San Diego County Water Authority

San Diego, CA

Saving ratepayers over $1.7 million in energy costs

Overview

The San Diego County Water Authority (SDCWA) is a public agency serving the San Diego region as a wholesale supplier of water from the Colorado River and Northern California.  The Water Authority works through its 24 member agencies to provide a safe, reliable water supply to support the region’s $174 billion economy and the quality of life of 3.2 million residents.

Installation

SDCWA’s solar power installations were installed in the parking lot and on the roof of the Water Authority’s Kearny Mesa headquarters and its Fred A. Heilbron Operations Center in Escondido. The largest of the three solar energy systems was mounted using a first of its kind, black Sunlink ballasted racking atop several large water storage structures at their Twin Oaks Valley Water Treatment Plant north of San Marcos. The systems will generate enough renewable energy to meet 60% of the power needs for the Kearny Mesa and Escondido facilities and more than 25% of the power needs for the treatment plant.

Benefits

The San Diego County Water Authority financed their solar power installation using Borrego Solar’s integrated power purchase agreement (PPA). Per this agreement, Borrego Solar designed and constructed the solar electric installation on the three SDCWA locations, and will operate and maintain the solar energy systems for the 20 year contract term at no capital expense to SDCWA. In return, SDCWA agrees to purchase the clean renewable energy the installations produce at a predetermined below-the-grid rate. Based on the grid-rates at the time of the installation, SDCWA will save ratepayers over $1.7 million.

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