Outback FM Series MPPT Controllers – Outback was the first to enjoy widespread success with a MPPT controller – their legacy MX-60 showed other major manufacturers that there was a big market for power point tracking. The MX has been updated to become the FM series in 60a and 80a and networks with other Outback equipment through the Hub. 150vdc maximum input with battery banks of 12v, 24v, 36v, 48v or 60vdc. These controllers have built-in LCD screens with 128 days of data-logging. 98% typical conversion efficiency.