Sourcing hydroelectric generating sets from China

Zero duty on the relevant generating-set line

Heading 8502 covers electric generating sets and rotary converters. This guide concerns water-driven turbine and generator assemblies. The table illustrates different turbine configurations against the same candidate commodity line, rather than separate tariff bands. For turbines and water wheels supplied separately, see the hydro turbines and water wheels guide. For diesel-powered equipment, see sourcing diesel generating sets. For gas-powered equipment, see sourcing gas turbine generating sets.

Read from the UK Trade Tariff on 1 October 2026, the supplied entry for 8502 39 80 90 carries 0% duty for goods from China. It records no anti-dumping or countervailing measure, suspension or attached import control. These findings describe the supplied tariff snapshot for that line.

Before ordering, confirm the commodity code using the turbine type, generator details and exactly what arrives together. Give your customs broker the assembly drawings and packing list, especially when the turbine, generator and controls are shipped separately.

Specify the head, flow and complete assembly

Give the factory the available net head at the turbine, usable water flow and seasonal operating range. Request an output and efficiency curve for those conditions. Agree the turbine design, runner material, sediment exposure, shaft arrangement and generator cooling. State whether the set will operate independently or connect to the electricity network, and identify who supplies the governor, excitation controls and protection panel.

For supply in Great Britain, the responsible person must complete the relevant machinery conformity assessment and affix the applicable conformity marking. Ask for a declaration identifying the supplied assembly, operating instructions and supporting safety evidence. Agree who assesses the assembled set when different suppliers provide the turbine and generator. Arrange testing and certification support before shipment.

Worked duty example

Illustrative example, not a quote: 1 complete hydroelectric generating set, illustrative order under 8502 39 80 90, invoiced at £20,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £21,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £21,500, so it is £4,300. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Performance: witness a test at the agreed head and flow, recording electrical output, voltage, frequency and efficiency. Keep the measured water conditions with the results.

Mechanical assembly: check runner workmanship, shaft alignment, bearing temperatures, vibration, seal leakage and coupling guards against the approved drawings and acceptance criteria.

Controls and protection: check the governor response, emergency stop and overspeed protection through an agreed safe test procedure. Compare panel wiring and generator identification with the supplied documents.

Arrival condition: inspect crates, corrosion protection, loose components and transit restraints. Record damage before unpacking and compare serial numbers and accessories with the packing list. Use a product-specific inspection brief.

What goes wrong

A factory's advertised output may depend on more head or flow than the site provides. A generator bench test cannot establish the assembled turbine's hydraulic performance. Other problems include poorly aligned couplings, leaking seals, unstable speed after load changes and paperwork describing components rather than the delivered assembly. Write measurable acceptance criteria into the order and retain the test records.

In England, most hydropower schemes need a water resources abstraction licence or impounding licence. Confirm the site's permission position before committing to equipment, and have the project designer check the proposed operating conditions. Product conformity and a successful factory test do not establish whether the selected equipment suits the site.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.