1、MPPT CHARGING CONTROLLER: Innovative MPPT technology, with tracking efficiency of up to 99% and peak conversion efficiency of up to 98%. 2、ALL BATTERY TYPES SUPPORT: The solar charging controller can support various batteries, including acid batteries, lithium iron phosphate batteries, and ternary lithium batteries. The default setting is acid battery. 3、PROGRAMMABLE LCD DISPLAY: Solar controller matched with 12V, 24V, 36V, 48V automatic identification batteries. The main parameters can be programmed through the LCD screen. The clear backlit LCD display makes your operation clearer. 4、FAST HEAT DISSIPATION: The solar panel charging controller made of pure aluminum alloy shell has good heat dissipation. Especially the multi edged design increases the heat dissipation area. Maintain the optimal heat dissipation state of the solar MPPT inverter during long term operation. 5、COMPLETE PROTECTION: Built in overcharging and discharging protection, short circuit and open circuit reverse connection protection, overcurrent protection, and overheating temperature protection. Therefore, MPPT controllers can be widely used in RVs, trailers, ships, campsites, and homes. 1 x Solar Charge Controller 4 x Screw 4 x Expansion Tube  Item Type: MPPT Solar Charge ControllerMaterial: Aluminum Alloy No Load Loss: Less than or equal to 0.4WConversion Efficiency: Less than or equal to 98%MPPT Tracking Efficiency: Greater than 99%Temperature Compensation Coefficient: -2mv, ℃, 2V (default value)Working Temperature: -10 ℃ to 65 ℃Protection Level: IP21Battery Compatibility: In accordance with for EN61000, for EN55022, for EN55024Communication Method: Rs485(without)Altitude: Less than or equal to Approx. 3000m / 9842.5ft