At a ceremony in London, UK, Innogy’s chief operating officer for renewables, Hans Bünting, hailed the 353MW development "an outstanding renewables project".
Comprising 56 Siemens Gamesa 6.3MW turbines, the £1.5bn wind farm lies in the North Sea, 30km off Suffolk, eastern England, adjacent to the 504MW Greater Gabbard.
First power was generated in November 2017, while full operations commenced in March 2018.
Project director, Toby Edmonds added: "Galloper was a great team effort with the main contractors: Siemens Gamesa, GE and Petrofac, VBMS, NKT, GeoSea and National Grid."
Galloper is owned by innogy (25%), Siemens Financial Services (25%), Sumitomo Corporation (12.5%), ESB (12.5%) and a Green Investment Group and Macquarie-managed consortium (25%).
Earlier this month, Innogy received planning approval for construction of Galloper’s operations and maintenance (O&M) base at Harwich International Port in Essex, south-east England.