Virgin- most will tell you just pay your bill on time. My old house was 700 square feet (not including basement) and I used about 6 houselholds woth of power for 4+ years. Never a problem. I payed about 1050 this month and that was for a 6k run in this setup. Now I plugged in 4 more lights which will require more AC which will have it go up even more. It's not a problem, just pay on time. This setup has its own meter and bill seperate from my house which I really like. Overall this month the power company got 1350 from me and that is due to go up, I am a great customer