My electric bill is a hard one, it's billed for two apartments actually. I pay electric for my whole building. It has never been over $300- ONCE it hit that mark, and the outdoor temps were close to a hundred with high humidity for a couple weeks straight- and that includes a 2200 watt grow, 3 air conditioners, 2 refrigerators, a deep freezer, a dryer used by 3 people, a ginormous TV, my ongoing construction projects, 2 computers, 2 coffee pots, etc etc etc. In winter it's quite low actually. Usually around a hundred bucks. I literally heat my bedroom with flower room exhaust and ballast heat.
The a/c that relates to my grow is in the room that my flower room intakes from.