Features The controller adopts LED status indicator light to facilitate the user to directly work on the current controller. 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. Efficient charging technology ensures that the sun plates work in the best condition, maximize the charge, and effectively extend the battery life. 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. When the battery is reversed, the fuse will blow and the user will replace the 10A, 5×20 glass tube fuse. Specification:Item Type:Solar Panel Controller Photovoltaic Panel Open Circuit Voltage: 16V~50V MPPT Voltage Range: 16V~45V MPPT Efficiency: ≥99% Machine Efficiency: 295% No-Load Loss: <5mA Solar Input Power: 18V200W, 36V400W Communication Distance: ≥5m Battery: 48V or 60V or 72V (One-Button Setting) Overvoltage Protection: 58V at 48V, 72V at 60V, 87V at 72V Operating Temperature: -25℃~+65℃ Package List:1 x Controller Note: Package List 1 x Controller