All-aluminum Housing: Using aluminum heat sink, with nice heat dissipation effect, to ensure reliable and efficient operation under various working environments. LCD Display: Adopts LCD display, you can see the input volta, output volta, output current and temperature clearly at a glance. MPPT Technology: Maximum power point tracking technology, MPPT tracking efficiency up to 99%, compared to the PWM algorithm, the efficiency increased by 15%-20%. Protecting Mechanism: With protections mechanism for under volta, over temperature, short circuit, output over current, over load, backflow preventions, etc. When the internal ambient temperature of MPPT controller exceeds 65 or the charging current is greater than 30A, MPPT controller will automatically turn on the fan.