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

["Jeffery Green" <jeff_green@msn.com>]

 

Hi

For those of us already on Xantrex inverters, are there any filters for these problems. It seems there would be a bandwidth of noise that could be filtered out. What is the band the inverter creates in emi and what kind of filter could be used to dispose of it.

Jeff Green

----- Original Message -----

From: Christopher Moss

Sent: Tuesday, January 22, 2002 4:45 PM

To: Dan Metcalf

Cc: pvusers@crest.org

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

 

Vanner is the way to go ...


Warm Regards,

Christopher Moss
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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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