City of Downey

Overview

Downey sought to modernize its municipal infrastructure while ensuring reliable power and cost stability for essential services. CEG structured a Power Purchase Agreement that leveraged federal tax credits and incentives, delivering on-site solar power at a cost lower than grid electricity. The phased program ensures Downey’s long-term energy needs are met through renewable generation, storage, and future efficiency upgrades.

Solutions

CEG designed and installed rooftop and parking canopy solar PV arrays across city facilities, using hybrid racking to minimize roof penetrations and preserve warranties. Four 250 kW battery energy storage systems (2.22 MWh total) were integrated with microgrid controllers, enabling real-time monitoring, peak load management, and resilience strategies. Net Energy Metering Aggregation allowed Downey to offset electricity usage across smaller facilities by leveraging generation at larger sites. Phase II, now underway, includes EV charging infrastructure and energy efficiency measures to further maximize sustainability and cost-effectiveness.

Results

Phase I delivers $475K in verified Year 1 cost avoidance, producing 2.68M kWh annually, with net annual savings of $150K+ after PPA costs. The city achieved a 76% reduction in CO₂ emissions across its facilities. Over the program lifetime, total utility cost avoidance is projected at $10MM, with resilience and reliability enhanced through on-site renewable generation, battery storage, and microgrid controls.