Really? Why? It's quite interesting to hear that more people are investing in solar panels. Are they really so good now that you actually expect them to provide all of the electricity needed to run your house? You have a very large house, if I recall correctly, so that is very impressive! Also, if I understood correctly, it involves some kind of tax rebate? How does that work there? Is it state or federal? Sweden had a tax rebate going on a number of different energy saving systems at one point, but I don't think solar panels were included (maybe considered a bad choice for obvious reasons ;-)?).
Anyway, good luck with getting all of that set up! My parents had solar panels put in many years ago and liked them, though the ones they had only provided enough electricity to heat water. Still, it was a start and quite good for that time period.