I am calculating the run time for a UPS. Can someone tell me the wattage of an ELK M1 Gold both loaded and unloaded? Also, the wattage for the ELK-P412 4 amp power supply? My gut tells me that just because the M1 can supply 2.5 amps doesn't mean it draws 250 watts of power. Same reasoning for the 4 amp power supply.