And as SMUD has done.
There are a lot of things that go into reducing energy costs but the OP was looking at rates and that is what I am concerned about as well. If I could take my current rates with me to the new house I would install an 8kW DC system. With the new rate system where the expensive (read high credit) rates are moved to low solar production times.
In CA we get retail credit for the overproduction but to turn it into cash we get replacement cost with is wholesale rate. PG&E quoted me 3 cents while I was working on a design for a friend. I do not see how you can build a system with the idea you are making money at 3 cents.
Our parts have to be approved which make the cheep chinese part off limits. Approved parts typically cost twice what cheep parts cost. 60 to 80 cents per DC watt are good prices for 340 watt panels. Inverters will run 25 cents / watt and racking is an other 20 cents. If you can work for free your system cost will probably be $1000+ the commodity parts.
As I said before the winter rate is 9.65 except for 3 hours each week day, when the sun does not shine. I do not see a reasonable return on investment with the new rates. I would like to be able to plug the new rates in and run them with the history I have on this system and see how much difference there is. I could be wrong and wish that I installed solar at the new house.