The Denver-based fast-casual chain said Tuesday that it is partnering with Houston-based Standard Renewable Energy to install enough panels to produce 500 kilowatt hours of electricity.

Installations are already under way in Denver and in Texas, in Austin, Dallas and San Antonio.

Chipotle says the goal is to reduce how much traditional energy the restaurants use from 11 a.m. to 7 p.m., when demand for energy is greatest.

Chipotle has had other "green" initiatives. Its restaurant in Gurnee, Ill., has a wind turbine on site and an underground cistern to harvest rainwater for irrigation.

A service of YellowBrix, Inc.