Xplorer 20a PWM Solar Charge Controller Suitable for solar systems up to 250w  50V max input 1. Automatic Voltage Identification: 12V/24V system voltage is automatically identified, and the 3 stage PWM charging algorithm is used to perform periodic or over discharge equalization charging on the battery, effectively preventing battery imbalance and vulcanization, and extending battery life. 2. Temperature Compensation: The Solar controller adopts temperature compensation, the charging parameters can be automatically adjusted, and a variety of load working modes are used to facilitate the product to be suitable for different types of loads. The product provides overcharge, overdischarge, overload protection, and short circuit protection. 3. Load Start Up Method: The Solar controller adopts an advanced load start up method, and large capacity loads can also be started smoothly. The controller can connect two solar panels, which is more efficient than other controllers. 4. One Key HMI: P