Description: Features: 100% brand new and high quality Complete voltage of the custom battery (adjusted by the key) 24 v (29 v) 36 v (41 v) 48 v (56 v) 60 v (70 v) 72 v (85 v). Press and hold the (-) button to change the current display and output voltage. Intuitive dual led digital display solar panel voltage, solar panel charging current, battery voltage, charging current. The improved mppt charging algorithm captures as much of the panel energy as possible, taking into account both brightness and low light. Intuitive LED display allows users to understand the state of operation of the solar energy and the battery. The controller takes power completely from the solar panel and does not consume battery power. With overload, reverse connection of solar battery input, battery reverse polarity protection (blown fuse). Specification: Input Voltage: 13-45V Output Voltage: 29-85V Input Current: Max 10A DC-DC Efficiency: 92%-97% MPPT Tracking Efficiency: 99.5% Working temperature: -20-+60 Material: Aluminum Alloy Color: As pictures shown. Size: approx. 134x70x45mm(5.27x2.76x1.77in) Quantity: 1 pc Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Solar Charger Controller(other accessories demo in the picture is not included.)