Features 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 Specifications 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 MPPT Tracking Efficiency: Maximum 99% Overload and Short Circuit Protection: ≥1.5 Times Rated Current No Load Loss: <10mA Overvoltage Protection: 16V; 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 Controller 1 x User Manual