In 2025, the UK Parliament halted EV charging in its own covered car parks after assessing the fire risk profile a decision that prompted widespread discussion about safe EV charger installation in confined areas. If Parliament paused operations over EV fire risk, UK commercial property owners, fleet operators, and facilities managers have no rational basis for complacency.
The challenge is not simply that EV battery fires are dangerous. The challenge is that the market for EV fire protection solutions is expanding rapidly, and commercial decision-makers are being asked to compare products that operate on fundamentally different principles, suit fundamentally different environments, and deliver fundamentally different outcomes.
A suppression system that is perfectly suited to an enclosed underground car park may be entirely wrong for an open-air fleet depot. A deployable device designed for emergency responders may not provide the automatic, unattended activation that a commercial charging facility requires overnight. Choosing based on price alone, or selecting the first product a general fire contractor recommends, carries real risk both operationally and from an insurance and compliance standpoint.
This article provides a clear, objective comparison of the primary EV fire protection solutions available to UK commercial sites in 2026. It covers how each system works, what environments it is designed for, its strengths and limitations, and how to determine which solution or combination of solutions is right for your site.
Fire and Safety UK supplies the Turtle Fire System, EV FirePro, and Trident synthetic foam. Our recommendations are always driven by a site-specific EV fire risk assessment, not by product availability.
Why Conventional Fire Suppression Fails Against Lithium Battery Fires
Before comparing specialist EV solutions, it is essential to understand why standard commercial fire protection systems are broadly inadequate for EV battery incidents.
The Battery Pack Is Under the Vehicle Not Accessible From Above
Conventional overhead sprinkler systems deliver water from the ceiling downward. EV battery packs are mounted beneath the vehicle floor. Traditional ceiling-mounted systems are not designed to target the undercarriage, where EV battery fires originate. The water sprayed by an overhead system hits the vehicle roof and sides it does not reach the battery cells generating the thermal event.
Thermal Runaway Cannot Be Interrupted by Surface Suppression
A single defective cell, or one subjected to mechanical, electrical, or thermal abuse, may trigger an increase in internal temperature, leading to thermal runaway. The resulting fire develops within minutes and can propagate to neighbouring cells if not suppressed on time. In advanced thermal propagation, the battery generates its own heat, making it difficult to cool down fast enough.
Dry powder extinguishers suppress surface flames temporarily. They do not cool the battery cells below the thermal runaway threshold. A fire that appears extinguished by powder will reignite from within the pack sometimes hours after the initial incident. This is not a theoretical risk; it is a documented operational reality that has caught building managers and emergency services off guard across the UK.
Reignition Creates a Secondary Risk Conventional Systems Cannot Address
Lithium-ion batteries have become one of the most significant fire risks in UK businesses. As businesses install EV charging points to meet sustainability goals, they are inadvertently creating new fire risks that existing safety systems were not designed to handle.
The reignition window for a lithium battery fire can extend 24 to 72 hours after apparent suppression. Standard fire safety plans have no mechanism for managing this window. Specialist EV suppression systems are designed around it.
The Four Primary EV Fire Protection Solutions for UK Commercial Sites
The following sections compare the four principal categories of EV fire protection available to UK commercial sites in 2026: the Turtle Fire System, EV FirePro, Trident synthetic foam concentrate, and conventional water suppression retrofitted for EV use. Each is evaluated against the same criteria.
Solution 1: The Turtle Fire System
What It Is
The Turtle Fire System is a low-profile, deployable suppression device designed to be pushed under a burning vehicle to deliver direct, high-volume water cooling to the battery pack from below.
The Turtle Fire System delivers 500 or more gallons per minute directly onto the battery case. Its unique design allows it to operate safely and effectively under a burning vehicle while delivering water directly onto the battery case. Once deployed, it operates unmanned, reducing exposure to fire and harmful toxic gases. Its low-profile design is easily deployed under a vehicle.
The Turtle Fire System was engineered to operate safely, reliably, and effectively under a burning vehicle, and enables departments to repurpose manpower and do more with less.
How It Works for Commercial Sites
The Turtle system is connected to a standard fire hose supply and pushed beneath the burning vehicle using a 5-foot handle keeping the operator away from the toxic vapour cloud generated by the battery event. Once in position, it delivers sustained, targeted cooling to the battery cells at the source of the fire. This directly addresses the fundamental limitation of overhead suppression: water reaches the pack, not the roof.
Strengths
- No fixed installation required can be deployed to any location on site without prior infrastructure
- Portable and versatile suitable for mixed fleets where not all vehicles are EVs
- Unmanned operation once deployed reduces personnel exposure to toxic gas and heat
- Effective for large-format batteries designed for the energy scale of commercial EVs, not just passenger cars
- Rapid deployment assembled and operational in minutes with minimal training
Limitations
- Requires human deployment not suitable as a fully automated, unattended overnight system
- Requires an adequate water supply connection at or near the vehicle
- Best suited to open or semi-open environments; may require modified deployment protocol in very low-clearance underground car parks
Best Suited For
Fleet depots, logistics and haulage operators, emergency services and security-staffed sites, commercial sites with mixed EV and ICE fleets, any environment where a human response within the initial minutes of a fire is reliable.
Solution 2: EV FirePro Fixed Bay-Level Suppression
What It Is
EV FirePro is a permanently installed, floor-mounted fire suppression system built into individual EV parking bays. It activates automatically when thermal event conditions are detected, delivering targeted water spray upward to the vehicle undercarriage and laterally to adjacent bays.
EV FirePro is a fixed fire suppression system installed into a car parking bay. In an EV fire event, it sprays water to the vehicle undercarriage to control heat release. Additionally, EV FirePro provides water spray coverage to adjacent vehicles and structural building elements to reduce fire spread and assist in preventing fire damage.
EV FirePro has been recognised by fire safety experts as an ‘upside-down sprinkler from below’. It delivers targeted vertical and lateral water spray, suppressing flames, reducing heat spread, and providing safer conditions for emergency responders. It is not intended to extinguish an EV fire entirely, but to reduce its effects: limiting spread, protecting adjacent vehicles, dissipating heat, and creating safer conditions for firefighter intervention.
How It Works for Commercial Sites
EV FirePro is installed at bay level during construction or as a retrofit. Each unit is connected to the site’s water supply and integrated with the fire detection system. When a thermal event is detected, the system activates automatically no human intervention is required. This makes it the primary solution for sites where unattended overnight charging is the standard operating model.
EV FirePro has undergone independent full-scale fire testing at Applus+ Laboratories in Spain using performance-based fire testing protocols developed specifically for EV parking environments. Testing evaluated fire spread behaviour, adjacent vehicle exposure, heat conditions, and operational response during a simulated EV battery thermal runaway event within an enclosed car park environment.
Strengths
- Fully automatic activation operates without human presence or intervention
- Bay-specific targeting water reaches the undercarriage directly, not through the vehicle
- Lateral protection adjacent bay spray reduces vehicle-to-vehicle propagation
- Independent fire test verified performance validated under simulated EV fire conditions
- Permanent installation always in position, always ready, no deployment requirement
Limitations
- Requires installation into the bay structure upfront installation cost and lead time
- Fixed to specific bays not suitable for environments where EV parking locations change frequently
- Retrofit in existing multi-storey car parks requires structural assessment prior to installation
Best Suited For
Enclosed and underground commercial car parks, new-build commercial developments with EV charging provision, retail parks, hotels, airports, high-rise mixed-use buildings, and any site where unattended overnight charging is a core operational feature.
Solution 3: Trident Synthetic Fire Foam Concentrate
What It Is
Trident is a next-generation, PFAS-free synthetic fire foam concentrate formulated specifically for lithium battery and EV fire environments. It is applied via standard foam application equipment and is designed as a direct replacement for Aqueous Film Forming Foam (AFFF), which is being withdrawn from commercial use across the UK due to environmental regulation.
Why AFFF Is No Longer Acceptable
Aqueous Film Forming Foam has been the industry standard fire foam for decades. However, AFFF contains PFAS per- and polyfluoroalkyl substances which are persistent environmental contaminants. The UK Environment Agency and SEPA (Scottish Environment Protection Agency) have both tightened controls on PFAS discharge, and the regulatory direction of travel is toward a full prohibition on PFAS-containing foam in commercial fire safety applications. Businesses that continue using AFFF face both environmental liability and increasing insurer scrutiny.
How Trident Works for EV Fire Environments
Trident delivers the cooling, knockdown, and reignition suppression performance required for lithium battery fire response without PFAS compounds. It encapsulates flammable gases generated during thermal runaway, cools the battery surface, and forms a barrier that resists reignition addressing the multi-hour reignition window that is the characteristic post-event risk of EV battery fires.
Strengths
- PFAS-free compliant with current and anticipated UK environmental regulations
- Compatible with existing foam infrastructure no system replacement required where foam application is already part of the site fire plan
- Effective against thermal runaway gas encapsulates flammable and toxic off-gases
- Reignition inhibition barrier performance addresses the extended reignition window of lithium fires
- Environmentally aligned biodegradable formulation reduces remediation burden following deployment
Limitations
- Foam application is not automatic requires trained personnel or foam monitor activation
- Most effective as part of a broader suppression strategy, not as a standalone first-response solution
- Requires foam application equipment to be maintained, tested, and positioned correctly
Best Suited For
Sites with existing foam suppression infrastructure seeking AFFF replacement, logistics and manufacturing sites where foam application is integrated into the incident response plan, sites subject to SEPA or Environment Agency conditions regarding foam discharge, and commercial sites where foam is used as a secondary suppression layer alongside fixed or deployable EV systems.
Solution 4: Conventional Water Suppression and Why It Is Insufficient Alone
For completeness, it is important to address the role of conventional overhead sprinkler systems in EV fire protection. These systems remain a legal requirement and an important part of commercial fire safety infrastructure. They are not, however, sufficient as the sole protection against EV battery fires on commercial sites.
Traditional ceiling-mounted systems are not designed to target the undercarriage, where EV battery fires originate. Overhead sprinklers can play a role in limiting structural fire spread and protecting non-EV assets during an incident, but they cannot deliver the cooling performance required to interrupt a thermal runaway event at the battery cell level.
The appropriate position for conventional water suppression in an EV fire protection strategy is as a complementary layer part of the broader site fire safety infrastructure not as the primary EV suppression mechanism.
Head-to-Head Comparison: EV Fire Protection Solutions for Commercial Sites
| Comparison Factor | Turtle Fire System | EV FirePro | Trident Foam | Conventional Sprinkler |
| Battery undercarriage access | Yes direct targeting | Yes upward spray from bay floor | Partial surface application | No overhead only |
| Automatic activation | No requires deployment | Yes fully automatic | No requires personnel | Yes heat/smoke activation |
| Fixed installation required | No fully portable | Yes bay-level installation | No equipment-based | Yes overhead pipework |
| Thermal runaway suppression | High sustained high-volume cooling | High targeted at source | Moderate surface and gas encapsulation | Low cannot reach battery cells |
| Reignition prevention | High continuous cooling while deployed | Moderate sustained bay-level supply | High encapsulation barrier | Low no sustained cooling |
| Adjacent vehicle protection | Moderate containment focus | High lateral spray included | Moderate foam spread | Moderate ceiling coverage |
| Suitability for unmanned overnight use | Low requires deployment | High automated activation | Low requires personnel | Moderate activates on heat/smoke |
| Retrofit capability | Excellent no fixed installation | Good floor-mount retrofit possible | Excellent uses existing infrastructure | Existing systems only |
| PFAS compliance | N/A (water only) | N/A (water only) | Yes PFAS-free formulation | N/A (water only) |
| Best environment | Fleet depots, emergency response | Enclosed/underground car parks | Foam-equipped sites, AFFF replacement | Structural fire protection (all sites) |
| Insurer acceptance | High | High | High | Required but insufficient alone |
Which EV Fire Protection Solution Does Your Commercial Site Need?
The answer to this question is always site-specific. However, the following guidance covers the most common commercial scenarios.
Commercial Car Parks (Multi-Storey and Underground)
Current government guidance stresses that enclosed car parks require careful placement of chargers, attention to ventilation, and consideration of how heat and smoke may accumulate during an incident. For these environments, EV FirePro is the primary recommendation automatic, bay-specific, and tested for enclosed car park conditions. Conventional sprinklers remain a requirement for structural protection but must be supplemented with EV-specific bay-level suppression.
Where retrofit installation is not feasible in the short term, a Turtle Fire System staged at a staffed control point provides deployable interim protection while a fixed installation programme is developed.
Logistics and Fleet Depots
For fleet depot environments, the combination of the Turtle Fire System for deployable incident response and EV FirePro for dedicated charging bay protection represents the most robust layered approach. Where the depot fire plan includes foam application, Trident replaces AFFF as the compliant, high-performance alternative. Our dedicated guide to EV fire safety for logistics and haulage operators covers this environment in detail.
Retail Parks and Customer-Facing EV Charging
For retail and leisure sites with customer EV charging, EV FirePro bay-level suppression in designated charging bays provides automatic protection during the high-risk window when vehicles are unattended during charging. This is particularly important for sites where charging bays are enclosed, adjacent to buildings, or positioned in areas with limited ventilation.
Battery Storage Facilities
Commercial battery energy storage systems (BESS) present a distinct risk profile from vehicle-based EV fires. As of January 2025, there are at least 909 battery storage facilities operational, granted planning permission, or under construction in the UK. For BESS environments, fixed suppression systems including EV FirePro and specialist gas-based suppression are appropriate. Our EV fire specialists team can advise on BESS-specific solutions. The Energy Saving Trust provides useful context on BESS fire risk and safety development.
Scotland-Based Commercial Sites
For businesses operating in Scotland, our dedicated guide to EV fire safety consultancy in Scotland covers the regulatory context under the Fire (Scotland) Act 2005 and how each of these systems applies within a Scottish commercial environment.
The Role of a Specialist EV Fire Risk Assessment
No suppression system comparison including this one can replace a site-specific EV fire risk assessment. The right solution for your site depends on factors that cannot be assessed remotely: building structure, ventilation, vehicle separation distances, charging configuration, electrical infrastructure, occupancy patterns, and existing fire protection provision.
Fire and Safety UK conducts specialist EV fire risk assessments for commercial sites of all types and sizes across the United Kingdom. Our assessors evaluate your site against the full range of EV fire risk factors and produce a written report that identifies the most appropriate suppression solution whether that is a single system or a layered combination.
The assessment also provides the documented evidence that commercial insurers are increasingly requiring before confirming policy terms for sites with EV charging infrastructure. Businesses are discovering post-incident that their insurance may be compromised due to inadequate fire safety measures. A specialist assessment closes that gap before an incident occurs.
For businesses that have already installed EV charging without commissioning a specialist assessment, the assessment also identifies any compliance gaps and provides a prioritised remediation plan.
What the Regulatory Framework Requires
Commercial sites with EV charging infrastructure in the UK must satisfy several overlapping regulatory requirements:
The Regulatory Reform (Fire Safety) Order 2005 requires the responsible person to carry out and review a suitable and sufficient fire risk assessment whenever significant changes are made to the premises. EV charging installation is a qualifying material change.
PAS 1899, published by the British Standards Institution, is the primary UK specification for EV charging infrastructure. It defines baseline safety requirements for EV charging installations in commercial environments, including fire risk management obligations.
Building Regulations Part S mandates EV charging provision in new commercial developments and retrofits, with associated fire safety requirements that must be addressed in the design specification.
Insurance policy conditions are increasingly requiring documented EV fire risk assessments and evidence of specialist suppression provision as conditions of commercial property cover. Businesses that cannot demonstrate this documentation face coverage risk.
Frequently Asked Questions
What is the best EV fire protection solution for a commercial car park in the UK?
For enclosed and underground commercial car parks, EV FirePro is the leading fixed bay-level suppression solution. It is installed permanently within each EV parking bay, activates automatically when a thermal event is detected, and delivers targeted water spray to the vehicle undercarriage where the battery pack is located while also protecting adjacent bays. For sites that require a deployable rather than fixed solution, the Turtle Fire System is a highly effective alternative.
Will a traditional sprinkler system protect my commercial site from an EV battery fire?
No. Conventional overhead sprinkler systems were not designed for lithium-ion battery fires and are broadly ineffective against them. Standard sprinklers deliver water from above, but EV battery packs are located beneath the vehicle floor. EV battery fires also require sustained high-volume cooling at cell level to prevent reignition a function that overhead systems cannot reliably deliver. Specialist EV suppression is required alongside, not instead of, standard fire protection.
What is the difference between the Turtle Fire System and EV FirePro?
The Turtle Fire System is a deployable suppression device pushed under a burning vehicle to deliver direct, sustained water cooling to the battery pack. It is portable, requires no fixed installation, and is suited to fleet depots, emergency response, and sites where flexibility is required. EV FirePro is a permanently installed, bay-level fixed suppression system built into individual parking bays. It activates automatically on thermal event detection and is ideal for enclosed car parks, new-build commercial developments, and high-throughput charging facilities.
Why is Trident foam recommended over AFFF for EV fires?
Aqueous Film Forming Foam is being phased out across the UK due to the presence of PFAS compounds, which are persistent environmental contaminants regulated by the Environment Agency and SEPA. Trident synthetic foam concentrate delivers equivalent or superior suppression performance for lithium battery fires without PFAS, making it compliant with current and anticipated UK environmental regulations.
Do I need more than one type of EV fire protection solution on my site?
For most commercial sites, a layered approach is recommended. A logistics depot, for example, may benefit from EV FirePro in dedicated charging bays, the Turtle Fire System for deployable incident response, and Trident foam as part of the broader site fire plan. The right combination depends on site layout, vehicle type, occupancy patterns, and risk assessment findings. Fire and Safety UK assesses each site individually and recommends solutions accordingly.
Can EV fire protection systems be retrofitted to existing commercial buildings?
Yes. Both the Turtle Fire System and EV FirePro can be deployed or installed in existing commercial buildings without requiring structural modifications. The Turtle system requires no fixed installation. EV FirePro is a floor-mounted system that can be installed into existing parking bays as a retrofit. Trident foam is compatible with existing foam suppression infrastructure.
How does a commercial EV fire risk assessment inform which suppression system I need?
A specialist EV fire risk assessment evaluates your site’s specific risk profile including vehicle types, charging configurations, building structure, occupancy hours, electrical infrastructure, and current suppression provision and matches those factors to the most appropriate suppression solution. Without a proper assessment, there is a significant risk of specifying a system that is technically inadequate, commercially disproportionate, or non-compliant with your insurer’s requirements.
The Right System Is the One That Matches Your Site Not the One That Is Easiest to Sell
EV fire protection is not a commodity purchase. The Turtle Fire System, EV FirePro, and Trident foam are all exceptional products but each was designed for specific environments, specific risk profiles, and specific operational contexts. Deploying the wrong solution not only wastes capital; it leaves your site with fire protection that will not perform when it is needed most.
Fire and Safety UK provides independent, assessment-led EV fire protection consultancy to commercial sites across the United Kingdom. We do not recommend systems we cannot assess, and we do not install solutions without understanding the environment they will operate in.
Contact us today to arrange your site-specific EV fire risk assessment and find out which solution or combination of solutions is right for your commercial site.