1、Efficient Work: MPPT tracking and synchronous rectification as well as dual peak and multi peak technology can quickly track to the maximum power point, the tracking efficiency is not less than 99.5%, the maximum conversion efficiency can get up to 98%, and the full load efficiency can get to 97%. 2、Safer Charging: MPPT, equalizing charging, boosting charging, and floating charging, four stage charging methods. With current limiting charging mode, when the input power of the photovoltaic panel is too large and the charging current exceeds the rated current of the controller, the controller will limit the charging current to the rated current for charging. 3、Great Security: Has internal temperature detection function and battery temperature compensation function. When the temperature of the controller rises to 70℃, the controller will limit the charging current to half of the rated current. When the temperature reaches 90℃, the controller will turn off the charging and output. Thereby controlling the temperature rise of the controller. 4、Good Protection: Comes with overcharge protection, over discharge protection, over temperature protection, overload protection, reverse connection protection, etc. 5、Better Designs: Also has the functions of photovoltaic startup and lithium battery activation, and the data storage time can be up to 10 years. 1 x Solar Charge Controller Item Type: Solar Charge ControllerVoltage: DC 12V or 24V, automatic recognition.