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

["Dan Metcalf" <dan@metcalfs.com>]

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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