Batteryless inverter recommendation [RE-wrenches]

[Joel Davidson]

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Hi John,

You and I have always agreed that quality has its price, but is it possible 
for 2 to 5 kW inverter prices to come down 20% and still have high 
reliability? What can installers do (in addition to following installation 
instructions, mounting inverters out of the sun, and keeping DC wire loss 
below 1.5%) to increase reliability and reduce call-backs?

Best regards,
Joel Davidson

----- Original Message ----- 
From: "John Berdner"
To: <RE-wrenches at topica.com>
Sent: Friday, February 29, 2008 12:49 PM
Subject: RE: Batteryless inverter recommendation [RE-wrenches]


>
> Joel/Mark:
>
> Our US series products (our current product offering) we utilize active
> cooling thought our Opti-cool enclosure.  The enclosure is painted die
> cast aluminum and is divided into two sections. All external hardware is
> stainless steel.
>
> The sensitive electronics are in the front chamber which is rated NEMA
> 4X (fully gasketed and corrosion resistant).  We also conformal coat the
> circuit boards even though they are not exposed to ambient air.  The
> rear chamber is rated NEMA 3R and encloses only the heat sink, the
> transformer, and the inductors.   All the magnetics in the NEMA 3R
> chamber are fully encapsulated (not just coated) in epoxy for corrosion
> resistance.  The fans that are used are sealed units rated for outdoor
> use (NEMA 3R).  The fans are speed controlled for long life and to keep
> noise and vibration to a minimum.  In normal service the fans should
> last 10 years or more.  If a fan fails the inverter continues to operate
> and the fan can be replaced in the field in under 5 minutes by untrained
> personnel without opening the inverter case.
>
> We believe the Opti-cool enclosure retains the benefits of active
> cooling while avoiding the long term corrosion and reliability problems
> created by blowing ambient air across the sensitive electronics.
>
> Best Regards,
>
> John Berdner


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