I am back, and a pleasent surprize. [RE-wrenches]

Wed Jun 9 06:54:20 PDT 2004

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Hi all
I have been off line for almost 2 months, I am back. 

I just finished a 5 stack (penta pack?) OutBack
system, in an area that has frequent short power
outages,  The system formally had a two SW 5548s and
very short battery life.  The system was expanded and
I needed to handle 25,000 watt surges and thus the
Outback inverters.  

The surprise was the battery control.  The SWs would
with each outage, from seconds to hours go through a
complete recharge cycle.  The batteries were either
cooked or undercharged, I could not get the settings
correct.  

With the OutBack system, the battery recharge is
varied with the amount of discharge.  I did not know
this until system commissioning.  I was putting the
system through several short and long deliberate
outages for test and discovered the recharge depended
upon the outage.   With less than 2 year battery life
in the previous system, I look forward to a happier
customer.   

Maybe everyone knew this feature, but I am a little
slow sometimes.

Daryl

--- "Tom Elliot, Guffey Energy Works"
<telliot at wagonmaker.com> wrote:
>  
> 
>
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> 
> 
> 
> 
> Kelly,
> 
> From what I understand Plasma TVs, especially very
> large ones (is there any
> other kind?) suck tremendous amounts of energy, as
> high as 800 watts, and
> put outa lot of heat.  What the heck kind of RV
> needs a 50 or 60 inch TV?
> If they've got the money it is possible to buy LCD
> TVs as large as 32 inches
> that consume magnitudes less power.
> 
> One other consideration is that plasma TV sets will
> not work at altitudes
> greater than 6000 or 7000 feet so if they are
> planning on heading up to
> Tahoe or Aspen in their RV they may have problems. 
> I have serious doubts
> about trying to use one on an inverter at all (the
> battery requirements just
> to watch a football game would be incredible) and
> especially on a cheap,
> small square wave.
> 
> This sounds like someone with far more money than
> they need (editorial
> comment)...
> 
> Tom
> 
> 
> ----- Original Message ----- 
> From: "Kelly Keilwitz" <kelly at whidbeysunwind.com>
> To: <RE-wrenches at topica.com>
> Sent: Tuesday, June 08, 2004 1:58 PM
> Subject: Re: Plasma TV on square-wave inverter
> [RE-wrenches]
> 
> 
> 
> 
>
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> 
> Bill,
> I know nothing about plasma TV's (including how much
> they cost). I'll take
> that as a "NO" on the running on square-wave!
> -Kelly
> 
> Bill wrote:
> > Quick question:
> > If you can afford a dang plasma TV--how about
> coming up with the cash for
> a
> > decent sinewave inverter. If you they want to go
> first class, do it right.
> I
> > would never subject that kind of hardware to a
> $1.25 inverter.
> >
> > Bill.
> >
> > -----Original Message-----
> > From: Kelly Keilwitz
> [mailto:kelly at whidbeysunwind.com]
> > Sent: Tuesday, June 08, 2004 12:35 PM
> > To: RE Wrenches listserve
> > Subject: Plasma TV on square-wave inverter
> [RE-wrenches]
> >
> > Wrenches,
> >
> > We're designing a RV system, which loads include a
> plasma TV. All other
> > loads could run on a square-wave inverter. Will
> the plasma TV run on a
> > square-wave inverter? The retail cost difference
> between a Xantrex
> Pro-Watt
> > and Exceltech or Pro-Sine is about $500.
> >
> > Any experience with the Invertek sine-wave
> inverters (which are
> considerably
> > cheaper than the Exceltech or Pro-Sine)?
> >
> > Thanks,
> > -Kelly
> >
> > Kelly Keilwitz, P.E.
> > Whidbey Sun & Wind
> > Renewable Energy Systems
> > 986 Wanamaker Rd, Coupeville, WA 98239
> > ph & fax: 360-678-7131
> > sunwind at whidbeysunwind.com
> > www.whidbeysunwind.com
> > Renewable Energy Now!
> >
> >
>
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