Fort Huachuca has dedicated one of the largest solar-energy farms in the U.S. military, a 68-acre, 17.2 megawatt photovoltaic array owned and operated by Tucson Electric Power.

Completed in December and dedicated on Wednesday, the array produces enough power to satisfy one-quarter of the Army post’s energy needs, equivalent to the annual electric usage of about 3,000 homes.

The system will offset approximately 58,000 tons of carbon dioxide per year while reducing other emissions, TEP said.

E.ON, a partner on other TEP solar projects, managed design and construction of the array, which is just east of the post in Sierra Vista.

The system is linked to an existing TEP substation, and any excess output flows back into the company’s local grid for use by other customers.