the way I understand the APC UPS is that with a 1400XL, I can plug 1400 watts of power into it. My confusion is this UPS is running at 60% load when I have a HP Proliant ML350 G2 with redundant power supplies plugged in. According to the documentation, each power supply is 700 watts. With both power supplies plugged in, this UPS should be at 100%. What am I missing?