A 50-kilowatt array has been installed at Bonnaroo paid for by donations from attendees. Voluntary contributions from Bonnaroo’s roughly 80,000 annual attendees, collected through ticket sales since 2012, footed the bill for the system. Bonnaroo reserves opt-in donations exclusively for onsite sustainability improvements. In addition, festival organizers added a $1 fee to every ticket sold in 2012 to generate additional money for green initiatives. The solar installation directly resulted from both types of fan support.This is the first permanent solar system installed at a major American music festival. The clean energy produced by the system is equivalent to 20 percent of the power consumed at Bonnaroo during the annual four-day music and art extravaganza. David Bolt’s company, Sustainable Future, installed 196 SolarWorld panels. David Bolt stated that his company will supply an additional, temporary solar array at this year’s festival, which will provide shade as well as electricity for fans. “An important aspect of sustainability is to use land efficiently. Employing panels to create shade for fans next to the solar stage at Bonnaroo is a great way to accomplish this.” The system, mounted on the roof of a metal structure in the backstage area, will generate more than 61,000 kilowatt-hours of energy each year – equal to about 20 percent of Bonnaroo’s total annual power needs. While the system will not be visible to patrons, fans will peruse a solar display in “Planet Roo,” an area devoted to sustainability.