The Renogy Rover Series Charge Controller is suitable for various off-grid solar applications. It protects the battery from becoming over-charged by the solar modules and over-discharged by the loads. The Rover’s charging process has been optimized to extend battery life and improve system performance. It includes a 4-stage battery charging algorithm for rapid, efficient, and safe charging. The Rover is the perfect addition to just about any solar power system, as it allows the system to function without wasted energy! If you have any questions regarding this product, please call us at 1 (800) 330-8678 or email sales@renogy.com.