solar is nice, but not exactly cost-effective at those levels. i've looked into it, but it's not something that will recover its cost anytime soon. to install a system capable of 12,000kwh annual production (my average over the last year), you'd be looking to spend at least $20k on materials + installation cost, so probably around $25k. it would take me 11 years to recover the cost, assuming the batteries held out for that long (they wouldn't) and the panels continued to output 100% efficiency over their lifetime (they don't). as you scale down, you're gonna be looking at the same amount of time to recover the cost to install whatever size solar array you're considering. until the cost to install solar reaches $.50/watt and less, it's not gonna be a viable option for a majority of people.
i'm gonna start small though, and install four 100w panels on the hobby shed i plan on building next spring. should generate enough to run some lights and maybe a radio/tv and wifi repeater.