The power savings have been as expected which is fantastic. Our most recent bill was for around $43 dollars (previously we were paying around $240 per quarter). Our power bills include an ambulance fee (around $26) as well as a typical fixed connection charge. During this period, the weather has been anything but conducive to effective solar power generation. In addition, my parents were staying with us for part of the period (and my mother is not quite as power conscience as I would like her to be). So to come out with only a $43 dollar bill is outstanding.
We have been trying to do certain activities at night time, such as using the dishwasher, laundry, baths and showers. Often the computer was being run during the day, but it is a energy efficient laptop. I recently put a timer on the sewage system, so that it only runs during part of the day. This makes a considerable difference to our base power usage and extends the life of the sewage system aerator.
The other great thing is that two other properties right beside me have also installed solar power (they are larger installs as well). I know that my installation helped convince one of my neighbours to take the plunge, which is a positive influence.
So all in all, I am quite impressed with how we have come out. And in another 2 or so years, this system will have paid for itself. Not too bad!