Sustainable Energy Technologies Ltd.

Sustainable Energy Technologies Ltd.

December 18, 2009 09:00 ET

Sustainable Energy's SUNERGY Inverters Power Largest Commercial Rooftop Solar PV System in Western Canada

The Ridge Professional Building Highlights Renewable Energy Leadership in Medicine Hat, AB

MEDICINE HAT, ALBERTA--(Marketwire - Dec. 18, 2009) - Sustainable Energy Technologies Ltd (TSX VENTURE:STG) ("Sustainable Energy" or the "Company") announced today the grand opening of the largest commercial rooftop solar PV system west of Toronto. The solar power plant installed atop the Ridge Professional Building utilizes Sustainable Energy's extra-low voltage SUNERGY inverter technology.

The Ridge Professional Building located in Medicine Hat, AB now has a 30 kilowatt rooftop PV system that will supply approximately 50 percent of the building's electrical needs. Using solar PV modules from Day4 Energy of Burnaby, B.C. along with Sustainable Energy's SUNERGY inverter technology, this Western Canadian technology-powered system will produce 40 megawatt hours a year for the progressive business center.

"The opening of the Ridge Professional Building's rooftop solar PV system is a huge landmark for Western Canada and is a testament to the growing adoption of renewable energy," said Robert Bucher President & CEO of Sustainable Energy. "We are pleased to provide our safe and efficient inverter technology to this ground-breaking project and expect to see more jurisdictions establish guidelines similar to those in Medicine Hat that will encourage further adoption of renewable energy."

The SUNERGY distributed inverters offer cost, performance and safety advantages over high voltage inverters for rooftop solar PV systems:

  • SUNERGY inverters are rated for operation in temperatures ranging from minus 40 degrees C to plus 50 degrees C, allowing them to be mounted on rooftops anywhere in the world. Outdoor mounted inverters avoid the problem of live DC voltage from the solar panels remaining inside the building, even after utility power is disconnected. Traditional inverters are mounted indoors and can operate at voltages as high as 600V presenting a safety hazard.
  • In addition to preventing the intrusion of DC voltage into the building, SUNERGY inverters have enabled the installation at Medicine Hat to operate below 120V DC, minimizing the risk to firefighters and other personnel accessing the rooftop.
  • Patented SUNERGY multiple power point tracking and the elimination of module mismatch losses generate power yield improvement of 3 percent to 5 percent over high voltage products. In congested rooftop applications, energy yield can be improved as much as 15 percent.
  • Roof mounted, low voltage inverters mean higher system availability throughout the year and simpler, lower cost of maintenance which can be carried out by local trades without relying on manufacturer personnel. 

"We could not have asked for a smoother installation process. Sustainable Energy's inverter technology naturally complied with Medicine Hat's interconnection rules and we were able to address the City's safety concerns without sacrificing cost or performance," said Rick Dunsmore, President of Goose Creek Renewable Energy, who designed and installed the system. "Safety is absolutely the highest priority for all of our installations, both during the installation process and for the life of the system. Manufacturers need to incorporate these types of solutions into their product design to ensure a safe, high quality installation every time."

About Sustainable Energy: Sustainable Energy ( designs, manufactures and distributes power inverters for grid-connected solar PV systems. Advanced power inverters are a critical enabler of all modern solar PV power systems converting the direct current ("DC") power output of the solar PV modules into the high quality alternating current ("AC") power required by the power grid. Advanced power inverters also optimize the performance of the solar PV modules and maintain the integrity and safety of the interconnection with the power grid.

In rooftop applications, the extra low operating voltage of the SUNERGY platform enables a system architecture that is inherently safe and that can be installed and maintained by most building trades without the need for PV specialists, significantly reducing the installed system cost and increasing investor yields.

In ground-based applications, multiple SUNERGY inverters offer higher system yield, less downtime and easier installation and maintenance, than larger "central" inverters. For these reasons, multiple smaller inverters like SUNERGY are increasingly displacing central inverters in European ground based applications - where system performance rather than name plate capacity is the driver. 

Sustainable Energy's technologies are the subject of multiple patents issued by and pending with the US Patent and Canadian Patent Offices.

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 impact of our technology on solar PV system performance; and statements concerning the potential for sales in the markets we have entered. 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. 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.

Contact Information

  • Sustainable Energy Technologies Ltd.
    Michael Carten
    Executive Chairman
    (403) 508-7177 #111
    Sustainable Energy Technologies Ltd.
    Robert Bucher
    President & CEO
    (416) 642-5616
    Media Contact:
    Borders + Gratehouse
    Emily Borders
    (415) 963-4174 ext 1