It is very interesting how electric cost vary so much !
I have been tracking electric usage since we build our new home and attached are a few plots.
The house is 2,700 square feet, 2 story. Instead of solar we decided to build a tighter home. So, 2x6 exterior walls, spray foam insulation, conditioned crawlspace and triple pane windows. Heating and Cooling is all electric and we included two ERV systems to circulate stale, inside air with fresh, outside air. That system is about 80% efficient at heat exchanging.
These construction methods really did help. Our previous home, built in 1990 and 2,600 square feet had an average cost for electric of $300/month. This home is about $185/month. The thing is in the previous home we were both working out of the house so for 10 hours a day it was dormant. In this home we are here all the time.
Edit: we do use propane for a fireplace and backup generator. That cost is maybe $10/month.