What’s one of the biggest — if not the biggest — impediment to residential solar adoption? If you said, cost, you’re right.

Well, at least Denver residents are lucky to have One Block Off the Grid (1BOG) in their corner. The group, which facilitates solar installations for homeowners by leveraging strength in numbers (group discounts) announced today that it has started a new campaign in the Denver area. Time is of the essence, however. The program ends October 14, 2010.

To sweeten the deal, SunRun financing is available, meaning that homeowners can have panels installed with zero-down and start saving on their energy bills immediately. What kind of savings can homeowners expect?

Here are a couple of figures that the folks at 1BOG sent along:

• Average Current Bill: $150.00
• Average Monthly Savings: $73.50
• Number of Years to Payback: 8.3 Years
• Increase to Home Value: $17640.00
• Net Cost: $9702.00

Nice! Visit 1BOG’s Denver hub for more info.