Over the past 18 months the US offshore wind market has battled its way into existence, putting steel in the water and persuading politicians to put their necks on the line for a still-expensive technology with a virtually nonexistent workforce in the US.

Now comes the tricky part. Over the next five or ten years, the sector will attempt to move from being a curiosity at the margins of the US energy market to a profitable and jobs-rich industry, capable of powering densely populated coastal states.