NEW Magnum PT-100 Charge Controller – an excellent MPPT (Maximum Power Point Tracker) controller designed to efficiently harvest the maximum available energy from your array. The PT-100 is one of our more popular controllers, as it allows for 200v open circuit and can convert 100A of power. HyperVOC allows for an even higher array voltage, reducing combiner boxes and parallel strings. In most cases, you can use 4 x 24v nominal (72 cell) modules in series. And use the ME-ARC advanced remote option to prioritize power from your solar array and save power from the electricity grid. The PT-100 also comes equipped with a built-in screen, making it easy to program and monitor.