Array Technologies’ DuraTrack HZ Tracking System Largest Solar Installation in the Country

8.2 MW Alamosa, CO site fully operational

Albuquerque, NM – 12/12/07 – Array Technologies, in partnership with EPC and owner SunEdison, has announced  the completion of the largest utility solar installation in the United States to date. The 8.2 MW site, located in Alamosa, CO., will generate enough clean energy to power 1,500 homes while offsetting carbon emissions equal to driving 765 million miles over the 20 year lifetime of the project.

The site was a pioneer for Array Technologies’ new DuraTrack HZ™ tracking system, which has been engineered for high performance and reliability and designed with a minimization of materials to generate a maximum return on investment for utility-scale projects. The DuraTrack HZ™ system utilizes articulating drivelines and a rotating gear drive system that allows for ease of installation on undulating terrain or within irregular site boundaries, and uses the fewest motors per MW of any tracking system on the market.

The project is the first major solar plant to host the new DuraTrack HZ™ system, on the heels of Suntech’s introduction of its Reliathon Utility Solar platform optimized for Array Technologies’ tracking system. The PV platform is a fully-integrated module solution that has been designed specifically for use on the DuraTrack HZ™ system.

The Alamosa project is located in the sprawling San Luis Valley of southern Colorado, where summertime temperatures swing from hot in the day to cold at night, and wintertime lows can reach -50° F. Winds often reach high speeds, necessitating a system that can withstand and reliably operate under such extreme conditions.

The Alamosa site is unique in that it incorporates three types of photovoltaic technologies into its plant: Array Technology’s DuraTrack HZ™ single axis tracking arrays, fixed-mount arrays, and dual-axis tracking arrays with photovoltaic concentrator technology.

The plant is owned and operated by Sun Edison, and the electricity generated from the site will be sold to Xcel Energy as part of a solar power purchasing agreement. The site enables Xcel to expand and diversify its renewable energy profile while offsetting a portion of its carbon emissions with renewable energy credits.

The Alamosa site will help Xcel Energy meet a 20% renewable energy legislative benchmark signed by Colorado Governor Bill Ritter that requires all utilities to generate a fifth of their electricity through renewable sources by 2020.

The solar plant is on roughly 80 acres of land near the substation in Alamosa, Colorado.

About Array Technologies

Array Technologies, Inc., provides unequalled expertise in engineering and manufacturing innovative solar tracking systems for utilities, corporations, and small businesses worldwide. Array’s patented tracker designs have established the standard for cost-effective, robust, reliable, and easy to install tracking solutions. Headquartered in Albuquerque, NM, Array Technologies’ trackers are manufactured in the USA.

About SunEdison

SunEdison LLC is North America’s largest solar energy services provider. SunEdison provides solar-generated energy at or below current retail utility rates to a broad and diverse client base of commercial, municipal and utility customers. For more information about SunEdison, please visit The company headquarters is located in Beltsville, MD.

About Xcel Energy

Xcel Energy (NYSE:XEL) is a major U.S. electricity and natural gas company with regulated operations in eight Western and Midwestern states. Xcel Energy provides a comprehensive portfolio of energy-related products and services to 3.3 million electricity customers and 1.8 million natural gas customers through its regulated operating companies. Company headquarters is located in Minneapolis. More information is available at

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