Function: 1. Made of high quality material, durable and long life. 2. 3. LCD display can provide clear reading. 4. The controller has the function of undervoltage protection of the battery. 5. This ma standby power saving, more than 30% power than regular controller, standby power consumption only 10mA-15mA Specification: Characteristics: 1. Made of high quality material, durable and long life. 2. 3. The LCD screen can provide clear reading. 4. The ma function of protection against too low battery voltage. 5. This ma standby power saving, more than 30% power than ordinary controller, standby power consumption only 10mA-15mA Specification: Model: MPPT L-80 Maximum power current: 80A Installation (mm2): 20mm2 Linia (AWG): 2# (AWG) Peak power of solar panels (max. Wp): 1000 W Battery Capacity Configuration: 800 Ah Battery Maintenance Voltage: 13,8V (12V system) / 27,6V (24V system) Battery protection (undervoltage): 10,6 V (12 V system) / 21,2 V (24 V system) Battery (undervoltage) Recovery voltage: 12,6 V (12 V system) / 25,2 V (24 V system) Loss of system load: Operating temperature: -10 ℃ ~ 60 ℃ Storage temperature: -30 ℃ ~ -70 ℃ Operating temperature: Temperature compensation: -4mv/cell/℃ Maximum open circuit voltage of solar panels: 18V~24V (12V system) 36V~48V (24V system) Maximum open circuit voltage of solar panel: Size: approx. 188*128*61mm/7.4*5*2.4in Weight: approx. 731 g / 25,8 oz Package List: 1 * controller 1 * temperature probe 1 * English User Manual