<page_title> List of offshore wind farms </page_title> <section_title> Largest operational offshore wind farms </section_title> <table> <cell> Walney Extension <col_header> Wind farm </col_header> </cell> <cell> 659 <col_header> Capacity (MW) </col_header> </cell> </table>
The Walney extension has a capacity of 659 MW making it the largest offshore wind farm.