Usage increase can be attributed to numerous things. Here's just a few examples to keep in mind, especially when moving to a new home.
- Weather: Airconditioners in the summer, heaters/lights/dryers in the winter can be a culprit for higher usage. A great way to see if your energy use has changed dramatically is to compare your energy use (in kWh or MJ) with the same time last year.
- When you moved, did you plug in any new appliances? Appliances with low energy efficiency star ratings can also be the cause of spike in usage.
You mentioned you tried to test the electricity consumption yourself on different appliances. May I ask what kind of testing you completed?