Features: 1. Made of high quality material, durable and long service life. 2. This is a compatibel MPPT controller PWM intelligent/efficient/energy saving, it has efficient MPPT controller charging function to automotically track the maximum power point,10%-30% higher than the ordinary controller charging efficiency 3. The LCD screen display can provide clear reading. 4. The controller has battery undervoltage protecting function. 5. This controller has standby energy saving,more than 30% energy than ordinary controller,the standby power consumption of only 10mA-15mA Specification: Condition: 100% Brand New Model: MPPT L-80 Maximum Power Current: 80A Installation (mm2): 20mm2 Installation Line (AWG): 2# (AWG) Peaking Power of Solar Panels (Max Wp): 1000W Battery Capacity Configuration: 800Ah Battery Floating Voltage: 13.8V (12V System) / 27.6V (24V System) Battery (Undervoltage) Protecting: 10.6V (12V System) / 21.2V (24V System) Battery (Undervoltage) Recovery Voltage: 12.6V (12V System) / 25.2V (24V System) System Load Loss: <= 13mA: Loop Buck; <=100mV Working Temperature: -10℃ ~ 60℃ Storage Temperature: -30℃ ~ -70℃ Working Temperature: <= 90%, No Condensation Temperature Compensation: -4mv / Cell /℃ The Maximum Open Circuit Voltage of Solar Panels: 18V~24V (12V System) 36V~48V (24V System) Solar Panel Maximum Open Circuit Voltage: <=48V Size: Approx. 188 * 128 * 61mm / 7.4 * 5 * 2.4in Weight: Approx. 731g / 25.8oz Package List: 1 * Controller 1 * Temperature Probe 1 * English User Manual