Check the listing for details. 100A PWM Solar Panel Kit Regulator Charge Controller Auto Focus Tracking 12/24V. Color: Black ＆ Orange, 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- heat. - Built-in short circuit protection, open circuit protection, reverse connection protection, overload protection. Reverse current protection, low calorific , with self-recovery function, will not damage the controller. - Real-time display of temperature, charging current and discharge current. Current autofocus PWM tracking charging, high charging efficiency, charging process does not stop detection, two-way focus tracking. Specifications: Package Included: 1X Solar Panels Battery Charge Controller 1X User Manual Notes: 1. The charge regulator is suitable for lead-acid batteries: OPEN, AGM, GEL, nickel hydride, lithium, Liions, or other batteries. 2. This controller can only use photovoltaic panels as charging power. Do not use DC or other power as charging power.3.The LCD display has an error of 0.2 V- 0.3 V, but this is normal4. Old batteries may be degraded the capacity after hundereds of cycles, easily drop lower than 8V, which results in the controller will be shut off (LCD screen become totally ''DEAD''). On Oct 29, 2023 at 19:27:17 PDT, seller added the following information: