Features 1[SAFE OPERATION] Suitable for solar off grid systems automatic control of charging and discharging comprehensive self test and electronic protection functions to avoid installation errors and system failures. 2[LCD DISPLAY] Adopt LCD display and button man machine interface automatic identification of day and night user friendly design of the browsing interface to facilitate various operations. 3[MULTIPLE CONTROL] Complete on site control parameter setting and modification various load control methods and intelligent memory function enhance the flexibility of load output. 4[AUTO ADJUSTMENT] Using temperature compensation charging control algorithm the system automatically adjusts the charging and discharging parameters to improve the service life of the battery. 5[OPERATING VOLTAGE] High accuracy A/D sampling to ensure accuracy automatic identification of 12V 24V system voltage or 48V battery working voltage and efficient series PWM charging method. 6[CIRCUIT PROTECTION] The controller has over temperature over discharge overload short circuit automatic protection functions photovoltaic array and battery reverse connection automatic protection function. 7[5V DC OUTPUT] Can supply power to mobile phones or digital products and the standard RJ45 interface can be used to connect communication peripherals such as liquid crystal display units or PC monitoring software. Specification Item Type: Solar Charge ControllerProduct Material: Alloy SteelProduct Size: Approx. 207 x 134 x 70mm / 8.1 x 5.3 x 2.8inModel: JN-R 12V/24V 30ABalance Charge: 14.5V 29.0V 58.0VOverload Protection: 1.2 times 3s recovery 1.5 times 10s recovery more than 2 times need to be repaired manuallyMaximum Wire Diameter: Approx. 4mm / 0.16inStatic Loss: 0.3WCommunication: RJ45USB Output: 5V 0.5ALCD Temperature Range: -20-75Working Environment Temperature: -20-50Storage Temperature: -30-70Waterproof Grade: IP30 Package List 1 x Solar Charge Controller Note System maintenance to maintain optimum long term performance the following inspections are recommended twice a year.1. Verify that the controller is safely installed in a clean dry environment.2. Make sure the airflow around the controller is not obstructed and remove any dirt or debris from the heatsink.3. Check all exposed wires for insulation damage due to sun exposure friction with surrounding objects dry rot insect or rodent damage. Repair or replace leads if necessary.4. Tighten the screws on all electrical connection terminals as recommended.5. Check the grounding of all parts of the system and make sure that all grounding wires are grounded firmly and correctly.6. Inspect all terminals for signs of corrosion damaged insulation high temperature or burning discoloration and tighten the terminal screws to the recommended torsion.7. Check for dirt nesting insects and corrosion and clean as needed.8. If the arrester fails the faulty arrester should be replaced in time to prevent arrester strikes from damaging the controller or even other equipment of the user.