Dairy giant Dale Farm has said the launch of its Co Tyrone solar farm marks a "milestone" in sustainability for the sector.
The project at its cheese proceesing site in Dunmanbridge is to "guarantee" 20 years of green energy for the company and is one of the biggest of its kind worldwide.
The plant is now powered by the solar farm, which was delivered by CES Energy in Dublin.
Chris McAlinden, group operations director at Dale Farm, said: "Dale Farm is committed to leading the way in sustainability with a strategy that sees us constantly assessing our processes and facilities to identify how we can reduce our carbon footprint and increase efficiency.
"This approach is about doing the right thing for the environment and ultimately making our business as lean as it can be, so we can pay our farmer owners the best possible price for their milk.
"We are extremely proud to have developed a green energy solution that positions our operations at the vanguard of sustainability, not just in dairy in Ireland, but worldwide."
Tom Marren, chief executive of CES Energy, added: "For companies like Dale Farm, maximising sustainability is key to leading the way in social responsibility.
"At the same time, it makes business sense, as retailers are strengthening their demands on producers and suppliers like Dale Farm, calling for them to be carbon neutral."
Dale Farm brands include Spelga yoghurt and Fivemiletown Cheese.