A Welsh fire brigade recently confirmed that lithium-ion batteries caused over 100 fires in South Wales alone in the space of two years. UK fire services now attend at least three lithium-ion battery fires every day, and the frequency is rising sharply as battery adoption across Welsh commercial, industrial, and logistics premises accelerates.
The RRFSO the Regulatory Reform (Fire Safety) Order 2005, which governs fire safety for all non-domestic premises in England and Wales was recently updated to stipulate that fire risk assessments must now explicitly consider lithium-ion battery risks as part of the responsible person’s legal obligations. That update is not a technicality. It reflects a regulatory recognition that lithium-ion battery storage and charging represents a categorically different fire hazard from the risks that existing assessment frameworks were designed to manage.
For Welsh businesses storing lithium batteries in warehouses, logistics depots, manufacturing facilities, retail environments, or battery energy storage installations the gap between what their current fire risk assessment covers and what it should cover is often significant. That gap carries legal, financial, and human consequence.
Fire and Safety UK provides specialist lithium battery fire risk management to commercial businesses across Wales and the whole of the United Kingdom. This guide covers what Welsh businesses need to know about their legal obligations, the specific fire risks of lithium battery storage, the suppression systems that provide genuine protection, and how to commission the assessment and protection programme that their premises actually requires.
The Specific Fire Risks of Lithium Battery Storage in Welsh Commercial Premises
Thermal Runaway: Why Standard Fire Approaches Fail
Lithium-ion batteries store large amounts of energy in compact spaces. When damaged, overheated, overcharged, or improperly handled, they can enter a process known as thermal runaway a self-sustaining electrochemical chain reaction in which internal temperature rises far beyond the system’s ability to cool itself.
Thermal runaway in lithium-ion batteries occurs when temperatures reach their critical threshold, which varies depending on battery chemistry often ranging from around 130°C for NMC cells to up to 250°C for LFP cells. This reaction can cause fires that spread rapidly and release toxic gases including hydrogen fluoride and carbon monoxide. The rapid energy release during thermal runaway can reach temperatures exceeding 1,000°C, making conventional fire suppression challenging and in many cases ineffective.
The fundamental problem for Welsh commercial premises is that thermal runaway generates its own oxygen. It does not need an external air supply to sustain itself. Dry powder extinguishers suppress surface flames but cannot interrupt the internal chemical process. CO2 displaces oxygen but has no effect on a reaction that creates its own. Standard water sprinklers deliver cooling from above, but the battery pack is located beneath the vehicle floor or within a sealed housing that overhead water cannot penetrate effectively.
The most likely causes of thermal runaway in commercial settings include physical or chemical damage, heat exposure, overcharging or over-discharging, and defective manufacturing. For Welsh warehouses and logistics operations where large quantities of battery-powered equipment, vehicles, and product stock are handled daily, each of these trigger mechanisms is a routine operational feature not an exceptional event.
Reignition: The Risk That Does Not End With the Fire
One of the most dangerous characteristics of lithium battery fires for Welsh commercial premises is the extended reignition risk. A battery fire that appears extinguished can reignite hours or days later, as residual energy within undamaged cells re-triggers the thermal process.
This is not a theoretical concern. In documented UK incidents, lithium battery fires have reignited multiple times over periods extending to 72 hours after initial suppression. For Welsh warehouse and depot operators, this means that post-incident management not just suppression must form a defined component of the fire safety plan. A site that has evacuated, called the fire service, and watched the flames go out has not necessarily resolved the incident.
Our dedicated guide to early detection technologies for lithium battery failure prevention explains how precursor gas monitoring and BMS integration can provide advance warning of both initial and secondary thermal events giving Welsh business operators the intervention window that suppression alone cannot manufacture.
The Range of Lithium Battery Applications in Welsh Commercial Settings
The breadth of lithium-ion battery use across Welsh commercial premises makes this a risk that no sector can reasonably exclude from its fire risk assessment. Current commercial applications in Wales include:
| Commercial Setting | Lithium Battery Applications | Primary Fire Risk |
| Warehouses and distribution | Electric forklifts, pallet jacks, automated guided vehicles, handheld scanners | Charging overnight, battery density, damaged stock |
| Logistics and fleet depots | Electric vans, HGVs, last-mile delivery vehicles | Overnight charging, large-format packs, vehicle density |
| Retail and e-commerce | Battery product stock, e-bikes, e-scooters, returned goods | Stock density, end-of-life battery handling, returns processing |
| Manufacturing | Battery-powered tools, plant and machinery, in-process EV components | Charging areas proximity to combustibles, defective cell exposure |
| Battery energy storage | Grid-scale and commercial BESS installations | Large-format pack thermal cascade, toxic gas volume |
| Commercial property | EV charging for staff and visitors in car parks | Enclosed parking, overnight unattended charging, propagation risk |
| Healthcare | Portable medical equipment, electric mobility devices | Patient environment, evacuation complexity |
In the retail sector alone, the problem is substantial. In 2024, 1.1 billion electrical items containing lithium-ion batteries were discarded in the UK, resulting in over 1,200 fires in bin lorries and waste sites. For Welsh retailers handling lithium battery product returns whether consumer electronics, power tools, or mobility devices the fire risk embedded in returned and end-of-life stock represents a distinct hazard that must form part of the premises fire risk assessment.
Legal Obligations for Welsh Businesses Storing Lithium Batteries
The Regulatory Reform (Fire Safety) Order 2005
The Regulatory Reform (Fire Safety) Order 2005 is the primary fire safety legislation for all non-domestic premises in England and Wales. It places the legal duty for fire safety on the Responsible Person anyone with significant control over the premises, such as a business owner, employer, landlord, or facilities manager.
The RRFSO was recently updated to stipulate that fire risk assessments must now explicitly consider lithium-ion battery risks as part of the responsible person’s legal obligations. This means that a fire risk assessment for any Welsh commercial premise where lithium batteries are stored, charged, or used must specifically evaluate the battery-related hazards not simply treat them as a subset of general electrical risk.
The responsible person must ensure:
- The fire risk assessment is suitable and sufficient for the premises and its actual activities
- All fire hazards are identified and evaluated, including lithium-ion battery storage and charging
- Appropriate fire safety measures are in place and maintained
- The assessment is reviewed whenever significant changes occur to the premises, its use, or the activities carried out
- Records of the assessment and any actions taken are kept and accessible
For Welsh businesses that have added battery storage, EV charging infrastructure, or battery-powered equipment since their last fire risk assessment, the review obligation is triggered immediately. Introducing lithium battery risk to a premises without updating the fire risk assessment is a legal failure not a procedural oversight.
The Welsh Government’s own guidance makes this duty clear. The Gov.Wales fire safety guidance for businesses and workplaces confirms that all businesses in Wales must comply with the RRFSO and carry out a fire risk assessment covering all hazards in their premises.
The Dangerous Substances (Notification and Marking of Sites) Regulations 1990
Where a Welsh business stores 25 tonnes or more of a dangerous substance, the Dangerous Substances (Notification and Marking of Sites) Regulations 1990 require written notification to the local fire and rescue service and the display of appropriate site markings. The applicability of this threshold to lithium battery storage depends on the specific classification and form of the batteries.
For large-scale battery storage operations in Wales including BESS installations, battery recycling facilities, and high-volume battery product warehouses specialist advice should be sought to confirm whether notification obligations apply. Regardless of threshold, proactive engagement with the relevant Welsh fire and rescue service is strongly advisable for any business managing significant lithium battery volumes.
PAS 1899 EV Charging Infrastructure Safety
Where Welsh commercial premises include EV charging infrastructure for staff vehicles, fleet operations, or customer use PAS 1899, published by the British Standards Institution, establishes the baseline fire safety requirements for those installations. PAS 1899 is increasingly referenced by insurers and enforcing authorities as the expected standard for commercial EV charging fire safety management.
The Lithium-Ion Battery Safety Bill
A new Lithium-Ion Battery Safety Bill is currently progressing through the UK Parliament. It introduces actions to stop unsafe or non-compliant products from reaching consumers and introduces new rules to ensure the safe disposal of lithium-ion batteries. While the Bill is still in legislative progress, its direction confirms the regulatory trajectory: lithium-ion battery safety in commercial environments is moving from guidance-based to progressively more prescriptive obligation. Welsh businesses that act now are better positioned than those waiting for formal enforcement to arrive.
Insurance Obligations
Beyond legislative compliance, Welsh commercial insurers are increasingly conditioning coverage on evidence of adequate fire safety measures for premises with significant lithium battery exposure. Businesses that have not updated their fire risk assessment to address lithium battery risk, or that cannot demonstrate appropriate suppression provision, face growing coverage risk. As the number of lithium-ion battery fires in South Wales has risen sharply, insurers operating in the Welsh market are asking increasingly specific questions about battery fire risk management as part of commercial property underwriting.
What a Specialist Lithium Battery Fire Risk Assessment Must Cover
A fire risk assessment for a Welsh business storing lithium batteries is not a standard template with a battery paragraph appended. It is a site-specific technical document that addresses the characteristics of the batteries present, the specific failure modes they introduce, and the adequacy of existing detection and suppression provision against those failure modes.
A suitable and sufficient assessment for Welsh commercial premises with lithium battery storage must address:
Battery type and quantity profiling. The fire risk profile of a premises storing large-format EV battery packs is different from one storing consumer electronic batteries or power tool packs. The assessment must identify what is stored, in what quantities, at what state of charge, and in what configuration.
Storage arrangement and separation. Designated charging areas must be distanced from flammable materials. Battery storage must be evaluated against separation distance guidance for thermal runaway propagation the risk that a single failing cell triggers a cascade through adjacent batteries or combustible stock.
Charging infrastructure and electrical load. Overcharging is one of the primary triggers of thermal runaway. The assessment must evaluate whether charging equipment is appropriate for the batteries being charged, whether electrical infrastructure is adequate for the charging load, and whether management systems are in place to prevent overcharging.
Detection system adequacy. Conventional smoke and heat detectors only react once there is smoke or heat present, which can be after thermal runaway has already begun. Specialist off-gas detection can identify the gases a failing battery releases beforehand, in some cases providing up to 30 minutes of warning. The assessment must evaluate whether the existing detection provision is adequate for the battery risk on site.
Suppression system performance. The assessment must evaluate whether existing suppression systems sprinklers, extinguishers, fixed suppression are designed and positioned to address thermal runaway events specifically. Sprinkler standards do not specifically cover lithium-ion battery storage, and overhead systems cannot reach battery pack interiors. The assessment must identify the gap and specify the appropriate specialist suppression solution.
Emergency procedures and reignition protocol. The fire risk assessment must include emergency procedures that address the specific characteristics of a lithium battery fire evacuation in the presence of toxic gas, liaison with the fire and rescue service, and a defined monitoring protocol for the post-incident reignition window.
Regulatory compliance review. The assessment must confirm compliance against the RRFSO 2005, and where applicable PAS 1899, the Dangerous Substances Regulations, and relevant planning conditions for battery energy storage installations.
Fire and Safety UK conducts all of this through its specialist fire risk assessment service a site-specific engagement that addresses lithium battery risk at the level of technical depth the law and insurance environment now require.
Suppression and Protection Solutions for Welsh Businesses
Fire and Safety UK supplies and installs the three leading commercial lithium battery fire protection systems in the UK. For Welsh commercial premises, the right solution or combination of solutions is determined by the site assessment findings.
The Turtle Fire System
The Turtle Fire System is a deployable vehicle-level suppression device that delivers high-volume water cooling directly to the battery pack from beneath a burning vehicle. It is the primary recommendation for Welsh logistics depots, fleet operators, and warehouses where battery-powered vehicles or plant are charged on site.
The system requires no fixed installation, operates unmanned once deployed, and addresses the fundamental limitation of overhead suppression it reaches the battery pack from below, where the fire originates, rather than from above where water cannot penetrate. For Welsh logistics operators managing electric vans, electric forklifts, or electric HGVs, the Turtle system provides vehicle-level containment that standard warehouse suppression cannot deliver. Full context on the logistics sector risk profile is available in our dedicated guide to EV fire safety for logistics and haulage companies in the UK.
EV FirePro Bay-Level Fixed Suppression
EV FirePro is a permanently installed, floor-mounted suppression system that activates automatically when a thermal event is detected in an individual EV parking or charging bay. It delivers targeted water spray upward to the vehicle undercarriage where the battery is located and laterally to adjacent bays, providing both direct suppression and propagation prevention.
EV FirePro was developed in consultation with fire brigade personnel and independently tested at Applus+ Laboratories in Spain under simulated EV thermal runaway conditions in enclosed parking environments. For Welsh commercial properties retail parks, business parks, warehouses with dedicated EV charging bays, or any enclosed facility it provides automatic, unattended protection during the highest-risk charging window.
Its profile of less than 30mm above the finished floor level allows installation in new-build and retrofit environments without structural modification, making it deployable across the full range of Welsh commercial property types.
Trident Synthetic Fire Foam Concentrate
Trident is a next-generation, PFAS-free synthetic foam concentrate for lithium battery fire environments. As Aqueous Film Forming Foam is progressively withdrawn from UK commercial use due to PFAS environmental regulation, Trident provides a fully compliant, high-performance alternative for Welsh businesses whose fire safety plan includes foam application as part of incident response.
For Welsh sites subject to Natural Resources Wales (NRW) environmental conditions particularly those near watercourses or in ecologically sensitive areas Trident’s PFAS-free formulation addresses both the fire suppression requirement and the environmental discharge obligation simultaneously.
Fire Extinguisher Servicing and Standard Compliance
Alongside specialist lithium battery protection, Fire and Safety UK’s fire extinguisher servicing programme ensures that Welsh businesses maintain their full fire safety equipment inventory to current regulatory standards. All servicing is documented and integrated with the broader fire safety management record, providing a complete compliance audit trail for insurer and enforcement authority purposes.
Sector-Specific Fire Risk Guidance for Welsh Businesses
Welsh Warehouses and Distribution Centres
Welsh warehouse and distribution businesses face concentrated lithium battery risk from multiple simultaneous sources: battery-powered handling equipment, overnight charging of electric delivery vehicles, high-density storage of battery product stock, and increasingly, the management of returned end-of-life batteries. For this environment, the Fire Industry Association’s guidance on lithium-ion battery fire risk in warehouses published by FIA UK provides the technical framework that any credible warehouse fire risk assessment should reference.
The primary fire risk management priorities for Welsh warehouses are: designated battery charging areas separated from combustible stock, specialist off-gas detection for early thermal event warning, suppression provision that reaches the battery pack rather than only the surrounding environment, and documented procedures for managing the post-incident reignition window.
Welsh Manufacturing and Industrial Premises
Manufacturing premises in Wales often use portable hand tools, plant, or machinery powered by lithium-ion batteries. They may also manufacture, maintain, or repair items containing these batteries. Industrial fire protection solutions for these environments must address both the charging risk where overloading and faulty equipment are primary triggers and the storage risk, where battery-powered plant and equipment is concentrated at points of maximum daily use.
For manufacturing premises, the assessment must cover every charging location across the site, not just dedicated charging rooms. Battery-powered hand tools left on charge at workstations, e-pallet movers charged in aisles, and forklift charging stations in shipping areas all represent distinct fire risk points that require evaluation.
Welsh Retail and E-Commerce Operations
Welsh retail businesses face a growing challenge from the management of lithium battery product returns. Returned battery products may be damaged, discharged to unsafe levels, or of unknown condition each of which increases thermal runaway risk during subsequent storage. For retail warehouse environments handling battery product returns, separation of returned stock from operational inventory, inspection protocols for incoming battery products, and suppression provision for high-density storage areas are the primary risk management priorities.
Our guide to comparing EV fire protection solutions for commercial sites covers how the different suppression approaches apply across retail and commercial environments, providing the product comparison context Welsh businesses need when specifying fire protection upgrades.
Welsh Battery Energy Storage Installations
In England and Wales, planning decisions for battery storage systems are handled by local planning authorities regardless of system capacity. For Welsh BESS installations, fire safety obligations extend beyond the RRFSO to include planning conditions, consultation with the relevant local fire and rescue service, and for grid-scale installations compliance with the UK Government’s health and safety guidance for grid-scale electrical energy storage systems.
Our EV fire specialists team has direct advisory capability for BESS environments in Wales, covering the full regulatory and standards framework applicable to commercial battery energy storage.
The Welsh Fire and Rescue Service Landscape
Welsh businesses managing lithium battery fire risk operate within the service areas of three Welsh fire and rescue services. Understanding which service covers your premises and engaging proactively with their guidance is part of responsible fire risk management.
| Welsh Fire and Rescue Service | Coverage Area | Lithium Battery Guidance |
| South Wales Fire and Rescue Service | Cardiff, Swansea, Newport, Bridgend, Rhondda Cynon Taf, Merthyr Tydfil, Vale of Glamorgan, Caerphilly, Blaenau Gwent, Torfaen, Monmouthshire | Confirmed 100+ lithium battery fires in South Wales in last two years |
| Mid and West Wales Fire and Rescue Service | Ceredigion, Carmarthenshire, Pembrokeshire, Powys, Neath Port Talbot, Swansea (shared boundaries) | Provides lithium battery fire safety guidance at mawwfire.gov.uk |
| North Wales Fire and Rescue Service | Anglesey, Gwynedd, Conwy, Denbighshire, Flintshire, Wrexham | Covers major logistics and industrial corridor along A55 and North Wales coast |
For businesses whose premises span multiple Welsh fire and rescue service areas large logistics estates or multi-site retail operations engagement with each relevant service and consistent fire risk documentation across all sites is the appropriate approach.
Regardless of which service covers your Welsh premises, the fundamental fire risk management obligation is the same: a suitable and sufficient fire risk assessment that addresses lithium battery risk specifically, appropriate detection provision for thermal runaway precursor identification, and suppression systems capable of addressing the actual hazard not the generic one a standard assessment assumes.
Building a Compliant Lithium Battery Fire Risk Management Programme in Wales
The following framework represents best practice for Welsh businesses establishing or upgrading their lithium battery fire risk management programme in 2026.
Step 1 Commission a Specialist Lithium Battery Fire Risk Assessment
The starting point for every Welsh business with significant lithium battery exposure is a site-specific specialist fire risk assessment. This is not a document that can be produced by a generalist assessor working from a standard template. It requires specific knowledge of lithium-ion battery fire behaviour, thermal runaway suppression, detection system adequacy, and the applicable regulatory framework for Wales.
Fire and Safety UK conducts specialist fire risk assessments for commercial premises across Wales, producing site-specific written reports that address every element of lithium battery fire risk and provide a prioritised action plan referenced against current legislation and standards.
Step 2 Address Detection Gaps Before Suppression
Early detection is the highest-impact intervention available for Welsh businesses managing lithium battery risk. Conventional smoke and heat detectors only react once there is smoke or heat present, which can be after thermal runaway has already begun. Specialist off-gas detection providing up to 30 minutes of warning before flames are detectable transforms the risk management equation giving operators time to isolate, evacuate, and deploy suppression before the thermal event becomes uncontrollable.
Our guide to early detection technologies for lithium battery failure prevention explains how precursor gas monitoring, BMS integration, and IoT-connected platforms provide the detection layer that suppression alone cannot replace.
Step 3 Specify the Correct Suppression System for Your Site
With the assessment findings in hand, specify the suppression system or combination of systems that addresses your site’s specific risk profile. The Turtle Fire System for vehicle-level deployable suppression, EV FirePro for enclosed bay-level automatic protection, and Trident foam for PFAS-compliant secondary response cover the primary commercial scenarios. Our comprehensive guide to EV fire protection solutions for commercial sites provides the full comparison framework.
Step 4 Update Emergency Procedures for Lithium Battery Events
Review and update your fire emergency procedures to address the specific characteristics of a lithium battery fire: toxic gas evacuation, fire and rescue service notification with vehicle or battery type information, and post-incident reignition monitoring protocol. Staff should be briefed on the difference between a lithium battery fire and a conventional fire including the critical point that an apparently extinguished battery fire must be monitored, not treated as resolved.
Step 5 Establish an Ongoing Compliance and Review Programme
Fire risk management is not a one-time exercise. The regulatory environment around lithium battery safety in Wales is evolving the RRFSO has already been updated, the Lithium-Ion Battery Safety Bill is in Parliament, and insurer expectations are tightening year on year. An ongoing compliance programme that reviews the fire risk assessment when material changes occur, maintains suppression system servicing records, and monitors relevant regulatory developments is the appropriate long-term framework for Welsh businesses managing this risk.
Why Welsh Businesses Choose Fire and Safety UK
Fire and Safety UK provides EV and lithium battery fire safety services to commercial businesses across Wales as part of its national UK service delivery. The company brings the combination of capabilities that Welsh businesses need but the local generalist market cannot provide.
A genuine specialist product portfolio the Turtle Fire System, EV FirePro, and Trident foam that addresses lithium battery fire risk at the level of sophistication the hazard demands. A site-specific assessment methodology that produces technically credible, legally defensible documentation. Knowledge of the Welsh regulatory landscape, including the RRFSO, PAS 1899, and the planning framework that applies to BESS installations in Wales. And national coverage that serves Welsh businesses across Cardiff, Swansea, Newport, Wrexham, and every other commercial centre in Wales.
The business case for specialist engagement is straightforward. Failing to address emerging risks such as battery fires can lead to legal consequences, reputational damage, and serious harm to staff or property. The cost of a specialist fire risk assessment and appropriate suppression system installation is a fraction of the cost of a fire event, an insurance claim, or an enforcement action.
Fire and Safety UK is ready to support Welsh businesses across every stage of their lithium battery fire risk management programme. Contact us to arrange a site assessment and find out what your premises actually needs.
Email: support@fasukfiregroup.co.uk Phone: 01383 601007 National Coverage: England, Scotland, Wales, and Northern Ireland
Frequently Asked Questions
What fire safety regulations apply to businesses storing lithium batteries in Wales?
Welsh businesses are governed by the Regulatory Reform (Fire Safety) Order 2005, which now explicitly requires fire risk assessments to address lithium-ion battery risks. Where storage exceeds 25 tonnes of dangerous substance, the Dangerous Substances (Notification and Marking of Sites) Regulations 1990 may also require notification of the local fire and rescue service.
Why are lithium battery fires more dangerous than conventional fires for Welsh businesses?
Thermal runaway generates its own heat and oxygen, reaching temperatures exceeding 1,000°C. It cannot be interrupted by standard dry powder or CO2 suppression. A Welsh fire brigade confirmed over 100 fires in South Wales from lithium batteries in two years a figure that reflects the scale of the active risk in the region.
What is a suitable fire risk assessment for lithium battery storage in a Welsh warehouse?
A suitable assessment must address battery type and quantity, storage configuration, charging infrastructure, detection system adequacy including off-gas precursor detection, suppression system performance against thermal runaway, reignition protocol, and compliance against the RRFSO 2005 and PAS 1899 where EV charging is present.
Which suppression systems are recommended for lithium battery storage in Welsh commercial premises?
The Turtle Fire System for vehicle-level deployable suppression, EV FirePro for enclosed bay-level automatic protection, and Trident synthetic foam as a PFAS-compliant AFFF replacement. Specialist off-gas detection is recommended for all enclosed battery storage environments.
Do Welsh businesses need to notify the fire and rescue service about lithium battery storage?
Businesses storing 25 tonnes or more of a dangerous substance must notify their local fire and rescue service under the Dangerous Substances Regulations 1990. The applicability to lithium batteries depends on classification. Specialist advice should be sought for high-volume storage operations. Proactive engagement with the relevant Welsh fire and rescue service is strongly advisable regardless of threshold.
What are the most common causes of lithium battery fires in Welsh commercial premises?
Physical damage during handling, overcharging due to faulty equipment, extreme temperature exposure, manufacturing defects, electrical fault conditions in charging infrastructure, and storage of end-of-life or damaged batteries alongside operational stock.
Does Fire and Safety UK provide lithium battery fire risk management across Wales?
Yes. Fire and Safety UK provides specialist services across Wales including Cardiff, Swansea, Newport, and Wrexham, covering fire risk assessments, suppression system installation, and ongoing compliance support.
Welsh Businesses Cannot Treat Lithium Battery Fire Risk as Business as Usual
The fire risk profile of Welsh commercial premises changed when lithium batteries entered their operations. It changed again when EV charging was added to the car park. It changed again when battery stock density in the warehouse increased. And it will change again when the Lithium-Ion Battery Safety Bill becomes law.
Every one of those changes triggers a review obligation under the RRFSO. Every one of them exposes a gap between what a standard fire risk assessment covers and what a lithium battery environment actually requires.
The gap is closeable. Fire and Safety UK provides the specialist assessment, the correct suppression products, and the ongoing compliance support that Welsh businesses need to close it before an incident closes it for them.
Contact Fire and Safety UK today to arrange your specialist lithium battery fire risk assessment for your Welsh commercial premises.