SolaMr 60A MPPT Solar Charge Controller 12V/24V/36V/48V Auto with LCD Display Solar Panel Regulator Max 180V Input for Gel Sealed Flooded and Lithium Battery-CM-60AAdvanced Maximum Power Point Tracking (MPPT) technology,with efficiency no less than 99. 9%. High quality components,perfecting system performance,with maximum conversion efficiency of 98%. 12 24 36 48V DC automatic identification of the system voltage, support for different types of batteries such as gel batteries, sealed batteries, open batteries, lithium batteries and other battery charging procedures. Temperature compensation function, automatic