Well I received two more electrical bills, the bill for February was $177 and the last bill for March was $142. On average we use about 50 Kwh on a cold winter day and much less nowadays. The installer came three times to our house and made adjustments to the set up. As far as I know the unit was not set up properly asking for auxiliary to early in the process.
Bingo! Depending on the complexity of your system, sometimes it takes a couple trips to fine-tune everything.