Check the listing for details. 2Pack MPPT Solar Charge Controller 12V 24V 36V 48V PV Battery Regulator Dual USB. Color: Black, Condition: New. Listed at 53.98 USD. Features: Large LCD display, support battery working status display, solar panel working status display, mode control display, load output status and each parameter display, normal and fault status display. 7 operation modes are charging mode, light control mode, light control + time delay control mode, general control mode, manual control mode, timing control mode and test mode, the test mode is only for factory test use. Four kinds of voltages automatic identification, it will automatic identify DC12V/24V, DC36V, DC48V by itself. Automatic focusing tracking charging, high charging efficiency, nonstop detection during charging, bidirectional focusing tracking. Equipped with time setting function and parameter values setting function. Charging control function is not limited to any mode re.