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Public-service rooftop array producing energy, saved about $40,000 since 2021
Summary
City staff reported that a 108.8‑kilowatt rooftop solar array at the Public Service Department, installed in fall 2021 at a reported cost of $231,777 including battery backup, has produced meaningful energy offsets and roughly $40,000 in savings to date.
City staff updated the Sustainability Advisory Board on the performance of the rooftop solar array at the Public Service Department. "It's a 108.8 kilowatts," staff said, noting the system was installed in fall 2021 and that the presentation lists the total project cost as $231,777, which staff confirmed after a brief transcription error during the meeting. Staff said the array includes battery storage and that a peak month in February 2024 provided nearly half of that facility's electricity demand.
Staff also provided greenhouse‑gas avoidance figures tied to the array, saying the system has displaced CO2 emissions equivalent to the annual use of roughly 121 gasoline‑powered passenger vehicles (about 1.3 million miles driven by an average vehicle). The board discussed panel longevity; staff said manufacturer guidance showed meaningful production for at least 20 years with gradual efficiency declines thereafter. Staff offered to circulate the full presentation and the real‑time production link to members.
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