North Sea offshore wind stopped getting cheaper. The industry is adjusting to a different kind of project.

For most of the past decade, offshore wind in the North Sea produced a reliable headline: the cheapest auction result yet. That sequence broke, and the correction has been more informative than the streak.

Why costs turned

Offshore wind is an unusually capital intensive technology with a long build period, which makes it unusually sensitive to the cost of money. When financing costs rose, the effect on the levelised cost was immediate and large.

Supply chain inflation compounded it. Vessels, cable, steel and port capacity all tightened at once, and turbine manufacturers had been competing on price into thin margins for years.

What the auctions got wrong

Zero subsidy and negative bidding auctions transferred market risk entirely to developers, which worked while costs were falling and stopped working when they were not. Several awarded projects were handed back.

The response has been a partial return to contracts that share risk: indexed strike prices, inflation adjustment and earlier grid commitment from the state side.

The manufacturing question

European turbine manufacturing spent years in loss-making competition. A stable order pipeline matters more to that industrial base than a marginally lower auction price, and several governments have concluded, late, that a supplier that cannot make money is not a cheap supplier.

What to expect

Costs are unlikely to return to the lows of the previous decade soon, and the projects being built now are larger, further offshore and technically harder.

The realistic read is that offshore wind remains among the cheapest new bulk generation available in northern Europe, and that the era of it being dramatically cheaper every year is over. Planning on the first statement is sound. Planning on the second was always the error.