Features This solar charge controller helps you automatically manage the work of your solar panels and batteries, with a built-in industrial microcontroller, 100% new, high quality, reliable and safe. The solar charge controller is equipped with overcurrent protection, short circuit protection, reverse polarity protection, low voltage, overcharge protection, 3-stage PWM charging management, stable performance and strong practicality. This solar charge controller helps you safely increase system efficiency and extend battery life, beautifully made, smooth and delicate in appearance and durable. The charge controller should first be connected to the battery, then to the solar panel and finally to the load. The disassembly sequence is opposite to the wiring sequence, I believe it can make your life more convenient. The solar panel controller is waterproof and moisture resistant to avoid component damage or short circuit failure. The connection must be firm to ensure good contact, a wide spectrum of action and visible results. Specification: Item type: solar charge and discharge controller Material: ABS Rated voltage: 12V/24V (automatic voltage detection) Maximum load current: 10 A. Solar panel input voltage: 12V-20V/20V-40V If the length is less than or equal to 1 m, the voltage drop of the charging circuit is less than 0.55V If the length is less than or equal to 1m, the voltage drop of the circuit is less than 0.05V Full separation: 13.7V-14.4V/27.4V-28.8V Low voltage shutdown: 10.5V-11V/21V-22V Temperature compensation: -3mV/°C/cell. No-load loss: ≤10 mA. Maximum wire thickness: 2.5 mm². Ambient temperature: -25°C to +55°C. Package list: 1 x controller, 1 x description Package List 1 x Controller 1 x Description