i know that now. I don’t know why rl even sells the 1050watt 85amp 12v power supply. People should always just buy the 900watt 75 amp 12v supply. With 12v power supplies The voltage is the problem not Amps or the wattage. Since the charger has a 47amp Input limit, With a 12 volt power supply the icharger is limited to only about 500watts of usable power. Which is fine for 2s batteries but sucks for 4s and 6s lipos.