This solar controller combines MPPT and PWM charging technologies,It delivers a high charging efficiency and excellent value for money.While it may not provide 100% true MPPT functionality, it still delivers reliable performance.tracking efficiency not less than 99.5%. 12V/24V/36V/48V automatic recognition; dual USB 5V charging ports Multi-function LCD with backlight display and clock display, 7 operating modes: charging mode, light control mode, light control + time delay control mode, universal control mode, manual control mode, timing control mode MPPT solar controller with voltage protection, discharge current protection, charge protection, over temperature protection Compatible with Seal, GEL, Flooded, LifePO4 battery charging Y&H products come with a warranty, please feel free to contact our team for technical support and our engineers can help you find advice and solutions to any problems you may have.