Battery Plant Construction, Safety, and Funding in California
Battery Plant Construction, Safety, and Funding in California
A Comprehensive Analysis: 2015–2026 • Research Report • March 2026
Executive Summary
California has emerged as the undisputed national leader in battery energy storage deployment. Over the past decade, the state has transformed its energy infrastructure through an extraordinary buildout of lithium-ion battery storage systems, growing from approximately 770 megawatts of installed capacity in 2019 to nearly 17,000 megawatts by late 2025—a surge of more than 2,100 percent. This expansion encompasses over 200 utility-scale systems, more than 250,000 commercial and residential installations, and a pipeline of projects pushing toward the state’s 52,000 MW target by 2045.
This growth has not been without challenges. High-profile fire incidents—most notably the January 2025 blaze at the Vistra Energy Moss Landing facility, the largest battery storage plant fire in U.S. history—have raised serious questions about safety standards, community impact, and regulatory oversight. The fire forced the evacuation of 1,500 residents, generated lawsuits involving roughly 1,000 plaintiffs, and catalyzed community opposition to proposed battery plants in at least four California counties.
The funding ecosystem is multi-layered: the federal Inflation Reduction Act’s investment tax credits (30–70 percent for standalone storage), California’s Self-Generation Incentive Program (over $1 billion allocated), private equity and debt financing, and the 45X advanced manufacturing production tax credit for domestic battery production.
Scale of Battery Plant Construction (2015–2026)
The Trajectory of Growth
California became a pioneer when it mandated in 2013 that its investor-owned utilities begin procuring energy storage, kickstarting the modern grid battery market. During the foundation period (2013–2018), early projects were modest, and the state accumulated approximately 770 MW of total capacity.
The acceleration phase (2019–2022) saw capacity double in roughly two years, driven by renewable portfolio standards, declining battery costs (which have fallen 93 percent since 2010), and recognition that storage was essential to manage solar intermittency. The LS Power Gateway Energy Storage Project in San Diego County (250 MW, completed 2020) and the initial phase of Vistra’s Moss Landing facility (300 MW, also 2020) were emblematic of this era.
The explosive expansion phase (2023–2026) has been characterized by unprecedented scale. In 2024 alone, California added 7,000 MW of clean energy capacity—the largest single-year increase in state history. By early 2025, total installed battery storage reached 15,763 MW (13,248 MW utility-scale, 1,829 MW residential, 686 MW commercial). By November 2025, that figure reached 16,942 MW, with another 8,600 MW planned by end of 2027.
California Installed Battery Storage Capacity (MW)
Major Facilities Constructed or Brought Online
| Facility | Location | Capacity | Online | Owner | Notes |
|---|---|---|---|---|---|
| Moss Landing Phase I | Monterey Co. | 300 MW | 2020 | Vistra | Indoor NMC design; site of catastrophic 2025 fire |
| Gateway Energy Storage | San Diego Co. | 250 MW | 2020 | LS Power | Built by McCarthy Building Companies |
| Moss Landing Phase II | Monterey Co. | 400 MW | 2021 | Vistra | Outdoor containerized; total site 750 MW |
| Crimson Storage | Riverside Co. | 350 MW | 2022–23 | Recurrent Energy | BLM desert land; standalone storage |
| Saticoy Battery | Oxnard, Ventura Co. | 100 MW | 2023 | Arevon Energy | Replaced proposed gas peaker plant |
| SDG&E Escondido | Escondido | 160 MW | 2023 | SDG&E | Sep 2024 fire; city adopted BESS moratorium |
| Diablo Storage | Pittsburg, Contra Costa Co. | 300 MW | 2023–24 | Various | Near former gas plant sites |
| Nova Power Bank | Menifee, Riverside Co. | 680 MW | 2024–25 | Calpine | ~$1B; 1,096 containers; BYD LFP cells |
| Edwards Sanborn | Kern County | 2,353 MW | Phased | Terra-Gen | One of world’s largest solar+storage complexes |
Tesla and EV Battery Operations in California
While most of California’s battery buildout involves grid-scale energy storage, the state hosts significant battery development operations. Tesla’s Fremont Factory produces over 650,000 vehicles annually with integrated battery pack assembly. Tesla’s Kato Factory, also in Fremont, serves as its battery research and pilot production facility, pioneering dry electrode technology. Tesla’s large-scale cell manufacturing is concentrated at Gigafactory Nevada (Sparks), producing 37 GWh of cells annually. A new LFP cell factory there, using equipment from CATL, was nearing completion as of mid-2025.
Battery Types Produced and Deployed
Battery Chemistry Market Share in California Grid Storage
Nickel Manganese Cobalt (NMC): Earlier installations, including Moss Landing Phase I (2020), used NMC batteries from LG Energy Solution. High energy density but more prone to thermal instability and thermal runaway. Dominant grid-scale chemistry through approximately 2022.
Lithium Iron Phosphate (LFP): Now the industry standard for new utility-scale storage. Significantly safer, cheaper, and longer-lasting, with lower energy density. The Nova Power Bank uses BYD-manufactured LFP cells. Tesla’s Megapack has shifted to LFP. This dominance mirrors a global trend originating in China’s battery sector.
Nickel Cobalt Aluminum (NCA): Used primarily in Tesla’s long-range EV battery packs (manufactured by Panasonic at Gigafactory Nevada). Highest energy density among common lithium-ion chemistries.
Emerging Technologies
Sodium-ion batteries are under exploration by Tesla and others as a low-cost alternative. Iron-air batteries from Form Energy promise 100+ hour duration storage. Iron flow batteries from ESS Tech offer enhanced safety and are being adopted by some public utilities. None have achieved large-scale commercial deployment in California yet.
Funding Mechanisms and Financial Architecture
Federal Incentives
IRA Investment Tax Credit: Created the first-ever standalone ITC for battery storage at 30 percent—up to 70 percent with bonus incentives for domestic content, energy communities, and prevailing wage compliance. Expected to drive up to $1 trillion in storage investments by the early 2030s. As of early 2026, significant uncertainty exists under the “One Big Beautiful Bill” reconciliation package.
45X Manufacturing Production Tax Credit: Covers 10 percent of production costs for eligible battery components and critical minerals. Has spurred domestic manufacturing announcements nationwide.
BIL Battery Manufacturing Grants: Over $3 billion for 25 projects across 14 states, representing combined federal/private investment exceeding $5.6 billion.
California State Programs
Self-Generation Incentive Program (SGIP): Over $1 billion allocated by CPUC, including $512 million for energy storage. Rebates up to $1,000/kWh (100% cost coverage) for qualifying participants. In 2025, CPUC launched a $280 million initiative for low-income residential solar and battery installations.
CEC Opt-In Certification (AB 205): Streamlined permitting with 270-day environmental review. First used for the Darden Clean Energy Project approval in 2025.
Private Capital and Project Finance
Most large-scale projects use blended equity, debt, and federal tax credits. The Nova Power Bank required approximately $1 billion. The Darden project is expected to be multi-billion dollars (a comparable Intersect Power project was reported at $2.5 billion). Vistra’s Morro Bay proposal was estimated at $500–$600 million. Private equity and infrastructure funds are attracted by long-term PPAs with PG&E, SCE, and SDG&E.
Funding Sources for California Battery Storage Projects
Safety Record and Fire Incidents
Overview of the Safety Landscape
Lithium-ion battery fires result from thermal runaway—uncontrolled heating producing flammable gases. These fires are notoriously difficult to extinguish; water is often ineffective and fires can reignite after suppression. According to the EPRI BESS Failure Incident Database, the global failure rate dropped 98 percent from 2018 to 2024 as design lessons were incorporated. However, this improvement has been overshadowed in California by high-profile incidents.
Documented Fire and Safety Incidents at California Facilities
| Date | Facility | Severity | Details |
|---|---|---|---|
| 2021 | Moss Landing (Vistra) | Moderate | Fire caused by sprinkler system malfunction resulting in overheating of battery units. Contained without evacuation. |
| 2022 | Moss Landing (Vistra) | Moderate | Multiple battery melting events; suppression system activated and prevented full fire. |
| May 2024 | San Diego County (SDG&E) | Significant | Fire at SDG&E facility burned for more than one week, prompting evacuations. |
| Sep 2024 | Escondido (SDG&E) | Low | Fire contained to one of 24 storage containers. No injuries. |
| Jan 16, 2025 | Moss Landing (Vistra) | Catastrophic | Largest U.S. battery fire. Destroyed 75%+ of 300 MW Phase I (~100,000 NMC modules). 1,500 evacuated; Hwy 1 closed; fire burned for days. |
| Feb 18, 2025 | Moss Landing (Vistra) | Moderate | Reignition during hazmat cleanup of burned Phase I site. |
California regulators have cited at least eight additional overheating/fire incidents at battery plants over a 3.5-year period. This pattern has been characterized as systemic rather than isolated.
The Moss Landing Fire: A Watershed Event
The January 2025 fire is the defining safety event for California’s battery industry. The Phase I facility used NMC batteries from LG Energy Solution housed inside an enclosed building—a design now widely criticized as outdated compared to containerized outdoor systems. It was the fourth safety incident at the site since 2021, and the fire suppression system failed to contain the blaze.
Multiple lawsuits involving approximately 1,000 plaintiffs (represented by Singleton Schreiber with Erin Brockovich, Cotchett Pitre & McCarthy, and Danko Meredith) allege Vistra, PG&E, and LG Energy Solution failed to implement adequate safety measures despite prior incidents. Cleanup remained ongoing as of January 2026.
Environmental and Community Impacts
Short-Term Environmental Impacts
Air Quality: Battery fires release toxic gases (hydrogen fluoride) and particulate matter with heavy metals. At Moss Landing, EPA monitoring found hydrogen fluoride within California standards, but thick smoke and ash spread for miles beyond the evacuation zone.
Soil and Water Contamination: Testing around Moss Landing detected elevated cobalt, nickel, copper, and manganese in soil. Metals detected in local drinking water at levels officials deemed safe. UC Santa Cruz environmental toxicologists argued testing was insufficient, noting deeper soil samples may have diluted surface contamination.
Health Impacts: 49 people reported symptoms to Monterey County Health Department. Thousands discussed respiratory difficulties, elevated heart rates, rashes, headaches, and metallic tastes in community forums. County epidemiological data showed no significant change in ED visits from baseline.
Long-Term Environmental Considerations
Land Use: Projects occupy significant acreage (Nova: 43 acres; Darden: 9,500 acres including solar). Many are sited on former industrial land or non-arable agricultural land, viewed positively as brownfield redevelopment.
Lifecycle and Waste: Burnt lithium-ion batteries present specialized waste challenges. Recycling infrastructure is developing, supported by BIL grants. The shift toward LFP and sodium-ion reflects concerns about the environmental footprint of cobalt and nickel mining.
Ecosystem Proximity: Moss Landing is adjacent to Elkhorn Slough Reserve, one of California’s most important estuarine habitats (closed for nearly a week post-fire). The Compass project near San Juan Capistrano raised concerns about the San Juan Creek Watershed.
Community Opposition
The Moss Landing fire catalyzed community opposition across California, with residents in at least four counties actively opposing new plants. The backlash extends nationally to communities in Massachusetts, New York, and Ontario, Canada.
Moratoriums and Restrictions: Solano County enacted a two-year moratorium (Jan 2024). Escondido approved an interim ordinance (Oct 2024). Moorpark imposed full enclosure requirements. Kern County is imposing large setbacks. Los Angeles County is developing new zoning standards.
Active Community Campaigns: In Morro Bay, Citizens for Estero Bay Preservation placed ballot Measure A-24 requiring voter approval. In Orange County, opposition to the proposed Compass project drew a seven-hour public comment period and opposition from the Mayor of Laguna Niguel, County Supervisor Katrina Foley, and Congressman Mike Levin. Near Escondido, residents gathered 2,500 signatures against the Seguro plant.
Key Concerns: Fire risk (especially in High Fire Severity Zones), property values, insurance coverage, tourism impacts, noise from cooling systems, proximity to schools/homes/hospitals, water contamination risk, and loss of local control through state-level permitting.
Regulatory Response
In March 2025, the CPUC required new safety protocols including mandatory incident reporting and consultation with local authorities—requirements that had not previously existed. Governor Newsom signed SB 283, requiring developers to engage with local fire authorities on facility design and emergency plans. California updated its Fire Code for stationary lithium-ion systems.
Assemblymember Dawn Addis introduced AB 303 (Battery Energy Safety & Accountability Act) to require local engagement in permitting and environmental setbacks from sensitive areas. The NFPA has developed voluntary battery-specific standards. The American Clean Power Association urges communities to require compliance with the latest NFPA standards.
New Battery Plants Under Construction or in Planning
Under Construction or Recently Approved
| Project | Location | Capacity | Timeline | Notes |
|---|---|---|---|---|
| Darden Clean Energy | Fresno Co. | 1,150 MW / 4,600 MWh | Late 2025–2028 | World’s largest once complete. 9,500 acres; paired with 1.15 GW solar. Intersect Power. 2,000+ jobs; $169M community benefits. First CEC Opt-In approval. |
| Nova Phase 2–3 | Menifee | Up to 2,000 MW | 2025 | Calpine’s full buildout. ~2,000 MW total battery capacity under development. |
| Buttonbush Solar+Storage | Kern Co. | Up to 2 GW + 2 GW solar | Planning | Avantus-developed. Would be one of the largest solar+storage in the U.S. |
| Perkins Renewable | East of El Centro | 1.1 GW | CEC review | Intersect Power; ~$2.5B; private and federal land. |
Proposed Projects Facing Community Opposition
| Project | Location | Capacity | Status & Opposition |
|---|---|---|---|
| Compass Energy Storage | San Juan Capistrano | 250 MW | CEC application complete Apr 2025. Decision expected Jan 2026. Strong opposition from multiple cities and elected officials. Wildfire risk, I-5 proximity, watershed concerns. |
| Morro Bay Battery | Morro Bay | 600 MW | Vistra proposal; $500–$600M. In DEIR stage. Ballot Measure A-24 may require voter approval. Tourism and fire concerns. |
| Seguro Battery Plant | Near Escondido | TBD | AES project. 2,500-signature opposition petition. High Fire Severity Zone. Draft EIR pending. |
Orange County is crafting a BESS ordinance to ban development inside Very High/High Fire Zones as identified by CalFire. Additional resistance is emerging in Alameda and Los Angeles Counties.
Design Evolution and Safety Improvements
The industry has moved from enclosed indoor building designs (as at Moss Landing Phase I) to containerized outdoor systems where batteries are housed in separate shipping-container-sized enclosures. This isolates potential incidents to prevent cascading failures. Features include fireproof panels between packs, deflagration panels, thermal infrared cameras, 24/7 monitored heat/smoke sensors per container, and dedicated suppression systems per unit.
The shift from NMC to LFP chemistry represents a fundamental safety improvement due to greater thermal stability. New projects like Darden incorporate these containerized designs along with comprehensive emergency response plans developed in consultation with local fire authorities.
Outlook and Key Takeaways
California trails only China globally in installed battery storage and has demonstrated that a clean grid can be reliable—achieving 100 percent clean energy for portions of the day on 91 percent of days in the first five months of 2025. However, unresolved tensions persist between rapid deployment and community safety, state climate mandates and local control, and the benefits of storage and the risks demonstrated by Moss Landing.
Key factors shaping the next decade include the fate of IRA tax credits; effectiveness of new safety regulations (SB 283, CPUC protocols, updated Fire Code); whether LFP chemistry and containerized designs reduce incident rates; the outcome of Moss Landing litigation; community opposition dynamics; and emergence of inherently safer technologies (iron-air, iron flow, sodium-ion).
California’s 52,000 MW storage target for 2045 remains extraordinarily ambitious. Achieving it requires not just technology and capital, but sustained public trust—trust that has been significantly damaged but is not beyond repair.
Sources & References
- California Energy Commission — Energy Storage System Survey, installation statistics
- California Governor’s Office — Battery storage deployment statements
- California Public Utilities Commission (CPUC) — SGIP program, safety protocols
- EPRI BESS Failure Incident Database — Global failure rate data
- NPR — Moss Landing fire coverage
- MIT Technology Review — Battery safety analysis
- Reuters — CPUC regulatory response
- Canary Media — Battery industry evolution
- Engineering News-Record — Moss Landing incident details
- U.S. Department of Energy — BIL grants, battery manufacturing
- U.S. Treasury Department — IRA tax credit guidance, 45X rules
- American Public Power Association — IRA storage provisions
- pv magazine USA — SGIP low-income initiative
- Voice of OC — Compass Energy opposition coverage
- Local News Matters — Moss Landing lawsuit filings
Research conducted March 2026.