Whole Foods Market, Austin, Texas, worked with national solar providers NRG Energy, Houston, Texas, and SolarCity, San Mateo, Calif., to increase the number of rooftop solar units on its U.S. stores.

The company aims to install up to 100 additional solar rooftop units, making it what is dubbed as the 25 largest commercial rooftop solar installations in the country.

“This program showcases an exciting step in Whole Foods Market’s efforts to increase support for renewable energy as well as lower energy costs,” says Kathy Loftus, global leader in sustainability for Whole Foods Market. “We strive to live our core values of environmental stewardship, as well as serving and supporting our local and global communities. This project allows us to continue to meet the needs of all of our stakeholders.”

The expanded solar portfolio could increase Whole Foods Market’s solar energy portfolio by up to 400% and will help supply cleaner power to the grid.