Adding solar to a residence also adds value and sell-ability to the home. A wise investment is the house that has low and stable utility bills - and eventually - a positive cash flow. More importantly, each kilowatt of power that comes from a solar system instead of a coal plant is just over 2 pounds of carbon saved from escaping into the atmosphere. For solar grid ties, this means savings of not just dollars but also pounds of carbon! This creates a real difference in the pocketbook and on the planet.
With current rebates and incentives, payback can be achieved in under 10 years on a residential solar grid tie! Besides this straight 'payback' number, one must consider that the residence now owns and produces their own power so, if electricity rates go up, the solar system pays itself even quicker.