Would you take investment advice from a random stranger?
The solar industry is still relatively new. It's going through all kinds of growing pains, from determining the best solar incentives and financing options to figuring out the best materials for solar panels themselves. One of the ways in which the industry has yet to really settle is training: for most highly-skilled trades, there is a proscribed certification process. For solar installers, the single most recognizable professional benchmark is getting a voluntary NABCEP certification. (NABCEP is the North American Board of Certified Energy Practitioners, in case you were wondering. It's a mouthful.) The organization makes a great argument for certification:
What we do at GetSolar.com is educate consumers of all kinds about the values of solar energy and help them determine if solar is right for them. Then, we connect those consumers with qualified, experienced solar electric or solar thermal installers who can provide competitive quotes. This means the consumer doesn't have to worry about whether or not the installer behind the quote has a good service record, or up to date insurance and licensing, or good business credit: we've taken care of all that already.