The FLEXmax family of MPPT solar charge controllers raises the bar for high performance solar controllers. OutBack's ingenuity and engineering experience has been combined to maximize the output power of your expensive solar array. Their real time active Maximum Power Point Tracking (MPPT) solar charge controller system ensures that your solar array is operating at its peak power point regardless of age, shading or environmental conditions. Systems with large solar arrays are now a snap thanks to the FLEXmax 60's 60 amp and FLEXmax 80's 80 amp DC output current rating for 12, 24 or 48 V solar panel systems.