Link: http://www.howstuffworks.com/framed.htm?parent=solar-power-pay-upfront.htm&url=http://www.alternative-energy-news.info/headlines/solar/

From an article found at www.howstuffworks.com:

Not only are you helping the economy and the environment by investing in solar panels at a crucial time for both, it makes more sense to buy them sooner than later to avoid paying constantly rising energy prices. While other technologies do drop significantly in price, such as personal computers, solar panels are a mature technology that has not changed drastically in recent years. Current rebates on solar panels are a great deal now, so take advantage now! These rebates may not be such a great deal in the future once more and more people begin to install solar, so make sure you take advantage of a good situation.