I've wanted to do this too some day. I would double up on the panels and have a battery bank. That way the excess is stored to run at night too. You'd basically need four 200 watt panels I guess.
Here is an awesome site for cheap panels. I always keep an eye on them.
http://www.wholesalesolar.com/solar-panels.html
Amazing how much the prices have dropped in years. $1 a watt or less. The panels are DC. I wonder if you could also just skip all the other stuff and just run them direct to a DC motor pump. It would vary depending on how much light and energy you are getting at the moment. So your water might be a trickle one day and a river the next. But it would save massive money. I'm sure you'd need some limiters or something else but I'm sure it could be done.
And my god.....California. That place is ridiculous. They screw you on everything. Prices and taxes, fees, bridge tolls, water and sewage, garbage, DMV fees, everything is insane there. Often it's 4 times the cost for many things compared to the rest of the country.
We pay .06 to .08 kwh in Oregon.