Re: [pvusers] The Exceltech Pure Sine waveform is really good

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

Yes, I do have an Exeltech XP1100 and love it dearly!  The sine wave on my
oscilloscope looks the same as the grid, clean and pure.

I have noticed no feedback noise from the unit, even with radio equipment
located at about 4 feet.

For ambient noise most of the time it just sits there.  You'd have to listen
carefully to hear the little hum it has going.  Now, when the unit heats up
with sufficient load the high speed cooling fan kicks on until it cools down
again.  (The first 3 months I had it I thought the fan was broken because it
never kicked in to the point that spider set up home on the fan, when summer
came to Los Angeles the fan started running.)  I don't have a decibel meter,
but it's not loud at all.  I don't hear it in the house and when outside
with the door to the power shack closed I don't really notice it.  I'd say
that it's close to the sound of a good PC server fan (not the drives and
such, just the fan) when running.

For reliability, the only problem I've had was a blown fuse.  Wasn't sure if
it was something more serious, so sent it off to Exeltech for diagnosis and
they replaced the fuse for free.  Great tech support and speedy turnaround.

Dan Metcalf
dan@metcalfs.com
http://www.metcalfs.com
The Sun!  Your source of energy for 5 billion years!
  Free while supplies last!

----- Original Message -----
From: "Scott Willing" <willing@mb.sympatico.ca>
To: <pvusers@crest.org>
Sent: Friday, July 19, 2002 5:10 PM
Subject: Re: [pvusers] The Exceltech Pure Sine waveform is really good


> Oops, another quick question gig,
>
> What kind of acoustic noise do they make? Right off the unit, I mean -
> hmm, buzz, sizzle? Silence plus fan noise?
>
> Thanks,
> -=s
>
>
> On 19 Jul 2002 at 18:43, gig wrote:
>
> > > Further to this, I wondered aloud in alt.energy.homepower recently
> > > if anyone knew of posted pix of Trace, Exceltech etc. waveforms.
> > > I've heard much of the variable-step Trace approach, but I've never
> > > seen either time-domain or frequency-domain outputs from the thing
> >
> > I have seen an oscilloscope output of the Exceltech Pure Sine waveform
> > in real time... it was displayed at the Fredricksburg Solar fair...
> > which I attended... it was really good... so my next inverter purchase
> > will be the Exceltech MX series inverter... which I can add modules
> > to, as my system grows...
> >
> > Gig
> >
> >
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>
>
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