UN3536
Last updated: June 14, 2026
- UN3536 is the UN number for lithium batteries installed in cargo transport units — large-scale BESS for energy storage
- Established 2019 under IMDG Special Provision 389; differs from UN3480 (standalone batteries) and UN3171 (vehicle batteries)
- Qingdao is China's primary port for UN3536 exports with the strongest DG infrastructure in northern China
UN3536 is the UN number for lithium batteries installed in cargo transport units — large-scale containerized battery energy storage systems (BESS). Established in 2019 under IMDG Code Special Provision 389, it differs from UN3480 (standalone lithium batteries) and UN3171 (battery-powered vehicles).
Chinese: UN3536类别 (UN3536 lèibié)
Why UN3536 Exists
Before 2019, there was no specific UN number for containerized battery energy storage systems. Shipments were classified under UN3480 (standalone batteries), which triggered stricter requirements including full DG Class 9 handling. UN3536 was created under IMDG Code Amendment 39-18 (effective 2020, with voluntary adoption from 2019) to provide a more appropriate regulatory framework for BESS — acknowledging that lithium batteries installed in a cargo transport unit present different risks than loose batteries in boxes.
Practical Example
A Chinese energy storage manufacturer in Qingdao exports two 40ft containerized BESS units to a solar farm project in South Africa. Each unit is a self-contained 20ft container with integrated lithium batteries, inverters, and cooling. Under UN3536, the shipping requirements include: UN38.3 test report for the batteries, MSDS, DG Packaging Certificate, and Maritime DG Declaration. The BESS units are loaded onto flat rack containers for ocean transport. Great Hensen manages the entire documentation and booking process with carriers that accept UN3536 cargo on the China-Africa route.
Related Terms
- IMDG Code — the regulatory framework that defines UN3536 requirements
- IATA DGR — air transport DG rules (UN3536 is sea-only; not accepted by air)
- MSDS — required safety document for all DG including UN3536
Frequently Asked Questions
How is UN3536 different from UN3480 and UN3171?
UN3480 covers standalone lithium-ion batteries (not installed in equipment). UN3171 covers battery-powered vehicles and equipment where the battery is installed. UN3536 specifically covers large-scale BESS where lithium batteries are installed in a cargo transport unit. UN3536 was established in 2019 under IMDG Code Amendment 39-18 to address the growing BESS export market.
What documentation is required for UN3536 shipments from China?
UN3536 shipments require: MSDS, DG Packaging Certificate, Maritime DG Declaration, UN38.3 test report for the lithium batteries, and a DG packing/lashing plan. The carrier also requires a stowage plan. As a UN3536 specialist, we manage this entire documentation package. See our UN3536 shipping guide.
Which Chinese ports can handle UN3536 shipments?
Not all ports accept UN3536. Qingdao has the strongest DG infrastructure in northern China and handles the majority of UN3536 exports. Shanghai (Yangshan) is building capability but with restrictions. Ningbo accepts on a case-by-case basis. Tianjin has limited acceptance. Always confirm port acceptance before booking — we verify with terminal and carrier before committing. Contact us to check port acceptance for your shipment.
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