Description: PWM solar controller is a versatile solar charge and discharge controller, each parameter can be flexibly adjusted to meet different needs of your application. It can be widely used on solar home system, traffic light, solar street light, solar garden light, etc. Features?: [Multi-ports] Contr? their solar with dual USB output & dual DC output, and applicable for lead-acid batteries. [Alloy cooling backplane] It can quickly dissipate heat to prevent the circuit from heating up due to long-time operation term of the device. [Multi-protection] PWM charging method supports overcharge, short circuit protection, battery undervoltage protection, battery compensation function. temperature, battery reverse protection. [LCD display]LCD display to dynamically display the operating data and working conditions of the device. [Automatically] The controller Solar charging can set the time control mode and the system voltage can be identified automatically. Specifications?: Rated charging current (A): 30?A?; 50?A?; 70?A (optional) Color: Black + Orange Rated voltage (Va): 12/24 V automatic USB output?: 2.1?A*2 DC output?: 2 Overload current (V): 13.7V/*2 24V Excessive discharge current(V):10.5-11V/*2 24V Temperature compensation:-3?mv//cell Loss empty load?: Loop voltage drop: Note: Only 30A solar controller does not display charging current, 50A 70A displays charging current.