Solar Charge Controller MPPT Buck Charging 10‑30V Adjustable Control for Battery 400W Item Type: Solar Charge Controller Material: AluminumProduct Size: Approx. 120 x 80 x 40mm / 4.72 x 3.15 x 1.57in Efficiency: ≥95% Noise: <55dB Application: For solar street light controllers, solar chargers, solar electric tricycles, solar toy cars, household solar panels, solar monitoring and other usage scenarios. Weight: Approx. 482 g / 17 oz Applicable Batteries All kinds of batteries with charging voltage between 10-30V. Applicable PV Panel Parameters Open Circuit Voltage 18V-55V Maximum Power Voltage 17V-55V Charging Module PV Input Starting Voltage 18V-55V PV Input Tracking Voltage 17V-55V Output to Battery Voltage 10-30V, adjustable. Output to Battery Current Maximum. 25A Load Loss 0.35W Voltage Regulation 1% Load Regulation 1% Protection Module Battery Under Voltage Protection Yes Battery Terminal Short Circuit Protection Yes Battery Anti Reverse Protection No Over Current Protection Yes Temperature Protection Yes Protection Class IP66 Working Temperature -40℃~+65℃ 1. Overheating Protection: When the internal temperature of the MPPT controller exceeds 100 °C, the MPPT controller will reduce the output power. If the internal temperature continues to rise to 110℃, the MPPT controller will automatically turn off the output. When the internal temperature of the MPPT controller is lower than 85℃, the MPPT controller will automatically resume operation. 2. Short Circuit Protection: When an unexpected short circuit occurs in the MPPT controller output, the MPPT controller automatically turns off the output and automatically returns to normal after the short circuit removed. 3. Input Under Voltage Protection: When the input voltage of MPPT controller higher than 17V, it starts working. When the input voltage is lower than 1.1 times of the rated output voltage and the charging current is lower than the cut off current, the system will turn off the charging and turn off the display. When the input voltage of the MPPT controller is lower than 10V, the MPPT will protectively shut down and automatically resumes operation after the input voltage is normal.