The US’ largest offshore wind project, a 2.6GW behemoth off the coast of Virginia, was greenlighted by the state utilities regulator following a dispute over performance guarantees and despite concerns regarding final costs.

The State Corporation Commission (SCC) approved utility Dominion Energy’s $9.8bn Coastal Virginia Offshore Wind (CVOW) project despite forecasts that it is “likely the costliest project being undertaken by any regulated utility in the US”.