Costco had a limited time special discount on Solar electric systems for Arizona, California, Colorado, Hawaii, and Oregon for Costco members.

A typical system priced 1/10/2009 for Colorado:

$ 9,697.22 Solar Equipment – 3Kw system
$13,162.97 Installation
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$22,860.19
- $10,780 Colorado rebate
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$12,080.19 Costco Member purchase price

Possible additional savings:
- $92.40 1% rebate from Amex TrueEarnings Card
-$184.80 2% Costco Executive member reward
-$3624 Federal Tax credit
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$8178.99

Pretty sweet deal!  Check with your local Costco and tax adviser for your current special deal.

Sungevity has a free solar panel analysis for California residents.

Thinking about solar – Are Solar Panels for me? helps you decide if they are right for you.