Features Industrial grade main control chip and large LCD display with adjustable charging and discharging parameters. Built-in over-current/short circuit protection, no-load protection and reverse polarity protection, all of which are self-healing and will not damage the controller. This product is widely used for family, industry, business, etc. and very practical. With complete 3-stage PWM charging management and dual MOS backflow prevention circuit with extremely low heat generation. The built-in industrial microcontroller can automatically manage the work of solar panels and batteries in the solar system. Specification: Item Type:Solar Panel Controller Product material: PVC Product specifications: 12V/24V 30A Rated charging current: 30 A. Rated discharge current: 10 A. USB Output: 5V/3A Size: approx. 148.57 mm / 5.8 inches. 139.89 mm / 5.5 inches. 55.71 mm / 2.2 inches. 77.99 mm / 3.1 inches. Package list: 1 x solar panel controller. 1 x user manual (English language not guaranteed). Package List 1 x Solar Panel Controller 1 x User Manual