After reviewing all of the bills for both the community, and performing a detailed site walk, Vista Solar was able to identify a design that would maximize the savings potential of solar with the lowest upfront investment for Wharf Plaza. By focusing on the common area meters that served two of the building’s hallway lights and elevators, Wharf Plaza could achieve the greatest savings without having to cover every square inch of their available roof space.
The resulting 79 kW solar system spans two of the three campus buildings. The arrays are comprised of Suntech modules, mounted on the roof using UniRac’s RapicRack ballasted racking solution. Rated for 120mph wind gusts, the racking solution required only 11 attachments (for seismic bracing). At the heart of the system are Solectria 10 and 15 kW 3-phase string inverters. The solar system is estimated to produce 113,980 kWh annually, which is enough to offset 68% of Wharf Plaza’s electricity bill – saving at least $21K on electricity every year. Currently, the system is producing up to 16% more energy than originally estimated on an annual basis – meaning more savings for Wharf Plaza.