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Yeah, boB - I think this sounds like a good trail to follow.<br>
<br>
Matt<br>
<br>
boB Gudgel wrote:
<blockquote cite="mid4A74F530.2040706@midnitesolar.com" type="cite">Darryl
Thayer wrote:
<br>
<blockquote type="cite">Don't know if this will help, but an
experiance of mine on starting a large motor, using a battery and
inverter. The motor would not start, or if it did if would quit in 10,
or 20 min. The battery had capacity to run the motor for 5 or 6 hrs to
50% DoD yet the inverter would kick out. I had reason to beleive the
output wave form was bad also. I solved the problem by greatly
increasing the battery size and the cables. I did not change the
inverter at all. <br>
What I think was happening is the high current draw of the inverter to
serve the load reduced the battery voltage, but not just the average
battery voltage but the 60 cycle peak voltage drop/ of the battery.
The load of the inverter on the battery is like pulses, my amp clamp
shows an AC current on the battery leads. If I had a scope, I would
guess the inverter is seeing a fluxuating voltage on the battery. My
grandson has a 1 Farad Capacitor in his sterio system, perhaps this
would fix the problem. BoB what do you think?
<br>
Darryl
<br>
</blockquote>
Try it. Put it right across the inverter DC terminals if you do try
it. Sometimes, higher capacitance can actually make things worse,
like, raising the peak
<br>
DC voltage seen at the inverter terminals due to L-C resonance.
<br>
<br>
boB
<br>
<br>
<br>
<br>
<br>
<blockquote type="cite">--- On Sat, 8/1/09, boB Gudgel
<a class="moz-txt-link-rfc2396E" href="mailto:boB@midnitesolar.com"><boB@midnitesolar.com></a> wrote:
<br>
<br>
<blockquote type="cite">From: boB Gudgel
<a class="moz-txt-link-rfc2396E" href="mailto:boB@midnitesolar.com"><boB@midnitesolar.com></a>
<br>
Subject: Re: [RE-wrenches] Magnum inverters (not really a power factor
issue)
<br>
To: "RE-wrenches" <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a>
<br>
Date: Saturday, August 1, 2009, 6:22 PM
<br>
Larry Crutcher, Starlight Solar
<br>
wrote:
<br>
<blockquote type="cite">Hey Matt, I sure wish their techie's
would get to the bottom of
<br>
</blockquote>
it. I am getting gun-shy about selling Magnum and they are
<br>
about the best available for small 12 volt systems. I have
<br>
spend hours trying to solve the problem. My customer is
<br>
still not a happy camper.
<br>
<blockquote type="cite">Larry Crutcher
<br>
Starlight Solar
<br>
(928) 941-1660
<br>
Renewable Energy Products, Service and Installation
<br>
</blockquote>
Can you get someone to look at the voltage and/or current
<br>
going into that pump ?? Scope
<br>
? Meter ? Even a
<br>
power factor meter would have both voltage and current
<br>
measurements. Some even have a mediocre scope built
<br>
in.
<br>
A scope AND a meter is best of course.
<br>
<br>
Need stats. AC an DC side. AC voltage at
<br>
the pump and at the inverter.
<br>
<br>
Must have more information. Yes, it ~could~ be
<br>
a Magnum inverter issue, but need more information other
<br>
than "it doesn't work"
<br>
<br>
Does the voltage dip when the pump tries to start ? What is the maximum
Ac and DC current ? Most basic
<br>
info for troubleshooting.
<br>
<br>
The inverter manufacturer can probably help somewhat if
<br>
they have this info.
<br>
<br>
Just a suggestion here.
<br>
<br>
boB
<br>
<br>
<br>
<br>
<br>
<blockquote type="cite"><br>
On Aug 1, 2009, at 4:28 PM, Matt Tritt wrote:
<br>
<br>
<blockquote type="cite">I took boB's advice and talked to
Magnum about the
<br>
</blockquote>
</blockquote>
problem. Their take on it? "Hmmm, beats me!" I might be
<br>
paraphrasing, but that's the drift. All in all, I'd say that
<br>
the suggestions from the group are at least as good as the
<br>
one's from the manufacturer.
<br>
<blockquote type="cite">
<blockquote type="cite">Matt T
<br>
<br>
Larry Crutcher, Starlight Solar wrote:
<br>
<blockquote type="cite">Don't forget, this is a Magnum
inverter and
<br>
</blockquote>
</blockquote>
</blockquote>
Magnum has issues. I have two customers with Magnum
<br>
problems. One is a washer that will work perfectly on
<br>
a cheap import inverter; the other has a Vizio TV that works fine on
shore power and generator. Soooo...maybe there
<br>
are pumps and other items that are anti-Magnum.
<br>
<blockquote type="cite">
<blockquote type="cite">
<blockquote type="cite">Larry Crutcher
<br>
Starlight Solar
<br>
(928) 941-1660
<br>
Renewable Energy Products, Service and
<br>
</blockquote>
</blockquote>
</blockquote>
Installation
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