Feature 1 Built in short circuit protection, open circuit protection, reverse protection and overload protection. 2 Can automatically manage the work of solar panels and accumulators in the solar system, with high work efficiency. 3 The solar charge controller is compatible with 12V and 24V systems, and the voltage 12V and 24V are automatically recognized. 4 Made of high quality materials, this solar charge controller is sturdy, durable, not easily damaged, and has a long service life. 5 Adopts sophisticated production technology, has excellent performance, simple operation and convenient use.Item Type: Solar Charge ControllerMaterial: ABSVoltage: 12V 24V Automatic RecognitionMaximum Power Generation Current: 10A 20AUSB Output: 5V 2ANo Load Loss: <20mACharging Method: For PWM Package List1 x Solar Charge Controller1 x Bolt Pen8 x Screw Accessories1 x User ManualNoteThe controller will generate heat when it is running, please be careful to install the controller on flat and well ventilated surfaces