Upgraded version of solar panel controller: compatible with 12V 24V system. This solar charge controller helps you automatically manage work of solar panels and batteries through a built-in industrial microcontroller. There is no need to reset it when battery is exhausted, because it will memorize parameters set by user. You can also charge mobile phones, tablets, and personal computers through dual USB output 5V/2.5A (maximum). Safe use: Equipped with overcurrent protection, short circuit protection, reverse connection protection, low voltage, overcharge protection, and 3-level PWM charging management. This 30A solar charge controller will help you safely improve system efficiency and extend battery life. Please note: The charge regulator is only suitable for lead-acid batteries: OPEN, , GEL. Other batteries are not supported. If battery voltage is lower than 8V, the solar controller will automatically shut down to protect life of your battery. LCD screen: The LCD screen allows you to understand status and data. You can also switch mode and parameter configuration conveniently, and use controller in different places such as home, industry, and business. Colour: Black Material: ABS Size: 13.3 x 7cm Package Contents: 1 * solar controller Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.