SOLAR CONTROLLER: This Solar Panels Battery Charge Controller adopts advanced maximum power point tracking (MPPT / PWM) technology, ultra-high efficiency, and the maximum conversion efficiency is 98%. LARGE-SCREEN LCD DISPLAY: Use the large-screen LCD display to accurately display the charge and discharge current. At present, MPPT tracking auto-focus charging has high charging efficiency. The charging process does not stop detection and two-way focus tracking. MULTI-FUNCTION: Using this Solar Panels Battery Charge Controller, you can query the accumulated power generation and discharge power, adjust the charge and discharge parameters, as well as light control and delay control, power-off memory and other functions. SAFETY: Built-in overheating protection, overcurrent protection, short circuit protection, open circuit protection, troubleshooting, controller automatic recovery and other functions. 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. NOTES:1. The charge regulator is suitable for lead-acid batteries: OPEN, AGM, GEL, nickel hydride, lithium, lithium ion batteries or other batteries. 2. The controller can only use photovoltaic panels as a charging power source. Do not use DC power or other power sources as a charging power source. 3. After repeated cycles, the capacity of the old battery may decrease, easily falling below 8V, which will cause the controller to shut down (the LCD screen becomes completely dead) .