Whether solar saves you money depends on your roof, how much sun it gets, your local electricity rates, and what incentives are available where you live.

For some homeowners the numbers work out well; for others the payback period is too long. The only way to know is to get a site-specific estimate.

When you compare quotes, look at the total system cost, the estimated annual production, warranty terms, and whether you're buying, financing or leasing — each option changes how much you actually save.