Features 1、Industrial‑grade main control chip and large‑screen LCD display, with adjustable charge and discharge parameters. 2、With a complete 3‑stage PWM charging management and dual MOS anti‑backflow circuit with ultra‑low heat generation. 3、The product built‑in over‑current/short‑circuit protection, open‑circuit protection, and reverse connection protection, all of which are self‑healing and do not damage the controller. 4、This solar controller has a built‑in industrial microcontroller, which can automatically manage the work of solar panels and batteries in the solar system. 5、This product is widely suitable for family, industry, business, etc., and is very practical. Specification Item Type: Solar Panel Controller Product Material: PVC Product Specifications: 12V/24V 20A Rated Charging Current: 20A Rated Discharge Current: 10A USB Output: 5V/3A Size: Approx. 148.57mm / 5.8in 139.89mm / 5.5in 55.71mm / 2.2in 77.99mm / 3.1in Package List 1 x Solar Panel Controller 1 x User Manual