Anyone know a good resource for information regarding solar panels for home use? We're moving into a new house, and at this time I don't have the money to put up a whole array like I would prefer to. I saw a DIY kit online that says it generates 20W. Looking at our last utility bill, I notice that in the previous month we averaged 16.9 Kwh of use per day. I'm not knowledgeable about such things, but I'm guessing that this 20W system, at around $500 would take about 823 years or so (just an estimate) to pay for itself.

Excuse my mediocre math and logic skills here, but if our daily usage was 20Kwh, and a solar panel was generating 20W per day, does that mean the solar is creating 1/1000th of our daily use?

I need to get educated!