Our 60A MPPT Charge Controller With Bluetooth is the most efficient type of charge controller. With up to 99% tracking efficiency, it ensures maximum power point solar charging that gets more energy to your battery bank. Capable of automatically detecting 12V/24V lead acid battery systems, this crucial component is preset to also work With Gel, Flooded (wet cell), Sealed, and even Lithium batteries. Features: 12V /24V Automatic System Recognition. Embedding Imported Advanced Microchips - Higher Monitoring Accuracy & Better Battery Protection. Advanced MPPT Technology With up to 99% high tracking efficiency, and Lithium-reawakening function. 4 Deep Cycle Battery Compatible: Gel, Flooded, Lithium-Iron Phosphate and Sealed/AGM. Multiple Electronic Protection Features, including over-charging, over-discharging, reverse polarity, over-load, and over-temperature.