In December 2009, Sullivan Solar Power completed a 124kW solar project for the Associated Students of SDSU's newest facility, the AquaPlex swimming pool. The 3-phase solar array is the largest photovoltaic system on campus to date. The groundmount PV system was challenging as it required tens of thousands of pounds of equipment to be moved into place on an excessively steep hillside slope, tying the system into the campus grid, while not disturbing student activities and staying on budget. The installation incorporated eco-friendly earth screws, which required no excavation or concrete foundations. When the project first broke ground, it was one of the first installations in the nation to use the earth screw technology, which has since become much more widely used. This project was paid for by the student body of San Diego State University through a self-imposed fee for sustainable upgrades to their facilities; it will save the University more than $35,000 a year in utility costs.