Why EV charging fire risk matters in London now

EV uptake in London continues to rise. Consequently, the number of chargepoints in residential blocks, workplaces and public streets is growing fast. Rapid deployment without adequate planning increases the chance of electrical faults, overheating and battery-related fires.

London presents unique challenges: many buildings are older and have ageing electrical distribution, and space constraints can alter ventilation and escape routes. Treat EV charging as a distinct fire risk and manage it accordingly.

Common causes of charging-station fires

Understanding causes helps you prevent incidents. The most frequent triggers include:

• Poor installation and incorrect wiring. A substandard installation can overload circuits and cause faults.
• Incompatible or damaged cabling and connectors. Frayed cables increase resistance and heat.
• Overloaded electrical infrastructure. Multiple high-power chargers on a single distribution board can exceed capacity.
• Faulty or counterfeit charging equipment. Non-compliant devices often lack essential safety features.
• Lithium-ion battery failures during charging. Thermal runaway can lead to intense fires that are hard to extinguish.

Each cause is manageable when you apply the right controls, such as qualified installation, routine inspections and proper load management.

Regulatory and standards framework for 2025

You must meet the law and follow recognised standards. The Regulatory Reform (Fire Safety) Order 2005 places duties on responsible persons for non‑domestic premises. In London, local building regulations and planning policies may also apply.

For electrical safety and installations, adhere to the IET Wiring Regulations (BS 7671). Additionally, manufacturers and installers should comply with relevant product standards and approvals.

For authoritative guidance, consult the Health and Safety Executive and the National Fire Chiefs Council:

• Health and Safety Executive (HSE)
• National Fire Chiefs Council (NFCC)

Carry out a specific EV charging fire risk assessment

Start with a targeted risk assessment that focuses on EV charging. This assessment should be part of your overall fire risk assessment.

Key steps:

• Map all chargers and associated electrical routes.
• Identify potential ignition sources and nearby combustible materials.
• Assess ventilation and heat dissipation — enclosed car parks demand special attention.
• Check escape routes for potential obstructions from charging infrastructure or cables.

Record findings and set clear, prioritised actions. For professional assessments, consider specialist providers who understand EV hazards. Total Safe UK can assist with tailored fire risk assessments and compliance planning; see our fire safety services and our company homepage.

Best practice for installation and site planning

Use qualified electricians and accredited installers who follow BS 7671 and manufacturer guidance. Ensure planners consider electrical supply capacity and future expansion.

Practical guidance:

• Place chargers to reduce fire spread and maintain clear escape routes.
• Maintain safe distances from combustible materials and avoid installations within enclosed storage areas.
• For multi‑occupancy dwellings, install charging points outside flats where feasible, and provide designated, well-signed charging bays.
• Implement effective segregation using physical separation and fire-resistant barriers where needed.
• Keep cable routes tidy and avoid trailing cables across pedestrian paths.
• Choose chargers with recognised approvals and built-in safety functions (earth-fault detection, overcurrent protection, thermal cut-out).

Electrical infrastructure and load management

Evaluate distribution boards and incoming supply. Upgrade equipment where capacity limits pose a risk — for example, replace undersized circuit breakers and ensure protective devices match load requirements.

Adopt smart load management to prevent simultaneous high-power charging from overloading circuits. Load management systems allocate available power safely across multiple vehicles and reduce stress on transformers and feeders.

Consider local generation and storage (on-site batteries or solar). These can smooth peak demand but must be included in your electrical safety plan and assessed for fire implications.

Maintenance, inspection and testing regimes

Routine inspection stops problems before they escalate. Schedule periodic checks of chargers, cables and associated electrical equipment. Frequency depends on use intensity, but at minimum arrange annual visual inspections and functional tests.

• Use thermal imaging surveys to detect hotspots in distribution boards, connectors and cabling.
• Record all inspections, repairs and replacements in a maintenance log.
• Train staff to recognise early warning signs: burning smells, discoloured sockets or frequent tripping.
• Tag and remove suspected faulty equipment from service until repaired.

Monitoring, alarms and remote controls

Install monitoring systems to track charger performance and electrical load. Real‑time alerts reduce the time between fault detection and remedial action.

Where possible, enable remote isolation so you can cut power to a unit showing unsafe behaviour. Integrate charging monitoring with building management systems to centralise alerts and responses.

Consider linking EV charging alarms to your fire detection service or facilities team to ensure a fast, coordinated response.

Emergency planning and response for EV fires

Prepare targeted emergency procedures for EV incidents and consult the local fire and rescue service about their approach to vehicle batteries. NFCC operational guidance informs emergency planning.

Do not attempt to move a burning EV. Focus on evacuation and preventing escalation unless you are a trained firefighter.

Provide clear reporting routes, designate roles for staff and train teams to manage initial response safely (cordoning off the area and isolating power if safe). Understand that firefighters may use large volumes of water to cool lithium-ion battery cells and prevent re-ignition.

Run regular drills including EV charging scenarios to build competence and reveal weak points.

Insurance, procurement and record-keeping

Communicate with your insurer. Some policies expect documented risk assessments and maintenance programmes for EV charging. Failure to disclose installations or to maintain them can affect cover.

When procuring chargers, prioritise reputable suppliers with warranty and compliance documentation. Maintain purchase, installation and inspection records to demonstrate due diligence and support insurance claims or enforcement enquiries. Keep a digital audit trail for all equipment and actions.

Practical measures for London landlords and property managers

If you manage flats or shared facilities, set clear policies for resident charging — require residents to use designated points rather than domestic extension leads. Provide guidance on safe charging habits and on reporting equipment faults.

Coordinate with local authorities when on-street or communal chargers are installed. London boroughs often have specific planning requirements and may offer funding or guidance. For national policy and local planning advice refer to GOV.UK.

Plan for future-proofing: specify cabling and distribution upgrades that accommodate higher charging density. Small upgrades now can avoid larger, disruptive works later.

Summary and next steps

Combine strong governance, competent installation, regular inspection and emergency planning. Start with a specific EV charging risk assessment, ensure qualified installation and adequate electrical capacity, then implement monitoring, maintenance and staff training.

If you need practical support, a fire safety consultancy can provide assessments, policies and training tailored to your site. For professional help with compliance, contact a specialist such as Total Safe UK via our main site or explore our service offerings.

For further technical guidance, consult the Health and Safety Executive (HSE) for electrical safety and the National Fire Chiefs Council (NFCC) for EV fire response.

FAQ

Q: What immediate steps should I take if a charging station shows signs of overheating?

A: Isolate power to the unit if it is safe to do so. Evacuate nearby people and call the fire service if there is visible smoke or flame. Report the issue to your maintenance provider and tag the unit out of service.

Q: Who is responsible for fire safety when chargers are installed in a communal car park?

A: The responsible person under fire safety law is typically the building owner or manager. They must assess risks, maintain equipment and ensure safe operation. Lease agreements may allocate some responsibilities to residents, but legal duties remain with the responsible person.

Q: Are portable EV chargers safe to use with communal sockets?

A: Portable chargers can be safe if used correctly, but they often pose higher risk when connected to unsuitable sockets or through extension leads. Prefer fixed, professionally installed chargepoints in communal areas.

Q: How often should EV charging stations be inspected?

A: At minimum, conduct an annual inspection and functional test. High-use or exposed equipment may require more frequent checks. Use thermal imaging and routine visual inspections to spot early issues.

Q: Can my insurance be affected by EV charging installations?

A: Yes. Notify your insurer about new chargers and maintain records of installation, inspection and maintenance to help ensure cover remains valid and to demonstrate due diligence.