I’m in this same boat. I get letters from the power company all the time about how I’m using more power than anyone around me. The heat in my place has been kept around 62 all winter, occasionally allowed to get colder. It’s a pretty modern build for a house too. I actually used my PC to heat just my bedroom over winter which should be far more power efficient the heating every room. The letters I get try selling me how I need to or could be more efficient like genius ideas like “turn down the thermostat”… its already nearly almost off, just enough to make sure pipes don’t freeze.

Only thing that really changed was they installed a new smart meter last fall, of which I had no say.