I'm at a loss to explain the increase. Your newer fridge should most likely
be using less rather than more energy than the older one. This page has
a link to refrigerator usage database(the model number is usually at the
bottom of the front after you open the door).
http://www.homeenergy.org/consumerinfo/ ... rticle.htm
There are electrical units you can plug into the wall, then the appliance
that will measure the actual amount used. About $30-$40.
Perhaps some of your appliances had a standby mode, which was off while
you were in the apartment but which you inadvertently activated once you
moved. However, I can't imagine that would be anything like $20 more.
You said the cost doubled, but not the usage. Have you compared the price
per kilowatt?