STG Stone Gold Inc

Sustainable Energy Technologies (TSX VENTURE:STG), ("Sustainable Energy" or the
"Company"), announced today that it will introduce its breakthrough "bi-direx"
energy storage inverter at the Renewable Energy 2013 Exhibition in Tokyo Japan
(booth R02-018) http://www.renewableenergy.jp/english/index.html), July 24 - 26,
2013.


Bi-direx is a bi-directional smart grid inverter designed specifically to
connect low voltage battery and fuel cell systems to the power grid with very
high conversion efficiencies. Sustainable Energy's business model is to partner
strategically in high growth markets to create high value added energy storage
solutions for smart grid and micro-grids by delivering a software configurable
platform that allows maximum control over inverter functionality to simplify
system design, reduce cost and maximize speed to market.


In Europe, the bi-direx inverter is powering the market leading Sonnebatterie by
Prosol Invest Deutschland GmbH, which was recently introduced to the North
American market at Intersolar North America in San Francisco July 9 - 11 2013.
For a presentation on the bi-direx powered Sonnebatterie See:
www.eguanatech.com/images/pdf/Energy-Storage_Solarbattery.pdf


"We are excited with the very positive industry feedback on the bi-direx
platform at Intersolar North America," said Michael Carten CEO of Sustainable
Energy. "We are on plan in Europe with a very strong partnership, and the
Intersolar outcomes look to put us ahead of plan for North America." 


About Sustainable Energy

Based in Calgary Alberta Canada, Sustainable Energy (www.SustainableEnergy.com)
designs and manufactures advanced power electronics for distributed smart grid
and micro-grid applications. Advanced power electronics are a critical interface
between all distributed generation and storage systems devices, ensuring the
delivery of high quality alternating current (AC) to the power grid as well as
providing utility control over the interconnection and power quality. 


Sustainable Energy's platform is based on patented breakthroughs in power
inverter design that enable its platform to convert high current/low voltage DC
into high quality AC with conversion efficiencies that are materially higher
than anything in the market with an inherently lower cost structure. 


Forward Looking Information

The reader is advised that some of the information herein may constitute
forward-looking statements within the meaning assigned by National Instruments
51-102 and other relevant securities legislation. In particular, we include:
statements concerning the feature of our bi-direx inverter and statements
concerning the market position of the Sonnenbatterie energy management system. 


Forward-looking information is not a guarantee of future performance and
involves a number of risks and uncertainties. Many factors could cause the
Company's actual results, performance or achievements, or future events or
developments, to differ materially from those expressed or implied by the
forward-looking information. Readers are cautioned not to place undue reliance
on forward-looking information, which speaks only as of the date hereof.


Readers are also directed to the Risk Factors section of the Company's current
Annual Information Form which may be found on its website or at www.sedar.com
The Company does not undertake any obligation to release publicly any revisions
to forward-looking information contained herein to reflect events or
circumstances that occur after the date hereof or to reflect the occurrence of
unanticipated events, except as may be required under applicable securities
laws.


Neither the TSX Venture Exchange nor its Regulation Services Provider (as that
term is defined in the policies of the TSX Venture Exchange) accepts
responsibility for the adequacy or accuracy of this release. 


FOR FURTHER INFORMATION PLEASE CONTACT: 
Sustainable Energy Technologies Ltd.
Michael Carten
Chief Executive Officer
403.630.9544
Michael.Carten@sustainableenergy.com

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