Iberdrola was the biggest winner in Massachusetts' latest offshore procurement round as its Commonwealth Wind bid secured more than 1.2GW, with Shell-Ocean Winds tie-up Mayflower Wind also successful.

Massachusetts awarded all 1.6GW on the table for its round 3 offshore wind auction, with both developers already contracted for power delivery in the state walking away with further capacity. The lopsided allocation awarded Commonwealth Wind all 1.2GW