A UK water utility is sourcing 30 per cent of its electricity demand from a single offshore windfarm.

Northumbrian Water is taking the energy from Race Bank offshore wind farm, which is owned by Danish energy company Ørsted and located off the English coast at Norfolk.

The two firms have signed a 10-year power purchase agreement – the first offshore wind corporate PPA in Britain. It builds on an existing renewable electricity supply agreement between the companies, which already sees Northumbrian Water utilise power from solar, hydro, gas to grid and anaerobic digestion.

The corporate PPA will deliver approximately 100GWh per year of electricity from the wind farm to Northumbrian Water consumption sites in the North East of England and the counties of Essex and Suffolk, amounting to approximately 1TWh across the 10-year term.

Graham Southall, Northumbrian Water’s group commercial director, said the PPA “aligns perfectly with our sustainability goals and our ambitions of creating a truly cohesive energy management strategy. The long-term stability this brings is fantastic for us, and great news for our customers and stakeholders, because it reduces operational costs without compromising our work.”

Under the agreement, Ørsted will also provide a balancing service of the wind output so that the electricity can be delivered to Northumbrian Water under their existing supply agreement.

Alana Kühne, Head of Corporate PPAs at Ørsted, said: “Northumbrian Water shares our ambitions towards a greener future and are able to benefit from this journey through signing a Corporate PPA from Race Bank.  For Ørsted, this agreement is an important step towards building long-term green partnerships with corporate power customers.”

Race Bank was commissioned last year and has a capacity of 573 MW. It operates on 91 Siemens Gamesa 6 MW turbines.