Features: LCD display provides information on battery working status, solar panel working status, mode control, load output status, and each parameter. 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 (for factory test use only). Automatic voltage identification for DC12V/24V, DC36V, and DC48V systems. Automatic focusing MPPT tracking charging ensures high charging efficiency with nonstop detection during charging. Equipped with time setting and parameter values setting functions. Charging control function is not restricted by mode, initiating charging whenever conditions are met. Discharge control varies based on different modes: Charging mode: No discharge under any condition. Light control mode: Discharge starts with a 10-minute delay after the controller detects night and stops with a 10-minute delay after detecting daytime. Light control + Time delay control mode: Discharge starts with a 10-minute delay after night detection, with a countdown timer; discharge stops when the timer reaches 0. Maximum delay time is 23:59. General control mode: Discharge maintained unless there is a fault. Manual control mode: Discharge controlled manually with a button. Timing control mode: Discharge scheduled at regular intervals. Test mode: Similar to light control + time delay control mode, but with a 10-minute shorter delay. Low-voltage protection feature allows manual discharge activation by long-pressing a button for 5 seconds, but may potentially harm the battery. Caution advised. Specifications: Name: Solar MPPT Controller Current: 80A Input Voltage: DC12V/24V, DC36V, DC48V Output Voltage: DC12V/24V, DC36V, DC48V, DC5V/1.5A*2USB Working Temperature: -25°C to 55°C Material: Plastic Color: Black Package Contents: 1 x Solar MPPT Controller Note: The package includes only the item listed above. Other products are not included. Due to light reflection and different displays, the color of the item in the picture may appear slightly different from the actual product. The allowed measurement error is +/- 1-3cm.