Back in our old house in Canberra we decided to install Solar power as well as solar hot water. It suited the house since it was solar passive to a good degree and faced pretty much North.
We started out consuming something like 12kWh per day, but were able to average around 6kWh per day after checking what was using power and reducing the amount we used.
Below is a graph of the measurements I took while we were living there (just after we reduced out usage. You can see the output of the solar panels drop in winter. The really big red peaks in usage are when we needed to turn on the electric hot water booster for the solar hot water.