Carefully consider the types of solar panels you plan on having installed. Long ago, if you didn't have enough roof space, you'd need very expensive high efficiency mono-crystalline panels. There are now more advanced polycrystalline panels and even thin film panels. If you've got enough roof space, you might wish to look at the size of the panels in relation to their output capacity to avoid having insufficient panels that you need more of later.
Solar energizer demo.
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.
When using solar energy for the first time, it's probably a good idea to start out small. A small investment of just a few solar powered garden lights is a great way to get started. You can find them at big box and even home improvement stores. They are as easy to install as any other garden light.