IMDG 42-24: The 2026 Rulebook Rewriting How Electric Cars Ship From China
On 1 January 2026 the maritime rulebook for battery-powered vehicles changed. If you import electric cars from China, shipping is no longer only a question of price and vessel space: it is now a documentation discipline, where a single wrong box on a customs form can park your units at the terminal for weeks. Amendment 42-24 to the International Maritime Dangerous Goods (IMDG) Code is mandatory, and it rewrote how electric and hybrid vehicles are classified, charged and declared at sea.
What changed on 1 January 2026
Battery-electric vehicles no longer travel under the generic entry UN3171. A lithium-ion BEV is now classified as UN3556, "Vehicle, lithium ion battery powered", with UN3557 and UN3558 covering lithium-metal and sodium-ion vehicles. UN3171 is no longer permitted for lithium or sodium battery vehicles in maritime transport. Hybrids that still carry a combustion engine remain under UN3166, where the flammable fuel governs. Air freight moved earlier: IATA required the new classifications from 31 March 2025. Every electrified vehicle is Class 9 dangerous goods, shipped under packing instruction P912 for vehicles and the conditions of Special Provision 388 - the installed battery must be UN 38.3 tested, securely fastened, protected against short circuit and undamaged.
The 30 percent charge rule
Carriers now cap state of charge. The common limit is 30 percent or less, and it must be proved in writing rather than confirmed verbally. Logistics providers advise discharging to 20–30 percent at least 48 hours before the vehicle reaches the port and moving units on flatbed trucks instead of driving them, so the documented charge level holds. After several high-profile car-carrier fires, RoRo lines also tightened handling: charge caps, battery condition attestations and outright refusal of damaged or recalled batteries are now standard practice.
The paperwork carriers now ask for
A dangerous-goods declaration for the correct UN entry, signed by the shipper or a DG-certified forwarder;
A battery condition and state-of-charge attestation showing capacity, percentage, verification method, date and signature;
The manufacturer's UN 38.3 test summary for the exact traction battery model, usually dated within five years;
Battery capacity in kWh stated on the commercial invoice and packing list;
The propulsion type declared to the carrier at the time of booking.
RoRo or container?
RoRo suits operable vehicles, larger volumes of roughly ten units or more, and destinations that have vehicle terminals such as Los Angeles, Hamburg, Dubai or Sydney. Vehicles are driven on and off, however, so minor scratches and bumps are a genuine risk. Containers take one to two EVs per 40ft box, work well for non-operable cars and for destinations without RoRo service, and keep each unit secured for the whole voyage, which lowers damage exposure.
Where shipments fail, and what it costs
Most rejections happen at booking review, before anything is loaded. Declaring UN3171 instead of UN3556 gets a booking returned after three to five days of review, and in peak season that becomes two to three weeks lost. Missing state-of-charge documentation adds one to two weeks together with roughly 1,000 to 2,000 US dollars in fees. A missing, outdated or wrong-model UN 38.3 summary is worse still, because the certification itself needs four to six weeks. Suppliers who cannot sign a dangerous-goods declaration leave you paying 200 to 500 US dollars for a forwarder to sign instead, plus three to five extra days. Booking lead times for dangerous-goods EV shipments run two to three weeks in a normal season and four to six weeks during the September to November peak.
Key takeaways
Confirm the classification first: UN3556, UN3557 or UN3558, never UN3171.
Request the UN 38.3 summary for the exact battery at quotation stage, not after the order.
Document state of charge in writing at 20–30 percent and keep it there until loading.
Choose RoRo or container early: terminal availability, unit count and vehicle condition decide it, not price alone.
Importing electric vehicles from China in 2026? Talk to our export team before you book, and we will confirm the UN classification, the state-of-charge documentation and the right shipping mode for your market.
Company Name: Jingsun Car Co., Ltd
Website: https://www.sin-auto.com/?url=jingsuncar.com
Service Countries: Ghana / Algeria / Cambodia / Middle East / East Africa (Years of practical experience, familiar with customs clearance rules of various countries)