Introduction: From Ban to Regulation
Battery energy storage systems (BESS) are no longer judged solely on performance or economics. Safety now determines whether projects move forward at all. Orange County’s new BESS ordinance replaces a temporary ban with a permanent regulatory framework that allows development under strict safety, siting, and permitting requirements.
Orange County’s approach to battery storage changed quickly, and deliberately. What began as an emergency response to safety concerns has evolved into one of the most defined local regulatory frameworks in California.
In January 2025, the County enacted a moratorium on large-scale BESS in unincorporated areas. The decision followed growing concern around lithium-ion battery fires, particularly the high-profile incident at Moss Landing. Local officials needed time to evaluate risks, assess fire response capabilities, and establish enforceable standards.
That process resulted in Ordinance 25-017, adopted in November 2025 and effective December 4, 2025. The moratorium officially expired in early 2026. BESS projects are now allowed again, but only under a significantly stricter regulatory structure.
Orange County moved from prohibition to controlled deployment, with safety at the center of every requirement.
Why the Moratorium Was Enacted and How Policy Evolved
The moratorium was not a reaction to a single event. It reflected a broader concern about how lithium-ion battery systems behave under failure conditions.
The Core Safety Drivers Behind the Moratorium
Thermal runaway remains the core issue. When a single cell fails, heat rapidly spreads to adjacent cells, leading to fire propagation, toxic gas release, and prolonged incidents that are difficult to suppress. Fire departments across California have faced challenges responding to these events, particularly in densely populated or wildfire-prone areas.
Public pressure increased as these risks became more visible. Communities raised concerns about proximity to homes, schools, and critical infrastructure. Local governments responded by pausing development to reassess.
The county needed answers to several key questions:
- How far should systems be from occupied buildings?
- Can BESS safely operate in wildfire-prone regions?
- What level of emergency planning is required?
- How should projects be reviewed and approved?
The moratorium created the time needed to turn these questions into enforceable policy.
Timeline of Policy Changes
The transition from moratorium to ordinance followed a structured timeline:
- January 2025: Emergency moratorium enacted
- March 11, 2025: Extension approved for 10 months and 15 days
- November 4, 2025: Ordinance 25-017 adopted
- December 4, 2025: Ordinance takes effect
- January 26, 2026: Moratorium expires
During this period, Orange County replaced uncertainty with clearly defined development standards. Developers now know what is required, and the bar is higher.
Inside Ordinance 25-017: New Development Standards
The ordinance introduces multiple layers of safety, zoning, and permitting requirements. Each one directly addresses a known risk associated with battery storage, and each one reshapes how projects are planned and executed.
100-Foot Setback Requirements
New BESS facilities must maintain a minimum 100-foot distance from residential and community structures.
This exceeds the California Fire Code baseline of 10 feet by a wide margin. The intent is to create a buffer that limits exposure in the event of a fire or thermal event.
For developers, this requirement immediately constrains site selection. Many previously viable locations no longer qualify. Projects must now be designed around available land that can meet these spacing requirements, which becomes increasingly difficult in dense or mixed-use areas.
Wildfire Zone Restrictions
The ordinance prohibits BESS installations in Very High Fire Hazard Severity Zones.
This aligns with California’s broader wildfire risk mitigation strategy. Battery systems introduce ignition concerns, and the County has chosen to eliminate that risk through zoning restrictions.
This further reduces viable development areas. Site selection becomes more complex, requiring early-stage analysis of fire hazard maps and land use compatibility before a project can even be considered feasible.
Mandatory Use Permits
All large-scale BESS projects must now obtain a Use Permit through the Planning Commission.
This process includes public hearings, introducing direct community involvement in project approval. Developers must present projects in a way that addresses safety concerns clearly and convincingly.
Permitting timelines will extend as documentation requirements increase. Developers must invest more time upfront, coordinating across planning teams, engineers, and stakeholders to secure approval.
OCFA Fire Safety Oversight
The Orange County Fire Authority (OCFA) plays a central role in the new framework.
Developers must coordinate directly with OCFA and submit detailed plans that include:
- Emergency response procedures
- Fire mitigation strategies
- Decommissioning plans
This requirement elevates system design to a critical factor in project approval. Fire risk, thermal behavior, and emergency response are no longer secondary considerations. They must be engineered into the system from the beginning.
A New Regulatory Baseline
Taken together, these requirements establish one of the most stringent local BESS frameworks in California.
They also introduce a new level of clarity. While the process is more complex, developers now have a defined path forward. Projects that meet these standards can move through permitting with a clear understanding of expectations.
State vs. Local Authority: The AB 205 Factor
While Orange County has defined strict local rules, state-level authority introduces another pathway.
Under AB 205, the California Energy Commission (CEC) can approve large energy projects over 200 MWh through a streamlined process. This approval can override certain local zoning restrictions.
This creates a dual-track system:
- Local permitting through Orange County, with strict requirements
- State-level approval through the CEC, with potential preemption of local rules
Developers must evaluate both options. Local approval may offer smoother community alignment, while state approval may accelerate timelines for larger projects.
The tension between local control and statewide decarbonization goals remains unresolved. California needs large-scale storage to meet its 2045 targets, but local jurisdictions are enforcing stricter safety expectations.
The Critical Role of Safety Technology in Meeting Compliance
Traditional lithium-ion systems struggle under frameworks like this. They rely on spacing, ventilation, and suppression systems to manage risk, but they do not eliminate the root cause of fire propagation or toxic gas release.
Thermal runaway remains a central concern for regulators. Once initiated, it spreads rapidly, generates hazardous gases, and becomes difficult to contain.
How LiquidShield Immersion Cooling Eliminates BESS Fire Risk
EticaAG’s LiquidShield immersion technology addresses battery safety at the cell level by fundamentally changing how heat and failure events are managed.
Each battery cell is fully submerged in a non-toxic dielectric fluid. Immersion cooling places the entire energy source in direct contact with a medium designed to absorb and dissipate heat continuously. This prevents localized temperature buildup and keeps cells operating within a stable thermal range.
If a cell experiences an internal failure, the surrounding fluid immediately absorbs and disperses the heat before it can impact neighboring cells. This stops the chain reaction that typically leads to thermal runaway events in traditional systems.
At the same time, the liquid environment isolates each cell from oxygen. Without oxygen, combustion cannot occur. Any potential flame is immediately suppressed at the point of origin, eliminating the conditions required for ignition.
The result is a system where heat does not accumulate, failure does not propagate, and fire cannot sustain itself.
How HazGuard Eliminates Toxic Gas Risk
Fire is only one part of the hazard profile. Lithium-ion failures also release toxic and flammable gases, including hydrogen, carbon monoxide, and hydrogen fluoride.
EticaAG’s HazGuard toxic gas neutralization system manages this risk through a controlled process that captures, treats, and safely releases gases before they can accumulate or spread.
The system operates in four stages:
- Containment: Off-gases are captured at the source within sealed modules.
- Routing: A sealed manifold directs gases through a controlled pathway.
- Neutralization: A physicochemical process converts toxic and flammable gases into inert compounds.
- Safe Release: Neutralized gases are exhausted as inert air outside the enclosure.
This process prevents gas accumulation, eliminates explosion risk, and ensures no hazardous emissions are released into the environment.
Why This Matters for Orange County Compliance
Under a framework like Ordinance 25-017, system design directly affects approval outcomes.
Technologies like LiquidShield and HazGuard support compliance by:
- Eliminating fire propagation through thermal management and oxygen isolation
- Eliminating toxic gas exposure through active neutralization
- Aligning with OCFA expectations for both fire suppression and hazardous gas control
- Supporting safer siting decisions within constrained environments
- Strengthening project positioning during public hearings
When safety concerns drive regulation, technologies that eliminate both ignition and gas hazards become essential.
Conclusion: A New Era of Regulated BESS Deployment
Orange County has established a clear precedent. Battery storage is no longer paused, but it is no longer loosely regulated either.
Projects must now meet higher standards for siting, safety, and community engagement. Developers must design systems that align with both regulatory expectations and public concerns. Public hearings now play a direct role in approval, and safety concerns often shape the outcome. System design influences not only compliance, but also community acceptance, insurance, and financing.
At the same time, the ordinance draws a clear line between system types. Large-scale, utility-level BESS faces increased scrutiny, while residential and small commercial systems continue to expand with fewer constraints. Behind-the-meter storage remains a growing segment, driven by resilience and cost savings.
This shift is not isolated to Orange County. California’s clean energy goals require a rapid expansion of storage, yet local jurisdictions are enforcing stricter safety standards. The balance between deployment speed and safety enforcement is becoming a defining challenge across the state.
Orange County’s BESS ordinance offers a model for how jurisdictions can pause development, assess risk, and reintroduce projects under stricter controls. The path forward is defined. The requirements are stricter. The expectations are higher.
The future of BESS depends on technologies that eliminate fire risk at the source. Systems that control heat, prevent ignition, and manage gas hazards will define which projects move forward and which do not.
