Our always on runs at about 275 watts, and often lower. Recently it jumped up to 462 watts soon after several house guests ended their visit. Checking around I noticed the lights were left on in the seldom used guest bathroom. The light draws 208 watts, so turning it off seems to have solved the mystery. It may have been many more days before we discovered this without sense.
208W is a lot for lights. My worst is the basement Flouros/tubes(converted to LED) that use about 120W. Not much of an issue if they don’t get used much.