$547.00 a month?''Houston we have a problem".This sounds crazy high.I might hit $250.00 in the the summer running the central air.You might want to check in to natural gas as a heat alternative, allot cheaper than elec. heat.I use oil for heat,I added a free standing pellet stove as a heat source.It cut our oil consumption big time....You might want to check into a solar alternative,my one neighbor got the whole shabang,With very little out of pocket expense,they have an agreement to sell their unused power back to Elec. Co. and there bills are close to zilch.