Navigate the evolving fire safety challenges of electric vehicle charging infrastructure in enclosed car parks and multi-storey buildings.. The EV Revolution and Fire Safety The rapid adoption of electric vehicles is transforming car park fire safety. With the UK government targeting the end of new petrol and diesel car sales, the installation of EV charging infrastructure in existing and new car parks has accelerated dramatically. However, the unique fire characteristics of lithium ion batteries demand a fundamental reassessment of traditional car park fire safety strategies. Lithium Ion Battery Fire Characteristics EV battery fires differ fundamentally from conventional vehicle fires: Thermal runaway — self sustaining exothermic reaction reaching temperatures above 1000°C Toxic gas production — hydrogen fluoride (HF), hydrogen cyanide (HCN), phosphoryl fluoride Extended duration — EV fires can last 2 3 times longer than conventional vehicle fires Reignition — batteries can reignite hours or even days after apparent extinction Water consumption — firefighting may require 10,000 40,000 litres compared to 2,000 3,000 for conventional vehicles Explosive potential — gas accumulation in enclosed spaces creating explosion risk Current Guidance Landscape The regulatory framework is evolving rapidly: ADB Volume 2 (2022) — limited specific EV guidance, refers to BS 9999 BS 9999:2017 — car park provisions pre date widespread EV adoption BRE Report BR 187 — external fire spread calculations may need updating for EV fire loads BESA Guide — Building Engineering Services Association guidance on car park ventilation RISC Authority RC59 — recommendations for car park fire safety ABI Research — Association of British Insurers position papers Design Considerations for EV Charging Areas Detection Linear heat detection cables along charging bays Flame detectors (IR/UV) for rapid response Gas detection for thermal runaway off gases Video fire detection (VFD) as supplementary detection Suppression Sprinkler systems designed for higher fire loads (ESFR or specific EV rated heads) Water mist systems for enclosed areas Consideration of battery containment blankets Drainage design for contaminated firefighting water Ventilation Enhanced extraction rates for toxic gas dilution Impulse fan systems designed for longer duration fires Consideration of hydrogen gas (lighter than air) behaviour Emergency ventilation activation linked to detection systems Structural Considerations EV fires can produce higher peak temperatures and longer durations than the design fires traditionally used for car park structures: Reassessment of structural fire resistance where EV charging is concentrated Enhanced concrete cover or spalling protection in charging zones Consideration of progressive collapse risk in older structures Post fire structural assessment procedures Operational Measures Maximum state of charge policies for overnight parking Spacing requirements between charging vehicles Emergency response plans specific to EV fires Staff training on EV fire response Insurance implications and notification requirements Magnus Opifex SEVEN LTD's EV Fire Safety Services Our fire engineers are at the forefront of EV charging fire safety, having advised on major car park projects across the UK. We provide fire risk assessments, fire strategy reports, and CFD modelling specific to EV charging scenarios, helping developers and operators navigate this rapidly evolving area. Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.