The Commerce Department just opened a Section 232 "national security" probe into imported wind turbines and parts -- quietly on Aug. 13, publicly today. That matters because 232 isn't a press release; it's a legal on-ramp to more tariffs on top of the new 50% duty already applied to the steel and aluminum content in turbines and components.
Here's the operational read: the U.S. wind build is heavily import-dependent for blades, drivetrains, and electrical systems. In 2023, the U.S. brought in about $1.7B of wind equipment, with roughly 41% from Mexico, Canada, and China. If you tax the metal inside the machine -- and potentially layer more 232 duties later -- you squeeze project profit margins, renegotiate Power Purchase Agreements (PPAs -- long-term contracts to sell the power), or delay FIDs. None of those outcomes lowers your Levelized Cost of Energy (LCOE -- think of it as the average lifetime price per unit of electricity once you add up all the costs).
Wood Mackenzie pegs the tariff bite at +7% for turbine costs (+5% total project costs) under the earlier tariff proposals; in a universal 25% tariff scenario, turbine costs could rise ~10% and LCOE up ~7%. And that was before Commerce slapped a 50% surcharge on the steel/aluminum content -- so the floor just moved higher. Expect original equipment manufacturers to reroute supply chains, localize sub-assemblies, and raise prices anyway. Vestas has already said the quiet part out loud: these costs flow straight through to electricity prices.
Don't confuse this with an offshore-only story. Onshore wind is where the bulk of U.S. volume lives, and it's far more sensitive to every $/kW swing, gearbox delivery delay, and tower steel price jump. Section 232 is also being deployed against other "critical" imports (planes, chips, pharma), so wind isn't a one-off carve-out -- it's part of a broader, durable trade posture that project finance now has to underwrite.
Winners and losers? Near-term winners include U.S. tower fabricators and any blade/drivetrain maker who can credibly and quickly localize. Losers are developers stuck with fixed-price PPAs and engineering firms with thin contingencies. Grid bottlenecks and permitting are still the bigger choke points, but tariffs aren't a rounding error anymore -- they're line-item pain.
The probe suggests that "buy more domestic, pay more near-term" is policy, not rhetoric. Expect delayed Commercial Operation Dates (CODs -- the day projects actually flip the switch and start earning revenue), tougher PPA negotiations, and a faster push to U.S. content. Wind still looks okay economically on paper, just with a higher metal cost and a thinner margin for error.