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 it proposed, compared to Mayflower Wind’s 400MW.

The total project award puts Massachusetts once again in the pack of national leaders, with over 3.2GW