As you prepare to buy a solar power system, don't underestimate the importance of recommendations. Talk to everyone you know, whether they are friends, family members or even coworkers. You may be surprised by the number of people that have experience with these systems. They can tell you what they found out along their journey and guide you in the right direction.
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.
It is crucial to speak with other homeowners who have invested in solar panels before you consider purchasing your own green energy system. Ask about price, performances and what kind of issues they ran into. You could also get some references for vendors, contractors or repairmen. Once you have your own system, do not hesitate to help other homeowners who are interested.