City of Orinda and Contra Costa Library Activate 300-kWh Battery Backup and Clean-Air Center at Orinda Library Auditorium

Emergency preparedness coordinators with the City of Orinda, facilities engineers from the Contra Costa County Library, and resilience planners with the Moraga-Orinda Fire District activated a 300-kilowatt-hour lithium-iron-phosphate battery microgrid and a MERV-16 Clean-Air Filtration Center on Saturday evening at the Orinda Library and Auditorium complex at 26 Orinda Way. Positioned steps from the Orinda Community Center and the Orinda BART pedestrian bridge, the two-story hillside facility serves as Lamorinda's primary public refuge during Public Safety Power Shutoffs (PSPS), winter windstorms, and regional wildfire smoke advisories.

During the autumn resilience retrofit, electrical contractors coupled the library's existing 85-kilowatt rooftop solar array to an outdoor fire-rated Tesla Megapack-class modular battery cabinet and an automatic islanding transfer switch. When utility transmission lines de-energize, the microgrid transitions the 200-seat Orinda Library Auditorium, the Art Gallery, public restrooms, and the free high-speed municipal Wi-Fi network onto solar-and-battery power in less than 100 milliseconds.

Inside the mechanical penthouse, HVAC technicians upgraded the building's air handlers with positive-pressure hospital-grade MERV-16 pleated filters and activated-carbon beds verified by the Bay Area Air Quality Management District. Even when outdoor Air Quality Index (AQI) levels exceed 200, indoor fine particulate (PM2.5) concentrations remain below 8 micrograms per cubic meter, while dedicated 120-volt medical-device benches allow residents to power home oxygen concentrators and refrigerated medications.

The $510,000 resilience upgrade was funded through a California Office of Emergency Services Community Power Resiliency grant and the Friends of the Orinda Library. Residents can check emergency center activation alerts on the City of Orinda Emergency Preparedness Portal.