U.S. imports of AC Generators (Alternators), Exceeding 750 KVA Output (HS 850164) totaled $106.8M in August 2026, imported from 31 countries.
Importers of AC Generators (Alternators), Exceeding 750 KVA Output paid $17.1M in duties in August 2026, an average duty rate of 16.00% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataLarge-capacity alternators exceeding 750 KVA serve utility-scale power generation, industrial co-generation, and renewable energy infrastructure — including dedicated wind turbine generator applications carved out under tariff lines 8501640110 and 8501640121. The US schedule further stratifies output into bands up to 10,000 KVA, 10,000–40,000 KVA, and above 40,000 KVA, each with distinct 10-digit lines, making precise output documentation essential at entry. Mexico is the leading supplier, with Romania and the Czech Republic — both EU members — also prominent sources. Units destined for wind power generating sets (HTS 8502.31.00) must be correctly identified at import to land in the appropriate tariff line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.3K import shipments a month
To claim a wind-power-specific line, importers typically need manufacturer documentation confirming the alternator is designed and intended for use in wind power generating sets classified under HTS 8502.31.00. A general-purpose alternator of the same KVA rating would fall into the non-specific (NES) lines. CBP may request engineering specifications or purchase orders confirming end-use.
The heading is subdivided into three output tiers — 750 KVA to 10,000 KVA, 10,001 KVA to 40,000 KVA, and above 40,000 KVA — each with separate 10-digit HTS lines. For large utility or hydro alternators, the rated output on the manufacturer's nameplate or test certificate is the controlling figure. Importers of multi-unit shipments should verify each unit's rating individually, as a single shipment may contain units spanning more than one tariff line.
Subheading 6 of 17 in heading 8501
Subheading 850164 · $106.8M of $1.2B
ImportsExports
Imports
$106.8MYoY · free account
Exports
$14.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.2B of AC Generators (Alternators), Exceeding 750 KVA Output and exported $258.2M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8501640125 | AC Generators (Altrs) Bw 750 Kva - 10,000 Kva, Nes | $46.5M | 14.20% | 50.26% | $6.6M |
| 8501640155 | AC Generators (Alternators) Exceeding 40,000 Kva | $29.3M | 12.44% | 100.00% | $3.6M |
| 8501640110 | AC Genrtrs Gt750kva, For Wind Pwr Gnrtr 8502.31.00 | $20.7M | 27.33% | 100.00% | $5.6M |
| 8501640135 | AC Generators (Alt) Gt 10000 Kva But Lt= 40000 Kva | $10.1M | 11.45% | 100.00% | $1.2M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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Imports · August 2026
origin
China pays 40.1% duty; Mexico 0.1%.
customs district
destination
entry
rate provision · imports
21.7% enters free of duty; duty collected equals 16.00% of imports for consumption.