San Francisco Office Building Going Net Zero Energy with Help from Vista Solar


DPR Construction’s San Francisco office goes solar, with help from Vista Solar. The 118-kW high-efficiency SunPower solar system is expected to meet 100% of the building’s annual electricity needs.

Solar provider Vista Solar today announced it has completed a 118-kW high efficiency SunPower solar power system for national builder DPR Construction.

Vista Solar designed designed, engineered, and installed the system, which is expected to generate at least 158,000 kWh of clean energy each year. The system will help DPR Construction achieve net zero energy consumption at its new San Francisco office, meeting 100% of the building’s annual electricity needs. The system is even expected to help the building generate a positive cash flow of over $200,000 in its first year of operation.


“Since this is DPR Construction’s first net zero energy designed regional office in the Bay Area, it was critical that we chose the right partner and solar technology to help us achieve our company goals,” says Mike Messick, project manager for DPR Construction.


DPR Construction partnered with Vista Solar to meet a number of unique site challenges in pursuit of DPR’s net zero energy goal. That included installing the solar system on the company’s highly constrained rooftop. To generate the maximum amount of power on the limited roof space, Vista Solar installed high-efficiency SunPower X21/345 solar panels, which produce quite a bit more energy than conventional panels in the same space.


Vista Solar also used SolarEdge inverters, which pair DC optimizers with each panel to produce as much power as possible, even when other panels on the roof are shaded by the adjacent buildings. Silverback Solar racking helped Vista Solar create a custom design solution that accommodated the precise attachment points, 20-foot spans, varying elevations of the barrel roof, and 19 solar tubes.


“While we regularly build much larger projects, the challenge of finding solutions for the site constraints and being able to take part in a net zero retrofit, right in our backyard, made this an inspiring project to work on,” said Vista Solar sales engineer Sam Kim. “Everyone wanted to see DPR succeed.”