Sustainable Energy Technologies Ltd (TSX VENTURE:STG) ("Sustainable Energy" or
the "Company") announced today that it has closed on a previously announced
multi-megawatt agreement (See News Release: February 19, 2013) with Prosol
Invest Deutschland GmbH ("Prosol") to supply inverters for Prosol's
Sonnenbatterie ( residential and commercial solar energy
management system.  

Prosol is the market leader in Germany, with market leading distribution
channels, including 15 German regional resellers, four leading European energy
and power supply companies, and one global electronics company based in Japan,
each of which is branding the Sonnenbatterie line of products. 

Commented Christoph Ostermann, Managing Director for Prosol. "We expect to
maintain our position as German market leader and a approx. 40% market share
based on a strong distribution network and our superior product, which is
trusted by our customers and OEM partners, including market leaders, RWE, E.ON
and Kyocera."  

"We are partnering strategically with Sustainable Energy because it has the best
"smart grid" energy storage inverter in the market; and because of Sustainable
Energy's commitment to innovation and quality, which are also core values for

Sustainable Energy's patented technology seamlessly connects all low voltage
batteries to the power grid in a single, bi-directional conversion step,
eliminating the complexity and component count needed with conventional high
voltage solar inverters. Unlike other low voltage inverters, the Company's
inverter has been designed from the outset to meet tough European smart grid
connectivity standards (VDE 4105) and is able to do so with conversion
efficiencies that are superior to any product in the market.  

Commented Michael Carten, CEO of Sustainable Energy: "We are excited about our
partnership with Prosol. Sonnenbatterie is a sophisticated consumer product
which optimizes the advantages of our low voltage inverter to achieve cost and
performance results that are unmatched by competitors. This is an important
milestone for Sustainable Energy as we shift our focus to the energy storage

The first Sonnebatterie products using Sustainable Energy's inverters will be
rolled out to the Prosol distribution network later this month and launched at
the Inter-Solar trade show in Munich, Germany from June 19-21, 2013. 

About Prosol Invest Deutschland GmbH 

Based near Kempten Germany, PROSOL Invest Deutschland GmbH is the German market
leader for intelligent lithium based storage systems and has many years of
experience with battery storage technologies and renewable energies. 

Sonnenbatterie is a highly intelligent lithium based solar storage system, which
is much more than just a battery. Sonnenbatterie includes various added values
such as smart home, smart meter and solar PV monitoring. Sonnenbatterie is
available in various system sizes to perfectly cover the demand of small family
to high end houses and small to medium-sized companies or farms. It is ideally
suited to retrofit existing PV systems as well as for new installations. On
average, the users of Sonnenbatterie consume more than 75% of their self
generated electricity. The technology is not only extensively tested, but has
also proven its functionality and reliability in the field since 2010.

About Solar Energy Storage 

The solar energy storage market is about to explode and will grow to a $19B
annual market by 2017 says London based IHS Research, led by Germany which has
just announced a financial package consisting of low interest rate long term
loans and capital subsidies. According to IHS Research, solar energy storage
will be economic, even without subsidies, even in countries like the United
Kingdom where the sector is expected to take off in 2014. 

New high efficiency low maintenance batteries - typically, but not exclusively,
Lithium based - are enabling solar produced during the day to be stored and used
during peak periods. Strategic use of energy storage is crucial to Europe
meeting its target to have 20% of all electricity supplied by renewable sources
by 2020; and at the same time to increase grid capacity by up to 66% according
to Germany's Fraunhofer Institute 

About Sustainable Energy 

Sustainable Energy ( 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 bi-directional low voltage energy storage inverter directly
connects low voltage batteries to the grid with the power industry's highest
round trip (battery charging and discharging) efficiencies. The inverter meets
tough utility smart grid standards such as Germany's VDE 4105 which is becoming
a global standard and enables full utility control over the battery dispatch and
power quality functions 

The inverter's software configurable platform has been designed from the ground
up to be easily integrated into power management systems, with the industry's
only open industry standard communications software to support a highly cost
competitive OEM strategy and allowing rapid development of OEM partner product

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 value of future demand for energy storage inverters;
statements concerning the efficiency and cost advantages of our energy storage
inverters; statements concerning the Sonnenbatterie product and statements
concerning Prosol's market share expectations. 

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
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

Sustainable Energy Technologies Ltd.
Michael Carten
Chief Executive Officer

Investor Contact:
Alliance Advisors, LLC
Valter Pinto

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