Constellation has a PPA with developer Enel Green Power (EGP).
The Italy-based developer is building the 185MW HillTopper project in Illinois, which is due online this year.
Sports and entertainment company Comcast Spectacor, which owns the Wells Fargo Center, will buy power produced from a 9MW portion of the project from Constellation.
Construction at HillTopper started in April and it is due to be commissioned by the end of this year. The project is subject to several other PPAs.
Business and financial news company Bloomberg will also buy power from a 17MW portion of the site, while Enel has agreed to sell power generated from 100MW to car manufacturer General Motors (GM).
Enel Green Power is in active discussions with potential offtakers for the sale of power from the remaining 59MW, a spokesman told Windpower Monthly.
The Wells Fargo Center hosts the Philadelphia Flyers from the National Hockey League (NHL) and the Philadelphia 76ers from the National Basketball Association (NBA) as well as operating as a music concert venue.