10 massive corporations going big on solar power

American businesses are investing record amounts in solar, with the top corporate users adding 325 megawatts (MW) of installed capacity last year, according to the "Solar Means Business 2017" report from the Solar Energy Industries Association (SEIA).

The impact of corporate solar is significant: the solar installations analyzed in the SEIA report produce enough electricity to power 402,000 U.S. homes and offset 2.4 million metric tons of carbon dioxide each year.

Here, CNBC's Sustainable Energy looks at the top 10 corporations in the U.S. by their installed capacity of solar power.

  • 10. Amazon.com — 33.6 MW

    Lisa Werner | Moment Mobile | Getty Images

  • 9. Macy's — 38.9 MW 

    As well as having installed almost 40 MW of solar capacity, Macy's wants to increase the amount of its waste diverted from landfills to 70 percent by this year.

    Bruce Leighty | Photolibrary | Getty Images

  • 8. IKEA — 44.9 MW

    By 2020, the IKEA Group wants to produce as much renewable energy as it consumes in its operations. On its website, the business says it wants to source all its wood from more sustainable sources, also by 2020.

    Steve Proehl | Corbis Documentary | Getty Images

  • 7. General Growth Properties — 50.2 MW

    Real estate business General Growth Properties describes sustainability as "an integral component of GGP's long-term success."

    Raymond Boyd | Michael Ochs Archives | Getty Images

  • 6. Costco Wholesale — 50.8 MW

    jetcityimage | iStock Editorial | Getty Images

  • 5. Kohl's — 51.5 MW

    Robert Kirk | Moment Mobile | Getty Images

  • 4. Apple — 79.4 MW   

    Josh Edelson | AFP | Getty Images

  • 3. Prologis — 120.7 MW

    Gina Ferazzi | Los Angeles Times | Getty Images

  • 2. Walmart — 149.4 MW

    Walmart To Raise Its Minimum Raise To 11 Dollars An Hour
    Scott Olson | Getty Images

  • 1. Target — 203.5 MW

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    Steve Proehl | Corbis Documentary | Getty Images