This is a practical solar system controller. It has a built-in industrial micro controller chip and fully 3-stage PWM charge management. The build-in short-circuit protections and over-load protections is more safe for using. It can be applied to solar road lamp, solar pest killinglamp, solar plate installation and so on. Features: Adopt industrial micro controller chip. Large LCD screen for display. Auto memory function. Fully 3-stage PWM charge management. Dual USB charge port. Build-in short-circuit protections, open-circuit protections, reverse protections and over-load protections. Dual mosfet reverse current protections and low heat productions. Specifications: Type: 30A Material: plastic Color: blue & black Rated voltage: 12V 24V auto Application: solar system controller Current: 30A USB output: 5V/3A Standby current: 10mA Working temp: -35~+60 Floating charge voltage: 13.7V (adjustable) Discharge up to voltage: 10.7V (adjustable) Discharge recovery voltage: 12.6V (adjustable) Item size: 14.8 * 7.8 * 1.5cm / 5.83 * 3.07 * 0.59in Item weight: 150g / 5.29oz Package size: 15 * 7.8 * 3.5cm / 5.9 * 3.07 * 1.38in Package weight: 180g / 6.35oz Note: This product cannot be used withlithium batterytogether. Package List: 1 * Solar Charge Controller 1 * User Manual