I’ve only noticed this with my central air, but after a recent month of heavy usage mid-summer, Sense is showing that the AC used 636 kWh while total usage was only 564 kWh, implying the AC used more than 100% of total energy.
Obviously that’s impossible, so either total usage us being undercounted, or AC is being over-counted. Which sounds more likely? Total usage has tracked well with my power bills so far, past month was 600 vs 608 kWh and was due to a 1 day difference in billing period.
And here, the numbers obviously don’t add up to 100%