In efforts to save money and energy, a small town in the United Kingdom recently shut down its public restrooms for renovation. The new bathrooms were equipped with two solar panels, one to power the water system, and the other to convert sunlight into electricity.
What is interesting about this improvement, is that it produced above and beyond the amount of energy needed to power the restrooms. So much, in fact, that the excess amount of energy was sold to the National Grid. As a result, the company who commissioned the project was able to not only save money on those specific restrooms, but on other operations as well.
Source: BBC News