It is important to know that about the two main types of photo-voltaic solar panels. The less expensive types are the poly-crystalline panels, but they also are less effective than the mono-crystalline panels. You should invest in a very efficient solar energy system if that is something you can afford.
When most people think about solar energy, they think that it has to cost a lot of money, but it doesn't. If you want to use solar energy, but you have a limited budget, you can install solar powered lights in your yard. This is a good way to save energy without spending more than you can afford.