Feature: 1. MCU Control: Adopting MCU control, it has the advantages of intelligence, strong adaptability and reliable function. 2. MPPT Technology: Using MPPT maximum power point tracking technology, it can work at the best power point of the I‑V curve, and the efficiency is up to 99%. 3. 12V 24V Automatic Adaptation: Adopt high accuracy temperature detection and compensation circuit, automatic identification of 12V 24V system voltage, three stage battery power display. 4. Multiple Protections: With multiple protections: overcharge, overdischarge, overcurrent, short circuit, anti reverse connection protection. 5. 5V USB Output: With exquisite structure design and precise circuit design, 5V output with USB connector can meet the charging needs of digital products. Specification: .Item Type: Solar Charge Controller Material:ABS Product Size: Approx. 13.2 x 10 x 2.8cm / 5.2 x 3.9 x 1.1in Scope of Application:Industrial Water, Agricultural Irrigation, Photovoltaic Power Generation, Desert Control 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℃ Weight: Approx. 295g / 10.4oz Package List: 1 x Solar Charge Controller1 x User Manual