Batteryless inverter recommendation [RE-wrenches]

[Tom Lane]

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Our company spends a lot time making sure our installers go in mass to SMA 
and Outback trainng programs and to Sunpower- training programs ---more 
training --better trainers  results in  fewer problems    when  you are 
troubleshooting inverters     GatorTom 
Original Message ----- 
From: "Joel Davidson" <joel.davidson at sbcglobal.net>
To: <RE-wrenches at topica.com>
Sent: Friday, February 29, 2008 5:29 PM
Subject: Re: Batteryless inverter recommendation [RE-wrenches]


>
> 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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