Solar MPPT Controller Features: LCD display showing battery and solar panel working status, mode control, load output status, and parameter display. Normal and fault status indication. 7 operation modes: Charging mode, Light control mode, Light control + Time delay control mode, General control mode, Manual control mode, Timing control mode, and Test mode (factory test use only). Automatic identification of four voltages: DC12V/24V, DC36V, DC48V. Automatic focusing MPPT tracking charging for high efficiency. Nonstop detection during charging with bidirectional focusing tracking. Time setting and parameter values setting functions. Charging control function is immediately activated upon meeting charging conditions. Discharge control function varies by mode and conditions. Discharge Control in Different Modes: Charging mode: No discharge under any condition. Light control mode: Discharge after 10-minute delay at night, stops after 10-minute delay during daytime. Light control + Time delay control mode: 10-minute delay to start discharge at night, stops when timer reaches 0 (max delay 23:59). General control mode: Maintains discharge state if no fault. Manual control mode: Toggle discharge on/off using specific buttons. Timing control mode: Scheduled discharge on/off intervals. Test mode: Similar to Light control + Time delay control mode, with a reduced 10-minute delay. Low-Voltage Protection: In low-voltage situations, long press a specific button for 5 seconds to manually allow discharge. Use with caution as it may harm the battery. Specifications: Name: Solar MPPT Controller Current: 80A Input Voltage: DC12V/24V, DC36V, DC48V Output Voltage: DC12V/24V, DC36V, DC48V, DC5V/1.5A*2 USB Working Temperature: -25 to 55°C Material: Plastic Colour: Black Package Contents: 1 x Solar MPPT Controller Note: The color of the item may slightly vary due to light reflection and different displays. Measurement allowed error is +/- 1-3cm. Only the items listed above are included in the package. Other products are not included.