A California Energy Commission-funded project at the Soboba Fire Station near San Jacinto is using a vanadium flow battery to demonstrate long-duration energy storage that does not rely on lithium-ion chemistry. The project was developed by GRID Alternatives with funding support from the California Energy Commission, as part of the state’s efforts to demonstrate LDES technologies.

Policy rationale: resilience in high-fire-risk areas

The Soboba reservation is in a Tier 3 Extreme High Fire Threat Zone and has experienced repeated grid outages, some lasting more than 24 hours. During major incidents, the fire station serves as an emergency response facility, incident command center and community resource. Public Safety Power Shutoff events add another layer of risk.

The microgrid’s vanadium flow battery is designed to provide at least 10 hours of backup power during grid outages and PSPS events.

That duration aligns with the site’s experience of prolonged outages and shows how public demonstration funding can target resilience gaps rather than only bulk-system storage.

What the state is testing

The project tests a non-lithium LDES chemistry at a critical community facility. According to Invinity, vanadium flow batteries use a non-flammable electrolyte and do not have the same potential for thermal runaway as lithium-ion batteries. In a high-fire-threat zone, that safety profile is part of the policy case.

The system also serves the Soboba Band of Luiseño Indians’ fire station and emergency response facilities and is expected to help reduce the facility’s energy costs. Representatives of the Soboba Band, GRID Alternatives and Invinity marked completion with a ceremonial handover last week.

Policy implications

The project illustrates how state funding can support technology diversification and community resilience at the same time. It does not prove that vanadium flow batteries are cheapest for every application, but it provides operating experience in a demanding location. For policymakers, the lesson is that LDES demonstrations can be designed around critical facilities, long outage durations and fire-risk constraints.

California’s support for non-lithium LDES also signals that the state is looking beyond a single chemistry for resilience applications. The Soboba project will be watched as an early example of that policy approach in practice.

This article was assisted by AI analysis. Please refer to the original source for official information.