ihollywoodchina.com

The only factor that can prevent an ordinary person from installing solar power heating and cooling systems is the initial high costs of installing the system. However, if they consider this factor a little more carefully they will soon come to realize that after an initial two to six years payback time which is how long it takes to recoup their investment (through savings in energy costs) they will not then have any significant costs when using their solar power heating and cooling system thereafter.

Therefore, it is certainly worthwhile spending a little extra in the beginning because after the payback period is over there are only gains to be made that will make the investment pay itself back many times over.
Find more on my site Solar Energy Information