Big Picture
San José’s Planning Commission approved a conditional use permit (CP24-015 / ER24-139) for a 100 MW battery energy storage facility at 6150 San Ignacio Avenue on an approximately 5.5-acre site currently used for vehicle storage. The project includes battery modules, inverters, and a collector substation, with extended construction hours including Saturdays. Staff said the project is consistent with the Industrial Park zoning and General Plan designation, and they recommended approval. The City also found the project CEQA-exempt, citing consistency with existing plans covered by the City’s certified EIR framework.
The discussion centered on safety, especially in the shadow of Moss Landing. The applicant (New Leaf Energy) argued that “first-generation” systems like Moss Landing (2017–2018 era) used more volatile NMC chemistry and were often housed in large warehouse-style buildings with inadequate separation and suppression, allowing thermal runaway to propagate. In contrast, the applicant described this project as a newer, containerized design with multiple layers of mitigation: steel containers, millisecond-level monitoring, remote shutoff, active cooling, and a chemical-agent mist suppression system (not water) intended to reduce temperature and prevent ignition.
San José’s Fire Marshal (Deputy Fire Chief James Dobson) reinforced that the City applies a high bar, describing large-scale fire testing during full thermal runaway to confirm suppression effectiveness and prevent unit-to-unit propagation. He said a fire in an ESS unit can’t be ruled out entirely, but expressed confidence it would be contained to the unit of origin.
The Planning Commission voted 10–0 (one absent) to approve.
Why this matters
- This hearing locks in the City’s public narrative on BESS safety. San José is effectively saying: “fires can happen, but propagation shouldn’t,” and grounding that confidence in large-scale destructive testing and plan review. That’s a meaningful standard for future projects and for any public debate about siting.
- Non-water suppression is now on the record. The applicant specifically described suppression as a chemical mist agent rather than water. That’s a big deal because a lot of community concern (and a lot of responder tactics) defaults to water cooling and long-duration suppression. The real question becomes: what exactly did SJFD require in the final fire protection package and what testing supports it?
- It frames BESS as a compact grid tool, not a generation project. The applicant leaned heavily on the “arbitrage” function: charge when prices are low (often midday solar surplus), discharge during the evening peak (5–9 pm), and compete with gas peakers. Whether you buy that economics argument or not, it’s the core justification being presented for why these facilities belong in industrial areas near load.