World's First Megawatt PEM Electrolyzer for Power-to-Gas Facility

MISSISSAUGA, Ontario, April 8, 2013 -- Hydrogenics

Corporation (Nasdaq:HYGS) (TSX:HYG), a leading developer and manufacturer of
hydrogen generation and hydrogen-based power modules, today announced that
it has been awarded a 1 megawatt hydrogen energy storage system to be
deployed in the City of Hamburg, Germany.

Hydrogenics' energy storage application will employ advanced proton exchange
membrane ("PEM") technology for production of the hydrogen, using excess
power generated from renewable energy in the region, primarily wind. This
"Power-to-Gas" facility will be run by E.ON, a global provider of innovative
energy services and an existing customer of Hydrogenics. In the core of the
system will be the world's largest single PEM electrolyzer stack, which will
serve as the building block for future multi-megawatt applications.

"This is another exciting milestone both for Hydrogenics and the energy
storage industry in general," said Daryl Wilson, President and CEO of
Hydrogenics. "Sites such as this E.ON facility will allow Germany to more
efficiently use the large amount of renewable energy generated from wind and
solar power, which can fluctuate dramatically due to environmental
conditions. Hydrogen-based energy storage systems can absorb surplus energy
as needed, return power when required, alleviate grid instability, and
improve overall utility performance. In addition, the hydrogen produced can
be stored in large quantities over long periods of time within the country's
natural gas infrastructure. Using our technology, Hamburg will have the most
advanced Power-to-Gas facility in the world and the largest PEM electrolysis
installation producing hydrogen. We are pleased to be working once again
with E.ON on this groundbreaking project, having just delivered our first
energy storage equipment to them in December, 2012."

Construction of the plant, backed by a consortium of German companies and
scientific organizations, is expected to begin during the second quarter of
2013. Funding has been provided by Germany's National Innovation Program
(NIP) for hydrogen and fuel cell technology, under the auspices of the
country's Federal Ministry of Transport, Buildings and Urban Affairs in
coordination with the National Organization for Hydrogen and Fuel Cell
Technology (NOW).

E.ON is the holding company of the world's largest investor-owned electric
utility service provider, based in Dusseldorf, North Rhine-Westphalia,
Germany. It operates in over 30 countries and serves over 26 million
customers.

About Hydrogenics

Hydrogenics Corporation is a world leader in engineering and building the
technologies required to enable the acceleration of a global power shift.

Headquartered in Mississauga, Ontario, Hydrogenics provides hydrogen
generation, energy storage and hydrogen power modules to its customers and
partners around the world. Hydrogenics has manufacturing sites in Germany,
Belgium and Canada and service centers in Russia, China, India, Europe, the
US and Canada.