USB and DC outputs for versatile off grid charging. - LCD display: clear, parameter rich readouts with a built in energy saving backlight. It helps you quickly assess operating status. Please connect positive and negative terminals correctly and ensure all connections are tight. - Fully automatic with load control: intelligent regulation with an output switch for easy operation. Connect the controller to the battery with the correct polarity. The battery indicator light will illuminate when the connection is successful; if not, check and reconnect. - Power efficient charging: microcontroller based accuracy. While charging, the arrow between the panel icon and the battery icon flashes rapidly; when the battery is full, the flash slows and charging stops. The controller protects against voltage overshoot and discharge. Suitable for DC lamp and phone charging. One key control to open and close the load. - Electrical specs: Rated discharge current 20A. USB output 5V, 1.5A. DC output 12V-24V, 20A. Connect your load to the load output port with correct polarity. Pay special attention to plus and minus to avoid reversed connections, which could damage the load. 2-3 use scenarios: - Power a USB phone charger and small LED lights in off-grid cabins, garden areas, or remote sheds. - Run 12-24V DC loads such as small pumps or lights in RVs, boats, or remote sensor stations. - Use as a simple controller for solar panels to protect battery banks and manage basic DC lighting.