SW+ Voltage Sag [RE-wrenches]

[Ray Walters]

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Yea as Jay just noted, Xantrex has problems with tough questions . I had an 
SW pair damaged by lightning that was putting out 144 vac rms. Everybody 
thought I was nuts or had a bad meter, until a former Xantrex employee more 
familiar with the product than their staff finally told me that that was a 
typical failure mode after a lightning surge.  I'd like some honest answers 
on voltage regulation during start surges for the new SW+ series.
As far as Outback goes, they have more than taken care of their obligations 
with me, I just had a lot of  bad will with the customer along with 2 free 
days of drive time & service. I'll be using their stuff again I'm sure. I 
use the PSDC regularly BTW.
And yes the DRs are still a very reliable, low cost, high surge inverter 
for off grid and even grid backup power. Funny that Mod Square wave looks 
so bad on an O-scope, but most stuff still works fine on it. Shoot, I never 
had a Staber Washer not run on a DR, but it won't go on an SW+? I need more 
answers.

Ray

>Ray,
>I'm not sure why Xantrex has not chimed in on this forum, but they do have a
>forum of their own  www.xantrex.com/forum
>
>Jeremy
>All Solar, Inc.
>Penrose, CO
>----- Original Message -----
>From: "Ray Walters" <ray at solarray.com>
>To: <RE-wrenches at topica.com>
>Sent: Monday, August 16, 2004 5:07 PM
>Subject: Re: SW+ Voltage Sag [RE-wrenches]
>
>
>
>
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>
> >Hey Matt;
>
>I tried like model # 00037 from Outback, Chris F. had hand delivered it as
>a demo unit to Dankoff.  We had some probs, and I just thought I'd wait
>till they got the bugs worked out. The SW+ has some good specs: 10,000 watt
>surge, 2,500 watt cont., 8 watt search mode, same old SW pyaramid wave
>form, and the price was way less than the old SW series.
>My evaluation now is that:
>   A.)search mode doesn't work below 16 watts in New Mexico. (Allan S. can't
>get his to search at 8 watts either)
>B.) The high surge is available at the cost of power quality. I think the
>transformer is just too small and too high an impedance to surge to 10,000
>watts (or anything over 2,000 watts) without having a cheap generator like
>blip in power.
>C.) The big AC lugs and wiring room are great, and the way it butts right
>up to the side of Outback's PSDC make it the easiest inverter I have ever
>wired.
>D.) The manual is actually pretty good, somebody put alot of homework into
>updating it.
>E.) Cost is good, I started pushing them instead of the DR series for my
>lower cost systems. (I'm with Frank F. though I still love the old beater
>DR series)
>
>But If the Staber really can't run on the new SW +, I'm in trouble. I'll
>keep looking for other causes for this incompatability and report to the
>group.
>
> >   My question SHOULD have been: Why aren't you using Outbacks? ;-)
> >
> >   I think the problem
> >is that the inverter is just too small for the job, but it should run a
> >Staber just fine. Unless it won't. See the previous paragraph.
> >
> >   Matt T
> >   -
>
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Ray Walters
ray at solarray.com
President, SolarRay, Inc.
NABCEP Certified Solar PV Installer
BS Mechanical Engineering, UT Austin 88
Returned US Peace Corps Volunteer 

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