On March 28, 2006, we announced that production delays in our OnSite Generation business unit would cause near term revenue expectations to be lower than previously anticipated as a result of supply chain component quality issues. Accordingly, over the course of the second quarter, we implemented standardized, rigorous quality testing protocols to address these issues in our Belgian OnSite Generation group. We have now identified other operational and production quality issues which we are addressing through appropriate corrective measures. In order not to adversely affect our customer base, we are continuing to remediate these recently identified issues. Accordingly, we will not resume normal activities in our OnSite Generation business unit until all production quality issues are adequately resolved. While we continue to be optimistic that deliveries will return to historic levels in the latter part of the fiscal year, we cannot be definitive as to timing.

In order to remediate certain deployed units, we determined it is necessary to accrue a $1.8 million charge for estimated future warranty costs, the majority of which is attributable to units delivered prior to acquisition of Stuart Energy Systems Corporation in January 2005.

The Company anticipates that revenues for the second quarter of 2006 will approximate $5.4 million as follows: OnSite Generation $1.6 million; Power Systems $1.0 million; and Test Systems $2.8 million.

"While the operational and quality issues in our OnSite Generation business unit are challenging, we are committed to taking all steps necessary to ensure that we deliver the highest quality products to our customers. We are appreciative of the confidence displayed by our customers as evidenced by our growing order backlog," said Pierre Rivard, President and Chief Executive Officer of Hydrogenics Corporation.

Hydrogenics will release its second quarter financial results on August 8, 2006 prior to market opening. In conjunction with the release of second quarter results, management will host a conference call and webcast at 10:30 a.m. (EST) on August 8, 2006. Participants should dial (416) 695-9753 to access the conference call or visit our website www.hydrogenics.com at least 15 minutes early to register for the webcast. The webcast and a downloadable MP3 will be available following the conference call on the company website.

About Hydrogenics:

Hydrogenics Corporation (http://www.hydrogenics.com) is a leading global developer of clean energy solutions, advancing the Hydrogen Economy by commercializing hydrogen and fuel cell products. The company has a portfolio of products and capabilities serving the hydrogen and energy markets of today and tomorrow. Hydrogenics, based in Mississauga, Ontario, Canada, has operations in North America, Europe and Asia.