EXHIBIT 99.1
press release

For further information contact:
John Hatsopoulos, American DG Energy
Telephone: 781.522.6020

American DG Energy Reports Fourth Quarter and FY 2010 Financial Performance

Energy Revenues increased 40% in the Fourth Quarter

WALTHAM, Mass. – February 15, 2011
– American DG Energy Inc. (NYSE Amex: ADGE), a leading On-Site Utility, offering clean electricity, heat, hot water and cooling solutions to hospitality, healthcare, housing and athletic facilities, reported energy revenues of $1,298,882 in the fourth quarter of 2010, compared to $929,269 in the fourth quarter of 2009, total revenues of $1,375,948 in the fourth quarter of 2010, compared to $1,288,286 in the fourth quarter of 2009 and total revenues of $5,634,765 for the full year in 2010, compared to $5,763,827 in 2009. GAAP diluted loss per share (EPS) was $(0.04) in 2010, compared to $(0.07) in 2009, and GAAP operating income was a loss of $(1,681,703) in 2010, compared to a loss of $(1,954,072) in 2009.

Major Highlights in the Fourth Quarter and FY 2010:

 
·
In the fourth quarter of 2010 energy revenue increased by 39.8% to $1,298,882 compared to $929,269 for the same period in 2009 and energy gross profit margin without depreciation increased to 33.4% primarily due to the additional energy systems and the increased hours of operation of our fleet.
 
·
For the year, energy revenue increased by 8.9% and energy gross profit margin without depreciation increased to 37.0% primarily due to the additional energy systems added to the fleet, the efficient operation of our energy systems, increased chilled water or cooling revenue, and the lower price of natural gas. The natural gas price, a key component in calculating our hot water revenue, was considerably lower in 2010 compared to 2009.
 
·
We added 14 new energy systems in 2010 bringing the total number of energy systems operating to 76 compared to 62 in 2009. The total value of our current On-Site Utility energy agreements is approximately $152 million.
 
·
Our current backlog consists of 9 energy systems.
 
·
We received $451,603 in rebates and incentives in 2010.
 
·
We finished the year with approximately $4.0 million in cash, cash equivalents and short-term investments.
 
·
In February we called the $5.3 million outstanding balance of our 8% senior convertible debentures, all of which was converted into shares of common stock.
 
·
We joined the Russell 3000Ò Index in June, which measures the performance of the largest 3,000 U.S. companies, representing approximately 98% of the investable U.S. equity market.
 
·
In June we reached an agreement to supply clean energy to Doral Arrowwood Hotel and Conference Center in Rye Brook, New York using a 375 kW combined heat and power system.
 
·
In December we expanded our fleet of combined heat and power and chiller systems to six at Stevens Institute of Technology, a premier technological university in Hoboken, New Jersey.
 
·
We raised $2.3 million from the sale of common stock of EuroSite Power Inc., a subsidiary whose business focus is to introduce the On-Site Utility solution to the United Kingdom and Europe.
 
·
In addition to the EuroSite Power Inc. offering, we raised $2.7 million for American DG Energy from accredited investors.
 
·
We shipped our first energy system to the United Kingdom in December.
 
·
We added Ms. Deanna M. Petersen, Vice President of Business Development for Shire Human Genetic Therapies and Mr. Frank Mlynarczyk, the chief executive officer of Scarsdale Equities LLC as new members to our Board of Directors.

-more-

 
 

The following information was filed by American Dg Energy Inc (ADGE) on Tuesday, February 15, 2011 as an 8K 2.02 statement, which is an earnings press release pertaining to results of operations and financial condition. It may be helpful to assess the quality of management by comparing the information in the press release to the information in the accompanying 10-K Annual Report statement of earnings and operation as management may choose to highlight particular information in the press release.

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