Rated discharge current: 20A; USB output voltage: 5V/3A; Battery voltage: 12V / 24V auto. Adjustable power rate with two USB ports; 3-stage charge management (Bulk, ABS, Float) and 4-stage PWM chargeFeature: Equipped with an industrial-grade STM 8 microprocessor to control the charger and the discharging process and it has a reliable battery for managing the charging and discharging periodMultiple electrical protection: protection overcurrent and short circuit protection, reverse connection protection, low voltage and overload protectionGood heat dissipation: double mosfet reverse current protection, low heat generation (ALL components electronics generate heat when working, it is best to shelter them for better heat dissipation, avoid direct sunlight or humid place)Easy to use: comes with a screen that can show status and data clearly, it can be switched modes and parameter configuration, suitable for home, industry, commerce, etc.Contents: 1 solar charge controller, 1 user manuallucky meet