It is great to see how many businesses are realizing the benefits of going "green", but now it seems that there are many companies that are only in it for monetary reasons instead of because they believe in it.
The fact that the government is actually driving business in that direction is also a good thing, but people need to be aware that there are a lot of companies in industries that they have no business being in, such as the photovoltaic industry. Too many companies are out there learning as they go as opposed to companies who are well established in the solar industry. There are companies like Candelaria Electric who were in the PV industry well before all the federal tax incentives and who are solar advocates as opposed to just solar profiteers.
So when you are deciding what installer to go with ask to see photos of previous projects and ask for referrals from their previous customers and go to one of their completed projects and look at their craftsmanship. There are companies that will say they have been in business for 10 or 20 years but how long have they really been doing solar?
A good indicator how long a company has been in the industry is by looking for key words in their name. Typically a company with the words "Green", "Eco", or "Renewable" are new bandwagon businesses. There are always exceptions but 90% of the time this is true.
A solar company that helps you reduce your current electrical consumption in order to save you money by using less solar panels or point out shading problems in order for you to get the most out of your system is the kind of company you want to work with.