Check the listing for details. 30A Solar Panel Battery Charge Controller LCD Regulator 12V/24V Auto Dual USB US. Color: Blue, Condition: New. Listed at 8.99 USD. Description: - Advanced maximum power point tracking (PWM) technology, the efficiency is not less than 99.5%. High-quality components improve the system performance, and the maximum conversion efficiency is 98%. Super fast tracking speed and guarantee tracking efficiency. - Large screen LCD display, charge and discharge current display, cumulative power generation and discharge power query, temperature display, light control + delay control; adjustable charge and discharge parameters, with power-off memory and other functions. - Dual USB output, the maximum current is 2.5A. Equipped with all necessary protection devices, the control parameters of the system are adjustable, easy to set up and operate. Built-in overheating, overcurrent, short circuit, open circuit protection, fault elimination, controller automatic recovery. Two-way MOS tube anti-backflow circuit, high-power charging mode, ultra-low heat. - Built-in short circuit protection, open circuit protection, reverse connection protection, overload protection. Reverse current protection, low calorific value, with self-recovery function, will not damage the controller. Package List: 1 x Solar Panel Battery Charge Controlle Built-in industrial microcontroller, fully 4-stage PWM charging management. Large LCD display, all parameters adjustable. Built-in short circuit protection, open circuit protection, reverse connection protection, overload protection. PWM Matching of mode to battery type: Please set the controller to the correct mode. B1 For lead-acid batteries B2 For lithium ternary batteries B3 For lithium-iron batteries Double MOSFET reverse current protection, low heat generatio