Re: [pvusers] Issue 34 re: EMI from SW4048

["Christopher Moss" <chris@saveonsolar.com>]

Vanner is the way to go ...


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----- Original Message -----
From: "Dan Metcalf" <dan@metcalfs.com>
To: <pvusers@crest.org>
Sent: Tuesday, January 22, 2002 1:59 PM
Subject: Re: [pvusers] Issue 34 re: EMI from SW4048


> As I've heard about the Xantrex / Trace SW series inverters in the past
they
> do put out alot of EMI.  So much that ham radio operators have had
problems
> isolating the noise from their receivers with equipment located nearby
these
> inverters.  I think it has to do with the mini steps they use for
emulating
> a sine wave.  (64 steps for a full wave as I understand it.)
>
> I've also heard that many people use them no problem at all for radio and
TV
> equipment, so that shouldn't be a problem.  For a standard household I
doubt
> there would be much if any problems at all.
>
> Dan Metcalf
> http://solar.metcalfs.com
>
>
>
> ----- Original Message -----
> From: "Brian McMaster" <bmcmaster@swrpc.org>
> To: <pvusers@crest.org>
> Sent: Tuesday, January 22, 2002 10:37 AM
> Subject: [pvusers] Issue 34 re: EMI from SW4048
>
>
> > Dave & Co.
> > I read the following with interest, but limited understanding. I own one
> of these inverters in my unfinished house.  Is this an issue only for ham
> radio enthusiasts, or am I about to experience a world of inteference?
Also,
> will the not-so-true sinewave pattern make a difference for other
electronic
> appliances?
> >
> > I was considering going 48 volts with the house system initially, but
the
> > Xantrex Trace SW4048 inverter emits a large amount of EMI due to its
> stepped
> > sinewave.  The harmonics of those squares edges are detectable well over
> 100
> > feet away with sensitive HF and VHF equipment.
> >
> >
> >
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