Solar regulators are integrated electronic amalgamated which do not require replacements. Overload & short circuits. Reverse discharge protection & of opposite polarity. In normal working condition, both forward charge and float charge are available, so that battery life is increased Five charging modes work: pure lighting control, lighting control and timing control, manual operation and debugging mode. Settings and LED display, one button to complete all settings, intuitive and easy to use. Product Description Specifications: Color: Black Material: Plastic Rated Voltage : 12V / 24V (Auto switching) Max. Charge/discharge current: 20A Max. Solar Panel Input Voltage: =50V Stop Charge Voltage: 14.7V/29.4V Low Voltage Recovery: 12.2V/24.4V Low voltage protection: 10.5V/21.0V USB output voltage/current: 5V 2A No load loss: =10mA Temperature compensation: -3mV/Cell/C Operating temperature: -20C~60C Protection: 1. Overload protection 2. Short circuit protection 3. Lightning Protection 4. Undervoltage protection 5. Underpricing Protection 6. Reverse Polarity Protection Package Include: 1 X Solar Charge Controller 1 X User Manual