Day4 Energy Announces Signed Agreement with Gebäude-Solarsysteme GmbH (GSS) for Custom PV Product Development

BURNABY, Canada, June 17, 2010 - Day4 Energy Inc. (TSX: DFE), a leading supplier of high performance,
cost-effective solar electric solutions, today announced that
Gebaude-Solarsysteme GmbH (GSS) of Thuringia, Germany, is the second PV
company to join Day4's proprietary manufacturing platform. GSS is the oldest
and a highly respected PV company in Germany, and is focused on development
and sales of roof-integrated PV solutions and other building integrated PV
(BIPV) products. The company has a particularly strong market presence in
France and Belgium where roof integrated PV systems are strongly supported by
the local subsidy programs. This announcement is made today in conjunction
with Day4 Energy's participation this week in the French market solar
conference, Salon des Energies Renouvelables in Paris.

"This deal is an excellent opportunity to introduce and extend the reach
of our Day4 branded products into a new vertical market. As we are
approaching grid parity in many markets, integration of PV technologies with
construction materials will become increasingly important and the overall
BIPV market place is likely to grow rapidly. At the same time France and
particularly the French roof-integrated market is rapidly becoming an
important market within central Europe," said George Rubin, President of
Day4. "Embedding Day4 technology into new product development for GSS clients
such as roofing materials for construction companies and automotive
applications allows us to leverage the presence that GSS has cultivated in
these market segments over the years."

"During our many years of experience in the PV sector we have spent a
considerable amount of time looking at possible new module / cell
technologies that can take our product development process to the next level.
Now we are very excited to combine our product expertise as well as to extend
our previous technology and product portfolio, with the unique and
established Day4 technology, into the Day4 platform," said Mr. Hohne,
Director of GSS.

This is the second license agreement signed by Day4 since the
introduction of this business segment in May. At current market prices and
full capacity utilization the 15MW line is expected to provide over 700,000
Euros per year in royalty revenue to Day4.

About Day4's Manufacturing Technology Solution:

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On April 26, 2010 Day4 announced that it had entered an agreement in
principle to acquire ACI ecotec GmbH &Co. KG ("ACI"), a privately owned
specialized photovoltaic (PV) equipment design and manufacturing company
based in Germany. The combination of the Day4 proprietary and patented
technology and ACI's specialized know-how and equipment allows Day4 to
immediately launch the offering of its highly anticipated turn-key
manufacturing technology solution for production of PV cells and PV modules
based on proprietary technologies developed by Day4. ACI's existing customer
relationships, execution capabilities and solid market reputation provide
Day4 with a unique opportunity to rapidly roll out its manufacturing
technology offering across a wide cross section of PV manufacturers in a
number of key markets. At the same time ACI's manufacturing process and
equipment engineering capabilities will add significant depth to Day4's R&D
team and allow the company to significantly accelerate the development of the
next generations of PV technology.

Based on the patented Day4 Electrode and Guardian technologies, Day4's
manufacturing solution offers PV cell and module producers an opportunity to
reduce their investment and production costs while achieving sustainable
differentiation in highly competitive solar markets by producing one of the
industry's highest performing products that customers around the world have
grown to associate with the highest levels of reliability, energy production
and investment return.

With technological differentiation rapidly emerging as a critical area
for most PV manufacturers, Day4's offering of a turn-key package of
manufacturing technology, proprietary equipment, process, product design and
technology license is a natural evolution of the company's business.

By offering a turn-key Day4 PV cell and PV module manufacturing solution
to the PV industry Day4 is looking to significantly expand the market share
of products based on Day4's proprietary technology in existing as well as new
and emerging markets around the world. Furthermore, Day4 manufacturing
solutions sales are expected to significantly alter the company's revenue
model as manufacturing line integration services and technology royalty
streams associated with the new product offering become an increasingly large
component of the company's revenue mix over time.

About Day4:

Day4 Energy Inc. is a Canadian company dedicated to providing high
performance photovoltaic (PV) solutions for residential, commercial and
utility scale installations. By fundamentally improving on the design and
assembly of solar cells and modules, the Company produces unique PV panels of
high power density, increased lifetime and uncompromised aesthetic
appearance. Day4 partners with international technology leaders to develop
and deliver IEC- and UL-certified solar products to customers around the
world. Day4 is listed on the Toronto Stock Exchange under the symbol "DFE".
For more information, please visit www.day4energy.com.

About ACI-ecoTec GmbH & Co. KG:

ACI-ecotec GmbH & Co. KG located in South Germany, was founded in 1980
and develops, builds, and integrates state-of-the-art production automation
and process equipment for the Photovoltaic industry. This includes precision
robotic work-cells and turn-key production lines for assembly,
micro-assembly, measurement and testing, for the production of Photovoltaic
Wafers Cells and Modules. Products include the ecoSol(R) for the production
of Solar Modules; the ecoContact(TM) for contacting of Thin Film Modules and
Cells; the ecoSplit(TM) for raw wet wafer separation, and a leading
market-share process carrier for solar wafers and cells, the ecoCarrier(TM).
www.aci-ecotec.com

About GSS:

Gebaude-Solarsysteme GmbH (GSS) was established in 1992 and has broad
experience with all current solar technologies. The company has participated
in many innovative projects and has won numerous awards for architectural and
engineering excellence. GSS has become known world-wide, especially for its
BIPV-Products. These products are integrated in USA (New York), Canada and
several European countries.

Forward Looking Statements:

This news release contains forward-looking information. These statements
relate to future events or future performance and reflect management's
current expectations and assumptions. A number of factors could cause actual
events, performance or results to differ materially from the events,
performance and results discussed in the forward-looking statements including
but not limited to the fact that the conditions precedent to the completion
of the proposed acquisition may not be successfully met and the acquisition
may not be completed. These forward-looking statements are made as of the
date hereof and the Company does not assume any obligation to update or
revise them to reflect new events or circumstances.

For further information: Therese Hayes, Head, Corporate Development, Day4
Energy Inc., +1-604-345-6771, thayes@day4energy.com; Justin Lacey, Media
Contact, Day4 Energy Inc., +1-604-297-0444, media@day4energy.com

For further information: Therese Hayes, Head, Corporate Development, Day4 Energy Inc., +1-604-345-6771, thayes at day4energy.com; Justin Lacey, Media Contact, Day4 Energy Inc., +1-604-297-0444, media at day4energy.com