Maritime Transport Of Electric Vehicles
The global demand for New Energy Vehicles (NEVs) is surging, and the numbers are staggering. In the first half of 2025 alone, China’s NEV exports hit 1.42 million units. In response, massive Roll-on/Roll-off (RoRo) fleets to help secure global logistics of NEV’s. Shipping an EV is not the same as shipping a gasoline car, and treating it as such can have catastrophic consequences. The primary threat?
Thermal runaway, an unstable and self-sustaining chemical reaction in a lithium-ion battery that is incredibly difficult to control once it starts.
Challenges on Deck
The unique properties of NEVs create a new risk profile for maritime transport, challenging traditional RoRo operations, vessel design, and safety protocols.
- A Different Kind of Fire: An EV fire isn’t just a fire; it’s a chemical event. Thermal runaway generates immense heat and releases toxic, flammable gases, posing a severe explosion risk. Conventional firefighting systems like CO2 or foam may struggle to contain it, as they cannot stop the underlying chemical reaction.
- Regulatory Uncertainty: The international regulatory landscape is still catching up. The IMO is developing mandatory rules, but they aren’t expected until 2027. In the meantime, crucial exemptions in the IMDG Code mean that NEVs on RoRo vessels are often handled as ordinary cargo, without the stringent protocols required for other dangerous goods. This leaves operators in a precarious position, navigating a web of evolving guidelines and potential liabilities.
- Operational Complexities: From port to sea, every step requires specialized attention:
- State of Charge (SoC): The battery’s charge level is a critical safety factor. While industry consensus is moving toward an optimal SoC of 30-50% for transport, a higher charge can lead to a more violent fire, while a lower charge can increase the risk of a Vapour Cloud Explosion (VCE).
- Stowage and Stability: EVs are roughly 25% heavier than their combustion-engine counterparts. This extra weight, combined with dense stowage patterns that can leave as little as 10 cm between vehicles, impacts vessel stability and severely hinders firefighter access in an emergency.
- Firefighting Water: The large quantities of water needed to cool an EV fire pose a grave threat to a RoRo vessel’s stability. Water accumulation on deck can lead to the “free surface effect,” potentially capsizing the ship.
How Electrios Can Help
Navigating this new era of maritime logistics requires specialized expertise. At Electrios, we provide comprehensive consulting and advisory services to help RoRo operators and EV OEMs manage these risks proactively and effectively.
Our services are designed to protect your assets, ensure compliance, and secure your place in the future of automotive shipping.
- Portside Risk Mitigation & Compliance: We conduct pre-loading cargo screening, documentation audits, and develop terminal safety protocols to ensure every vehicle is safe before it comes aboard.
- Stowage & Lashing Audits: Our experts review and optimize your stowage plans to account for the unique weight and safety requirements of NEVs, ensuring stability and regulatory compliance.
- Emergency & Incident Response: We help you develop robust emergency response plans tailored to NEV fire risks and provide post-incident support to minimize downtime and liability.
- Strategic Consulting: For OEMs building their own fleets or optimizing their supply chains, we offer strategic advisory services to ensure your operations are built on a foundation of safety and efficiency.
Download Our Exclusive Whitepaper
To help you better understand and navigate these challenges, we have compiled our expertise into a comprehensive whitepaper: The Electrios Guide to Maritime Transportation of Electric Vehicles on RoRo Vessels.
This essential guide provides an in-depth analysis of:
- The science behind thermal runaway and explosion risks.
- The current and future regulatory landscape.
- Best practices for SoC management, stowage, and securing.
- Advanced firefighting strategies and modern vessel design features.
[Download FREE Whitepaper Here]
Contact our expert consultants today at info@electrios.com.
