Features Safer charging: MPPT, balance charging, boosting charging and floating charging, four-stage charging methods. In current limiting charging mode, if the input power of the photovoltaic module is too large and the charging current exceeds the rated current of the controller, the controller limits the charging current to the rated current for charging. Great Safety:Features internal temperature detection function and battery temperature compensation function. When the temperature of the controller rises to 70°C, the controller limits the charging current to half the rated current. When the temperature reaches 90°C, the controller turns off charging and output. This controls the temperature rise of the controller. Efficient working: 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 reach up to 98%, and the full charging efficiency can reach up to 97%. BETTER DESIGNS Also has the functions of photovoltaic start and lithium battery activation, and the data storage time can be up to 10 years. Good protection: with overcharge protection, over-discharge protection, over-temperature protection, overload protection, reverse polarity protection, etc. Specification: Item Type: Solar Charge Controller Voltage: DC 12V or 24V, automatic detection. Package list: 1 x solar charge controller. Small note: The user manual is the QR codes attached to the product, which can be displayed after scanning. Package List 1 x Solar Charge Controller