In 1979, the Carter administration installed 32 solar thermal panels on the roof of the West Wing to provide hot water for the building. In 1986, the Reagan administration removed them when the roof was resurfaced. So what happened to them? Scientific American has a detailed story.
Fascinating, after seeing pictures of the solar panels on this site I always wondered what became of them.
I wish President Obama would install new ones to set an example for the rest of the country, but can see why he would be reticent about crowing over how Carter was right and Reagean was wrong considering the partisan environment in Washington.