If you are comparing prices on a solar energy unit, make sure you are comparing apples to apples. Some companies might offer bargain priced systems, but these systems might not hold up, be backed by a credible warranty or function in a way that really saves you money. Keep in mind that sometimes it is better to spend a little more now so that you save a lot more in the long run.
If your roof cannot to support the weight of photo-voltaic solar panels, you can save a lot of money by investing in thin film solar panels. These panels are very light and flexible, which makes the installation much easier and affordable. Their higher price is also justified by their efficiency.
Converting your whole house to solar power can be expensive. Before you commit, look at how much you can afford. The initial investment will be very large, but there will come a time when you will break even, then start realizing your savings. Work out the numbers so that you will know how it will affect your long-term budget.