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, 9. Macy's — 38.9 MW, 8. IKEA — 44.9 MW, 7. General Growth Properties — 50.2 MW, 6. Costco Wholesale — 50.8 MW, 5. Kohl's — 51.5 MW, 4. Apple — 79.4 MW, 3. Prologis — 120.7 MW, 2. Walmart — 149.4 MW, 1. Target — 203.5 MW.