Feature: 1. Intelligent and Convenient: The solar charge controller is MCU control, which has the advantages of intelligence, strong adaptability, and reliable functions 2. MPPT Technology: The solar panel charge controller applies MPPT maximum power point tracking technology, which can work at the best power point of the I V curve, and the efficiency is up to 99% 3. Long Lasting Battery: The 12v solar charge controller adopts high accuracy temperature detection and compensation circuit, and the battery life is longer 4. 12V 24V: The solar charge controller has automatic identification of 12V 24V system voltage and three stage battery power display. with exquisite structural design and circuit design 5. USB 5V Output: The MPPT solar charge controller has overcharge, overdischarge, overcurrent, short circuit, anti reverse connection protection. The 5V output with USB connector meets the charging needs of digital products Specification: Item Type: Solar Charge Controller Material:ABS Product Size: Approx. 13.2 x 10 x 3.2cm / 5.2 x 3.9 x 1.3in Indicator Light: Solar: Charging Status Indicator, Steady Light Means Charging, Flashing Means Entering Floating Charging State. Load: Discharge Status Indicator, when the Load Indicator is On, It Means That the Battery is Allowed to Output, but It Does Not Mean Whether There is Actual Output Current. Battery: Battery Level Indicator Rated Charging Current: 20A System Voltage: 12V 24V Automatic Adaptation MPPT Tracking Efficiency: Maximum 99% Overload and Short Circuit Protection: ≥1.5 Times Rated Current No Load Loss: <10mA Overvoltage Protection: 16V; x2/24V Charge Cut off Voltage: 14.7V; x2/24V Discharge Recovery Voltage: 12.0V; x2/24V Discharge Cut off Voltage: 10.8V; x2/24V USB Output: 5V 1A Working Temperature: -35℃ to+55℃ Scope of Application:Industrial Water, Agricultural Irrigation, Photovoltaic Power Generation, Desert Control Weight: Approx. 375g/13.2oz. Package List: 1 x Solar Charge Controller1 x User Manual