How to Ship a Diesel Generator from China: Freight and Packing Guide

A diesel generator purchased from a Chinese manufacturer does not arrive at your site automatically. Between the factory test certificate and the generator starting up at your facility, there is a logistics chain that involves packing, loading, documentation, ocean freight, port clearance, and inland transport. Each stage has specific requirements -- and each stage has specific ways to go wrong.

Most buyers who import generators from China for the first time are surprised by the complexity of the freight process. The generator is a large, heavy, mechanical and electrical item that requires specialised packing and securing. It contains a battery (dangerous goods), may contain residual fuel (additional dangerous goods classification), and ships under a set of export documents that must be precisely correct for the destination country's customs clearance.

This guide covers the complete shipping process from factory to destination port, with the specific requirements and cost benchmarks that make the difference between a smooth delivery and an expensive, time-consuming problem.

Step 1: Choosing the Right Container Type

Container selection depends on the generator's dimensions and weight. Getting this wrong means either the generator does not fit, or it fits but cannot be safely loaded and unloaded.

  ⚓  20-Foot Standard Container (20ft GP) -- Most Common for Single Units

  Internal dimensions: 5.9m L x 2.35m W x 2.39m H. Maximum payload: approximately 28,000 kg. Suitable for: most generator sets from 10kW to 500kW in open type or canopy configuration. A single 100kW silent canopy generator (approximately 2.4m L x 1.0m W x 1.5m H, 1,500 kg) fits comfortably with room for accessories, documentation packs, and spare parts. Two smaller generators (20-60kW) can typically be loaded in a single 20ft container.

  ⚓  40-Foot Standard Container (40ft GP) -- Multiple Units or Larger Sets

  Internal dimensions: 12.0m L x 2.35m W x 2.39m H. Maximum payload: approximately 26,500 kg (lower per-unit payload than 20ft due to container weight). Suitable for: multiple generator sets shipped together; single large generators up to approximately 600kW. Loading multiple generators in a 40ft container significantly reduces per-unit freight cost -- the freight rate for a 40ft container is typically 1.4-1.7x the 20ft rate, not 2x.

  ⚓  40-Foot High-Cube Container (40ft HC) -- Extra Height Required

  Internal height: 2.69m (vs 2.39m standard). Useful when generator height with shipping frame and top accessories exceeds 2.2m. Large canopy generators above 500kW often require high-cube containers due to height. Premium over standard 40ft: typically $100-300 per container.

  ⚓  Flat Rack Container -- Oversized Generators

  For generators that exceed container internal dimensions -- typically large open-type sets above 800kW, or generators with remote radiators extending the overall dimensions -- a flat rack (open-sided container platform) is required. Flat racks allow craning from the side and do not restrict height. Cargo on flat racks requires weatherproof covering (tarpaulin). Cost: typically 2-4x the equivalent 20ft container rate, plus lashing and covering costs. Always check generator dimensions against container internal dimensions before booking.

Step 2: Packing and Securing Inside the Container

Generator transit damage from inadequate packing and securing is one of the most common causes of claims against Chinese exporters. The generator must be immobilised against movement in all six directions -- forward, backward, left, right, up, and down -- for a voyage that may include rough seas, port handling shocks, and multiple crane lifts.

  Step 2a: Wooden Skid or Steel Cradle

  The generator base frame should be bolted to a wooden skid or steel cradle that distributes the generator's weight across the container floor and provides a stable base for lashing points. For generators with integral sub-base frames, the frame itself serves as the skid -- it must be bolted or chocked against sliding. Minimum skid timber: 100mm x 100mm hardwood. For generators above 3,000kg, steel cradles with welded anchor points are recommended.

  Step 2b: Lashing and Securing

  The generator must be secured to the container floor and walls using steel lashing straps or chains rated for the generator's weight. Minimum four lashing points for generators up to 2,000kg; six or more for heavier units. Each lashing strap must be rated at a safe working load exceeding the generator weight divided by the number of lashings. The lashing angle should be approximately 45 degrees -- too shallow reduces the vertical restraint component. Lashing points must be attached to the container's integral lashing rings -- not to container walls.

  Step 2c: Anti-Vibration and Corner Protection

  Place rubber or foam anti-vibration pads between the generator base and the container floor or skid -- this prevents fretting damage during vibration. Protect all sharp corners and projecting components (exhaust outlets, fuel tank fittings, control panel corners) with foam padding or cardboard packing to prevent damage from contact with container walls during movement.

  Step 2d: Desiccant and Moisture Protection

  Ocean containers are subject to condensation, particularly on voyages crossing climate zones (cold seas to tropical ports). Place silica gel desiccant bags inside the container -- minimum 1kg per 10 cubic metres of container volume. For electronics-sensitive components (control panels, AVR boards), wrap in vapour-barrier film before packing. For long voyages (>25 days) or voyages to high-humidity tropical destinations, increase desiccant quantity by 50%.

  ⚠  The most common transit damage: unsecured accessories inside the container

  The generator itself may be correctly secured, but loose items inside the container -- spare parts boxes, documentation packs, tools, accessories -- become projectiles in heavy swell. Every item inside the container must be secured or packed in sealed boxes. A spare filter box that slides across the container in rough seas and impacts the control panel door is a real damage scenario that causes claims and delays. Insist that your supplier secures all items, not just the main generator.

Step 3: Dangerous Goods Classification -- Batteries and Fuel

Diesel generators contain components classified as dangerous goods under IMDG (International Maritime Dangerous Goods) regulations. Failure to declare and document dangerous goods correctly results in shipment rejection at the port of loading, penalties, and potential cargo abandonment.

  ⚠  Start Battery -- UN3480 or UN3481

  The lead-acid or lithium starting battery in the generator control panel is classified as a dangerous good. Lead-acid batteries shipped wet (containing electrolyte): UN2794 Class 8. Lead-acid batteries shipped dry (electrolyte separate): UN2800. Lithium ion batteries: UN3480 (standalone) or UN3481 (contained in or packed with equipment). Most generator batteries are lead-acid wet batteries. The shipper must declare the battery on the dangerous goods declaration and comply with packaging requirements (battery terminals protected against short circuit; battery securely mounted in the generator).

  ⚠  Residual Fuel in Tank -- UN1202

  Diesel fuel (Gas Oil) is classified as UN1202, Class 3 Flammable Liquid, Packing Group III. If the sub-base fuel tank is shipped containing any quantity of diesel fuel, it must be declared as dangerous goods. The quantity is limited by dangerous goods shipping rules -- typically, generators may be shipped with fuel tanks at maximum 1/4 capacity for sea freight, with full dangerous goods documentation. Alternatively -- and most commonly -- generators are shipped with fuel tanks empty or dry, avoiding the dangerous goods fuel classification entirely.

  ✔  Standard practice: ship with empty fuel tank to simplify dangerous goods compliance

  Most Chinese generator manufacturers ship generators with the fuel tank drained and dry. This eliminates the UN1202 fuel classification and simplifies the dangerous goods declaration to the battery only. The shipper declares only the battery under the appropriate UN number. The buyer adds fuel at the destination. This is the recommended approach for all export shipments -- confirm with your supplier that the tank will be drained before loading.

Step 4: Export Documentation from China

The export documentation package from China must be complete and accurate. Any discrepancy between documents causes customs problems at the destination -- either delays while corrections are obtained, or in worst cases, shipment rejection.

  The document timing rule: the commercial invoice and packing list must be finalised before the dangerous goods declaration can be completed. The DGD must be submitted to the shipping line at least 24-48 hours before container loading. The B/L is issued after the vessel departs. The Certificate of Conformity (PVoC) must be obtained before loading for Kenya, Tanzania, and Ghana. Plan the documentation sequence carefully -- any one missing document can delay the entire shipment.

Ocean Freight Cost Benchmarks: 2025 Reference Rates

Ocean freight rates fluctuate with market conditions and are best confirmed with a freight forwarder at the time of booking. The following are indicative reference rates for a standard 20ft container from main Chinese export ports (Shanghai, Ningbo, Guangzhou) to major destination ports. Rates include basic ocean freight only -- port surcharges, fuel surcharges (BAF), and destination port handling charges are additional.

  These rates are indicative for 2025 market conditions. Actual rates at time of booking may differ by 20-40% depending on market conditions, shipping line, booking lead time, and whether the cargo is classified as general cargo or dangerous goods (DG surcharges apply). Always obtain a confirmed rate from a freight forwarder before including freight in your budget.

The Five Most Expensive Shipping Mistakes

  1  Shipping without pre-shipment inspection for PVoC-required markets

  Kenya, Tanzania, Ghana, and several other African markets require a Certificate of Conformity (CoC) from an accredited inspection body before the cargo departs China. A generator arriving at Mombasa, Dar es Salaam, or Tema without a valid CoC will be detained at the port, potentially for weeks, while the importer arranges an expensive destination inspection. Detention charges (demurrage and port storage) accumulate daily. For a shipment held two weeks at Tema, demurrage alone can exceed $2,000-4,000. The CoC costs $400-800 and takes 5-7 days to arrange in China -- always cheaper than the alternative.

  2  Underdeclaring cargo value on the commercial invoice

  Some buyers ask Chinese suppliers to undervalue the generator on the commercial invoice to reduce import duties at the destination. This is customs fraud -- a serious offence in every jurisdiction that results in cargo seizure, substantial fines, and potential criminal prosecution. Beyond the legal risk: if the generator is damaged in transit and an insurance claim is filed, the insurer pays based on the declared invoice value, not the actual value. An undervalued shipment is significantly underinsured.

  3  Losing or mishandling the original Bill of Lading

  The original Bill of Lading is the title document for the cargo. The shipping line will only release the cargo at the destination to the holder of the original B/L (or a valid sea waybill equivalent). If the original B/L is lost in transit by post, misplaced by the buyer, or delayed, the cargo sits at the port accumulating demurrage until a Letter of Indemnity (LOI) is issued by the consignee's bank -- a time-consuming and expensive process. Use courier (DHL, FedEx) for B/L dispatch; never send original B/Ls by regular post.

  4  Choosing the wrong Incoterm for your capability

  EXW (Ex Works) means the buyer is responsible for all logistics from the factory gate. FOB (Free on Board) means the seller loads onto the vessel; the buyer arranges ocean freight and destination logistics. CIF (Cost Insurance Freight) means the seller arranges shipping and insurance to the destination port; the buyer handles port clearance and inland transport. First-time importers who choose EXW without a freight forwarder in place often discover they cannot arrange export customs clearance in China, cannot book a container, and cannot produce the required export documents -- causing the shipment to be delayed while the seller re-arranges on the buyer's behalf.

  5  Not booking cargo insurance

  Ocean shipping involves real physical risk -- containers are lost overboard, cargo is damaged by water ingress, generators are damaged by poor handling at ports. Without cargo insurance, the generator buyer bears these losses entirely. The shipping line's liability is limited under the Hague-Visby Rules to approximately $500-600 per package regardless of actual value. A 100kW generator worth $16,000 can be recovered at most $600 from the shipping line if the container is lost. Cargo insurance (All Risks, CIF + 10%) costs approximately 0.3-0.6% of cargo value -- for a $16,000 generator, that is $48-96. Always purchase it.

Leading Power Export Process: What We Handle

We export diesel generators to 60+ countries annually. Our standard export process handles the complete documentation and logistics preparation on behalf of our buyers.

· Container selection and loading: we assess generator dimensions and weight, select the correct container type, and supervise loading and securing at our factory in Fu'an

· Packing and securing: generators shipped on steel-reinforced wooden skids, lashed with rated steel straps, padded at contact points, and packed with silica gel desiccant

· Fuel tank: drained empty before loading as standard practice -- eliminates dangerous goods fuel classification

· Battery declaration: lead-acid start battery declared as dangerous goods per IMDG regulations on all shipments -- no exceptions

· Documentation: commercial invoice, packing list, certificate of origin (Form E for ACFTA markets), factory test certificate, CE declaration -- all prepared before vessel departure

· PVoC inspection: for Kenya (KEBS), Tanzania (TBS), Ghana (GSA), and other PVoC-required markets -- we schedule the inspection with SGS or Bureau Veritas at least 3 weeks before planned loading, coordinate the inspector visit, and obtain the CoC before container sealing

· Freight coordination: we work with established freight forwarders from Ningbo and Guangzhou ports; we can recommend freight forwarders and obtain freight quotes for buyers who prefer to arrange their own shipping

· Cargo insurance: we recommend All Risks cargo insurance and can assist buyers in obtaining coverage through our insurance partners

· B/L handling: original B/Ls dispatched by DHL courier to buyer on vessel departure day; tracking number provided

· 24-hour response to logistics questions during the shipping process

Leading Power is a CE-certified diesel generator manufacturer based in Fu'an, Fujian, China. Established in 2008. 5kW-3,000kW generator sets exported to 60+ countries. Complete export documentation, PVoC inspection coordination, and freight support for all shipments. 24-hour response.