Ubiquity doesn't equal commodity.
The New York Times today reported that solar power generation nearly doubled in 2012 (to a total of 7,266 megawatts). In the same story, though, they reported increasing concern regarding quality issues with solar panels.
Just because you can buy a panel from a bunch of companies doesn't mean you should. That's why I want to install panels from a "big name" company that is committed to eco innovation. Working for Panasonic, I have unique insight into our commitment to quality. You may pay for quality up front, but it saves paying for it again and again as you encounter quality problems.