Some of us remember the surge in solar and other renewable technologies in the late 70s and early 80s, and how, when incentives for them gradually disappeared, the market seemed to go with it. A large part of the problem, at least regarding residential solar, was further hampered by the surge in solar contractors, who seemed to pop up overnight and were out to make a quick buck. Without a strong professional image, the industry had very little to prop itself up with when the tax credits went away. What is the risk of this history repeating itself?