Matt, Sorry, the SSs are on Delta 240V 3ph. I am headed out now to see what the VF1 pulls at steady state. I use a Fluke 336 for this and it has yet to lie to me. I would agree that something may be using some serious power like your wife left the hair dryer on for a month! I would really want to find the source of that draw if my bill hit half of that here. You may not have a problem but you will need to get a food meter and a pad of paper to figure it out.