Feature 1 The sealing type large radiator is used for the the product, and the aluminum profile mold with the radiator and the outer casing, which has the effect of dissipating heat and avoiding the dust entering, and the product of the large level improves the service life of the product. 2 The controller adopts LED status indicator light to facilitate the user to directly work on the current controller. 3 The digital tube displays the charging current, the battery voltage, and the solar input voltage in real time, and the operating status is clear at a glance. 4 Efficient charging technology ensures that the sun plates work in the best condition, maximize the charge, and effectively extend the battery life. 5 When the battery is reversed, the fuse will blow and the user will replace the 10A, 520 glass tube fuse.Item Type:Solar Panel ControllerPhotovoltaic Panel Open Circuit Voltage: 16V~50VMPPT Voltage Range: 16V~45VMPPT Efficiency: 99%Machine Efficiency: 295%No-Load Loss: <5mASolar Input Power: 18V200W, 36V400WCommunication Distance: 5mBattery: 48V or 60V or 72V (One-Button Setting)Overvoltage Protection: 58V at 48V, 72V at 60V, 87V at 72VOperating Temperature: -25~+65 Package List1 x ControllerNote