Mainstream is currently building the project, which is located in Leitrim in the North West of Ireland, and it is expected to be operational in early 2014. IKEA will take ownership of the facility at that time.
As part of the deal Mainstream will continue operate and maintain the wind farm on behalf of IKEA for its 20-year lifespan.
"Mainstream Renewable Power is delighted to be partnering with IKEA, a true world leader in corporate sustainability," said Mainstream Renewable CEO Eddie O'Connor. "Partnering with corporations who want to own wind and solar plants is a very exciting and growing part of Mainstream's global business."
Of IKEA, he said, "Owning wind and solar plants makes a lot of sense for them on a number of levels. As the cost of the fuel is free, the more of it they have the more stability and certainty they have in relation to their energy costs in the long-term. On top of that the more forward-thinking corporations are investing in wind and solar energy as part of their sustainability strategy, and IKEA is a fantastic example of this."
The IKEA Group plans to invest £1.5 billion in wind energy and solar programmes by 2015. Wind energy is a key part of IKEA Group's sustainability strategy to generate as much renewable energy as it consumes by 2020.
This acquisition will increase the total number of wind turbines that the IKEA Group has committed to owning and operating to 137.
"Our investments in renewable energy not only help to reduce carbon dioxide emissions from our operations in Ireland, but also, together with our energy efficiency efforts, help to control our electricity costs," said Joanna Yarrow, Head of Sustainability IKEA UK and Ireland.
By controlling those costs, she said, IKEA can pass those savings on to its customers.
"Companies, individuals or governments - we all have responsibility to address the resource dilemma and commit to a more sustainable future," Yarrow continued. "Producing our own affordable, renewable electricity gets us one step closer to becoming completely energy independent by 2020, while ensuring our commercial success."
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