A major strength of renewable energy is its ability to generate power at the site of customers, whether they be residential or commercial accounts.
Using biogas, wind, and solar on-site at their facilities, Walmart generates more than 174 million kilowatt-hours of electricity and ranks first in the nation for on-site, renewable energy generation.
http://www.energymanagertoday.com/epa-names-partners-with-most-on-site-power-088626/?utm_source=el&utm_campaign=homefeed&utm_medium=link. Walmart also purchases another 574 million kilowatt-hours of electricity from renewable energy generators that are not located at their facilities.
Walmart's total renewable electricity usage is approximately 750 million kilowatt-hours or enough power for 75,000 homes.
Interestingly, BMW ranks second in the on-site use of renewable energy, with more than 70 million kilowatt-hours from biogas. The rest of the top on-site renewable energy generators can be seen at the link.