Solar Powered Billboard and Power Plant

Over the 20- to 25-year life span of the billboards converted to renewable energy, we will return an untold amount of renewable, emission-free energy to the power grid while demonstrating in a very graphic manner to the public the payoff that comes with renewable energy. 

In the long run, this will mean significant savings for Lamar. The lifespan of these systems allows them to be amortized, giving us a very logical business rationale for incorporating systems such as these on a widespread basis.

http://cleantechnica.com/2010/04/30/billboards-in-florida-to-be-powered-by-wind-solar-energy-will-form-1-mw-distributed-power-plant/