Flexmax mppt60flexmax mppt80nominal battery voltages12, 24, 36, 48, or 60 vdc (single model - selectable via field programming at start-up)maximu adjustable current limit80 amps @ 104° f (40°c) with adjustable current limitmaximum solar array stc nameplate12 vdc systems 900 watts / 24 vdc systems 1800 watts /12 vdc systems 1250 watts / 24 vdc systems 2500 watts /48 vdc systems 3600 watts / 60 vdc systems 4500 watts48 vdc systems 5000 watts / 60 vdc systems 7500 wattsnec recommended solar anay stc nameplate12 vdc systems 750 watts / 24 vdc systems 1500 watts /12 vdc systems 1000 watts / 24 vdc systems 2000 watts /48 vdc systems 3000 watts / 60 vdc systems 3750 watts48 vdc systems 4000 watts / 60 vdc systems 5000 wattspv open circuit voltage (voc)150 vdc absolute maximum coldest conditions /145 vdc start-upand operating maximum