For some case studies, check out builditsolar.com
For current prices and lots of helpful system info, check out renvu.com
You'll have to register to see prices at renvu, but it's worth it. The site really does a good job at explaining the parts and how they work together, as well as provide helpful information to help you decide on a system that will meet your needs. HINT: new panels are much cheaper when you buy a whole pallet.
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