[September 20, 2011]

Ohio Public Utility Commission Study Confirms Echelon Smart Meters are More Accurate than Those Replaced

Echelon Corporation (NASDAQ: ELON) announced today that a recent study, requested by the Public Utility Commission (PUC) of Ohio and conducted by MetaVu, thought leader in sustainability advisory, energy and environmental performance measurement, confirms the precision measurement of Echelon's smart meters in Ohio. Of the meters examined during the test, all were found to be accurate to the American National Standards Institute (ANSI) standards.

Consumer advocacy groups across the U.S. have raised concerns that incorrect and inaccurate data collected by smart meters leads to higher-than-expected utility bills. The testing and verification efforts undertaken by MetaVu demonstrate that Echelon smart meters are accurately and reliably delivering meter data to utilities.

"Not only were the Echelon meters well within the manufacturer's specifications, certified test lab Alliance Calibration found they were much more accurate than the meters being replaced," described Paul Alvarez, leader of MetaVu's utility practice and the Ohio deployment assessment project.

"Meter reliability and accuracy are critical to our customers. We'r proud that many of our customers have reported nearly 100% reliability," said Michael Anderson (News - Alert), senior vice president for utility sales and market development at Echelon. "MetaVu's study affirms our commitment to providing a quality product, and our millions of meters in the field illustrate our customers' trust in Echelon technology."

Echelon will be hosting a webinar with MetaVu and SAIC (News - Alert) on the "True Value of Grid Reliability" September 21, 2011 at 10:00 am Pacific where some of the MetaVu observations will be shared. Register at http://info.echelon.com/go-reliablegrid.com.html. You can also visit Echelon at Autovation in booth 535 September 26 - 28 where they will be giving demos of their ground-breaking Edge Control Node (ECN).

To read the full meter accuracy assessment developed by MetaVu, please visit http://dis.puc.state.oh.us/ViewImage.aspx?CMID=A1001001A11F30B73603I44077.

About Echelon Corporation

Echelon Corporation (NASDAQ: ELON) is the world's leading open-standard energy control networking company. Echelon technologies connect more than 35 million homes, 300,000 buildings and 100 million devices to the smart grid, and help customers save 20% or more on their energy usage. With more than 20 years of experience in energy control, Echelon delivers a wide range of innovative solutions to commercial and electric utility customers. More information about Echelon can be found at http://www.echelon.com.

Echelon and the Echelon logo are registered trademarks of Echelon Corporation registered in the United States and other countries. Other product or service names mentioned herein are the trademarks of their respective owners.

This press release may contain statements relating to future plans, events or performance. Such statements may involve risks and uncertainties, including the risk that Echelon's offerings do not perform as designed or do not offer the expected benefits and savings; and other risks identified in Echelon's SEC (News - Alert) filings. Actual results, events and performance may differ materially. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Echelon undertakes no obligation to release publicly the result of any revisions to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

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