Wal-Mart draws more solar power than 38 U.S. states

Wal-Mart Stores Inc. (NYSE: WMT) is converting more sun into energy than 38 states and has twice as much commercial solar power as competitor Costco.

According to Bloomberg, most of Wal-Mart's projects are done through what are called power-purchase agreements, where third-party developers install, own and operate the systems on Wal-Mart rooftops. The company then buys back the electricity.

Wal-Mart currently draws on 89 megawatts of capacity, roughly enough to power 22,250 U.S. homes, Bloomberg reports.

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