October 2009
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EMerge Alliance Announces First DC Power Standard for Commercial Buildings

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Standard improves energy efficiency, offers integration of on-site alternative power generation

SAN RAMON, CALIF. (Oct. 13, 2009) – Delivering an innovative platform for unprecedented flexibility, sustainability and energy efficiency in commercial buildings, the EMerge Alliance today announced the release of the EMerge Alliance Standard, the first roadmap for the utilization of safe, low-voltage direct-current (DC) power in commercial interiors.

The new industry standard allows buildings of today to adapt to the needs of tomorrow by defining critical physical and electrical requirements that help achieve the following goals:

Reduced energy losses by eliminating device-by-device electrical conversions from alternating-current (AC) power to DC power
Use of safe Class 2 power levels, wherever practical, as defined by the National Electrical Code
Broad capabilities for faster and simpler moves, adds, and changes in occupied spaces
Movement towards interoperable device-level controls and smart grid integration at the building level
Easier integration of native DC power sources, such as solar, wind, fuel cell and batteries, with traditional AC power sources
Flexibility to implement new energy-saving devices, such as LED lighting and controls, and energy-saving technologies, such as renewable power sources, more efficiently and effectively


The EMerge Alliance Standard establishes a more efficient means of powering the rapidly increasing number of digital, DC-powered devices, such as sensors, lighting and IT equipment, found in today’s workplaces. It creates an integrated, open platform for power, interior infrastructures, controls and a wide variety of peripheral devices to facilitate the hybrid use of AC and DC power within buildings. In the standardized scheme, AC power is converted to low-voltage DC for efficient distribution at the room level, eliminating the inefficiency of numerous AC to DC power conversions at the device level.

The Standard also provides for an optional connection to on-site alternative power generation, including solar panels and micro-turbines that naturally generate DC power. Historically these native DC power generators required their power to be converted to AC for local distribution, reducing their efficiency and increasing costs. Using native DC power generated from on-site sources to drive DC loads more directly can dramatically improve building efficiency, reduce energy costs and reduce environmental footprints.

Throughout development of the Standard, the EMerge Alliance incorporated technology requirements and contributions from a wide variety of industry stakeholders, including leading product manufacturers, service providers, utility companies, and technology integrators. According to Alliance Chairman Brian Patterson, the Standard is a pivotal milestone for the entire building industry.

CatNet Systems "The EMerge Alliance Standard sets the stage for a new era in power sourcing, distribution and management in commercial buildings,” said Patterson. “While we advocate increased use of native DC power, the Alliance is not interested in reliving the epic Edison and Westinghouse battle over AC versus DC technologies. Rather, we’ve set out to find better and more practical ways of getting the most out of both.”

The Alliance is establishing a third-party registration and evaluation program for labeling products based on the Standard. This program will benefit Alliance members, system specifiers and building owners by ensuring a variety of products will be available from the growing EMerge Alliance membership base and that all products will be easily identifiable in the market. The program is scheduled to begin this fall.

A public overview version of the Standard and answers to frequently asked questions are available at www.EMergeAlliance.org. The full EMerge Alliance Standard is available to Governing, Participating and General Members of the Alliance. To join the Alliance, please visit http://emergealliance.org/en/join/index.asp

About the EMerge Alliance

The EMerge Alliance is an open industry association leading the rapid adoption of safe, low-voltage DC power distribution and use in commercial interiors through the EMerge Alliance Standard. This innovative standard integrates interior infrastructures, power, controls and peripheral devices in a common platform to facilitate the hybrid use of AC and DC power. Now, building owners can gain unprecedented design and space flexibility along with greater energy efficiency and improved sustainability. The not-for-profit Alliance is accepting new members at various levels. For more information, please visit www.EMergeAlliance.org

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