Solar Makes ‘Unusable Site’ A Power Source

Wastewater treatment plants are becoming a popular site for governments to install solar energy systems. Most recently, the city of Dinuba, Calif., in partnership with Chevron Energy Solutions and Tioga Energy, built a 1.15-megawatt (MW) photovoltaic (PV) system at its wastewater treatment plant, southeast of Fresno. The system is expected to cut the facility’s electricity use by 70 percent.

The ground-mounted array consists of 4,704 PV modules installed on 3,000-pound concrete slabs atop a capped landfill near the plant. The project was engineered and constructed by Chevron Energy Solutions. Tioga Energy financed, managed and owns the project, and will sell electricity generated by the system to the city at a fixed rate, under a 20-year power purchase agreement. Tioga Energy specializes in facilitating long-term renewable energy power purchase agreements for commercial, government and non-profit organizations. These agreements enable these organizations to install renewable energy systems with no up-front capital investment.


image via Chevron Energy Solutions

“The city of Dinuba had a noteworthy vision to transform an otherwise unusable site into a clean energy-generating asset for the community,” said Jim Davis, president of Chevron Energy Solutions. “Chevron Energy Solutions is proud to partner with the city of Dinuba to provide its residents with a new solar energy landmark.”

Chevron Energy Solutions and Tioga Energy have also recently collaborated on a solar canopy project in Hawaii. Tioga Energy also helped pioneer the renewable energy bond financing model known in the industry as the “Morris Model“, with the Morris County Improvement Authority in New Jersey. This innovative model enables governments to issue low-interest bonds to finance renewable energy systems, while partnering with a third-party financier to leverage federal tax incentives.

Lauren Craig is a writer and consultant living in Seattle, WA. She holds an M.S. in International Development from Tulane University, and is co-founder of Sustainable Systems Integrators, LLC., an employee-owned solar energy design and installation firm in New Orleans, LA. She is also certified in PV design and installation by the North American Board of Certified Energy Practitioners (NABCEP).


  • Reply January 21, 2012


    But did the solar plant increase costs for the taxpayer? u00a0What good is 70% solar power (for 25% of the time on average) if it actually increase the city’s costs?

    • Reply January 21, 2012

      Pete Danko

      The city didn’t build and doesn’t not own the plant. It merely provided the land. It’s purchasing the power from the owner. I’ve been unable to find the terms of the power-purchase agreement, but the city says the cost of the power over the life of the contract will be less than the cost of purchasing the power through its utility (PG&E).

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