News & Press Releases

PV Powered Announces UL Listing of Residential Solar Inverters
Entire product line passes rigorous utility interactive testing standard

Bend, ORE - March 6, 2007

PV Powered, Inc., a leader in solar power generation technology, today announced at the Power-Gen show that the company's entire line of residential solar inverters has passed the full sequence of testing to the latest version of the UL 1741 standard and has been Listed by Underwriters Laboratories Inc. (UL). This Listing comes well in advance of the mandated effective compliance date of May 7, 2007, after which non-compliant inverters may not bear the Listing mark required for utility grid connection.

"The UL 1741 test standard, updated in November of 2005, includes a more rigorous and comprehensive test suite and also includes the more demanding surge protection requirement defined in IEEE 1547," said Gregg Patterson, PV Powered CEO. "It is our understanding that PV Powered is the first inverter manufacturer to complete all of the testing and achieve UL listing to this more stringent standard."

"PV Powered has shown extraordinary initiative, insuring that their products have completed the certification process well in advance of the May 7, 2007 effective date", said Andrew Kendzior, General Manager of UL's Industrial Products business in North America. "Their entire single-phase residential inverter product line has completed the overall certification program to the new requirements of UL 1741 and is Listed by UL" added Evelyn Butler, Regional Business Manager for UL's Renewable Energy business.

"Testing conducted by UL is recognized as the gold standard by the industry and is emulated by other test houses," added Patterson. "When UL lists a product, customers and installers know that it has been rigorously evaluated. Working directly with UL and testing to the standard that they authored is a key part of our quality assurance program and a milestone on our path to achieving the highest reliability in the industry."

The PV Powered residential inverter family contains five different models ranging in output from 2.5KW to 5.2KW. Today's products represent the result of continuous quality and functional improvement since the first PV Powered inverters were shipped in 2004. "The deeply integrated architecture of PV Powered's solar inverters is critical to our efforts to ship the most reliable products in the market. With 2/3 fewer internal components compared to competitive products, our design approach will deliver the continuous uptime that the market is demanding," added Patterson. "With an expected lifetime of more than 10 years, our latest products will be proven to be the most reliable on the market today."
The most recent improvements to the PV Powered product line include several features focusing on reliability, ease of installation, and performance. A partial list of improvements to the product line is listed below:

  • Improved AC operating parameters including field adjustable trip limits and automated calibration.
  • Certification of a 3-wire AC input which meets the revised UL1741 and allows backward compatibility across the PV Powered product lines.
  • Improved anti-islanding for quieter operation and lower harmonic distortion.
  • Additional enclosure knockouts adding installation flexibility while maintaining a NEMA 3R rating.
  • Improved user interface for easier installation and operation.
  • Improvements in the start up, shut down, and MPPT algorithms have also increased the inverters' energy harvest capability.

  • For more information on Underwriters Laboratories visit

    About PV Powered

    Founded in 2003 and based in Bend, Oregon, the privately funded company designs, manufactures and markets the solar industry's most efficient photovoltaic solar inverter solutions. With thousands of its products in use nationwide, PV Powered brings together one of the most experienced design teams in solar power electronics.

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    Media Contact:

    Bob Patterson
    MKTX, Inc.
    Ph: 503-646-6589