On Monday, Microsoft announced its largest purchase of wind energy to date with the signing of two agreements. Combined, these agreements represent 237 megawatts of wind energy, which brings Microsoft’s total investment in wind energy projects in the U.S. to more than 500 megawatts. "Microsoft is committed to building a responsible cloud, and these agreements represent progress toward our goal of improving the energy mix at our datacenters," said Brad Smith, president and chief legal officer at Microsoft. "Our commitment extends beyond greening our own operations because these projects help create a greener, more reliable grid in the communities in which we operate."

Microsoft has contracted with Allianz Risk Transfer (ART) to fix its long-term energy costs and purchase the environmental attributes connected with the new, 178-megawatt Bloom Wind project in Kansas. The project is the first to use a novel structure developed by ART and designed to offset high upfront costs associated with the creation of large-scale wind projects. Microsoft is the first buyer to participate in this structure, which has the potential to bring clean energy projects online at a faster pace.

In addition, Microsoft has contracted with Black Hills Corp. subsidiary Black Hills Energy, under a long-term agreement, to purchase 59 megawatts of renewable energy certificates from the Happy Jack and Silver Sage wind projects, which are adjacent to Microsoft’s Cheyenne, Wyoming, datacenter. The combined output of the Bloom and Happy Jack/Silver Sage projects will produce enough energy on an annual basis to cover the annual energy used at the datacenter.

Microsoft and Black Hills Energy also worked together to create a new tariff, available to all eligible customers, that allows the utility to tap the local datacenter’s backup generators, thereby eliminating the need for Black Hills Energy to construct a new power plant. The tariff received approval from the Wyoming Public Service Commission in July.

These are Microsoft’s third and fourth wind energy agreements, joining the 175-megawatt Pilot Hill wind project in Illinois and 110-megawatt Keechi wind project in Texas. In March, Microsoft also signed an agreement with the Commonwealth of Virginia and Dominion Energy Inc. to bring 20 megawatts of solar energy onto the grid in Virginia. These projects are in addition to the renewable and carbon-free energy Microsoft purchases from the grid mix in the markets in which it operates.