The FLEXmax 60 from Outback Power is a Solar Charge Controllers with System Voltage 12 to 60 V, Rated Current 60 A, Power Rating 750 to 3750 W, Efficiency 98.31 %, Operating Temperature -40 to 60 Degree C. Tags: Maximum Power Point Tracking (MPPT). More details for FLEXmax 60 can be seen below.