1、Use CPU processor superior speed performance. 2、The high precision A/D sampling to ensure the accuracy of sampling. 3、The efficient tandem PWM charging mode, extend battery life, improves the system performance. 4、The controller with over temperature, over discharge, overload, short circuit protection function. 5、Radiator heat dissipation is fanless designed and fanless design. Dust is difficult to enter, sealed well, with sufficient material, no suction, low power consumption, effectively avoiding noise. 6、The photovoltaic array and reverse battery protection function. 7、Standard RJ45 interface equipment that can be used for connecting the liquid crystal display unit or PC monitor software and communication peripherals, it is convenient for the user view the controller’s running data, modify the controller control parameters. 8、Use of RS-232 communication, the communication speed and communication protocol compatibility are very well. Item Type: Solar Charge Controller 12V/24V 10A,  12V/24V 20A,  12V/24V 30A 12V/24V auto，48V 15V/30V/60V 22V/44V/88V Rated charging current 10A 20A 30A 40A 50A 60A ≤0.7V ≤0.2V Static loss 0.2W communication RS232/RJ45 Interface USB output 0.5A/5V Over-temperature protection Below 75℃ full current，75℃-90℃ half current，     above 90℃ off charge Working environment parameters LCD display temperature -20℃-75℃ Working environment temperature -20℃-50℃ Storage temperature -30℃-70℃ Protection level IP30 Mechanical parameters Wire terminal（㎜²) 2.5 6 10 10 16 16 Size LxWxH（mm) 165 x 100 x 50mm / 6.5 x 3.9 x 2.0in 207.5 x 129 x 69.5mm / 8.2 x 5.1 x 2.7in Net weight（kg） 0.35 0.38 0.40 1.30 1.35 1.40 Battery parameters Battery type Colloid lead acid battery Sealed lead acid battery Lithium iron phosphate battery Manganate Lithium battery User definition 15.5 15.5 13.2 14.4 13-16 14.8 15.0 12.6 14.0 13-16 14.6 14.6 12.4 13.8 13-15 14.2 14.4 12.2 13.6 13-15 13.6 13.8 12.0 13.2 12-14 12.6 12.8 11.5 12.6 11-13 10.8 10.8 9.6 10.5 9-11 Equilibrium charge duration(min) —— 120 120 120 60-180 Enhance charge duration(min) 120 120 120 120 60-180 Maximum 10V Min 6V Default 8V Maximum 8V Min 2V Default 4V Battery temperature compensation parameters Temperature compensation parameters Maximum 0mV∕℃∕2V Min -8mV∕℃∕2V Default -4mV ∕ ℃ ∕2V （based on 25℃） 1 x Solar Charge Controller 1 x English Manual