November 2008 - Walmart Stores Inc. has announced its first substantial wind energy purchase in the U.S. Under an agreement with Duke Energy, the company will purchase approximately 226 million kilowatt-hours (kWh) per year, beginning in April 2009. The purchase commitment, representing about 15 percent of the retailer’s energy load in approximately 360 Texas stores and other facilities, will be sourced from a Duke Energy wind farm currently under construction in Notrees, Texas. In addition to the wind purchase, Walmart also has plans to equip up to 22 locations in Hawaii and California with solar panels.
Press Release - Wal-Mart Makes Major Commitment to Renewable Wind Power
News Article - Wal-Mart To Buy Wind Power From Duke Energy For Texas Stores