The Classic SL-250 MPPT charge controller is a simplified SOLO SOLAR version of the Classic 250 with simplified menus. The Classic SL-250 has a graphic panel and ground fault but no arc fault or Ethernet capability. The Classic SL-250 has a maximum output current of 63 amps, an operating voltage of 250 volts and works with 12 to 72 volt battery systems. Like the entire Classic line, the Classic 250-SL features MidNite's exclusive HyperVOC, which extends VOC limits when necessary. With a simplified menu, these SOLAR-only MPPT charge controllers are easy to set up and a breeze to install!