DENVER (CBS4) – Colorado’s KEZW has become the largest radio station in the United States to be powered by the sun.

A little under a year ago Entercom Denver and KEZW Studio 1430 AM made a move to reduce dependency on the power grid and showcase the power of renewable energy by installing 40 solar panels in Littleton.

Monthly energy costs have dropped 80 percent.

“I’m thrilled KEZW is leading the way in the use of renewable energy and operating our transmitter with solar power,” KEZW Program Director and host of the Breakfast Club, Rick Crandall said in a statement. “From the timeless music of the 40s, 50s and 60s to our long-time commitment to the veterans of Colorado KEZW is a station steeped in history. Today we make history by using the most advanced 21st century technology to power our signal.”

The station celebrated the transformation on Oct. 19 with a live broadcast from the solar site.