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<p>I'll third the recommendation of a larger generator. I quit
trying the tiny genset setup 15 years ago. My rule of thumb is
the genset needs to be 50% larger than the inverter rating (6kw
for a 4 kw inverter) plus the altitude derating. Here in
Colorado, you pretty much need a 8 kw genset with a 4 kw
inverter. Besides altitude, most gensets do not run right or put
out clean power at full load. <br>
</p>
<p>I've recently found that fuel efficiency is not as bad as you
might think for the bigger gen sets running at 50% rating. The
tiny bit of extra cost and fuel consumption is a small price to
pay for reliable back up power. <br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 8/17/20 12:05 PM, Dave Angelini
Offgrid Solar wrote:<br>
</div>
<blockquote type="cite"
cite="mid:24174ea5cda03a8b50bcc4fa66207412@127.0.0.1">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<p>Many of these issues also were solved with an inverter that had
gen support or load shave.</p>
<p>Time for a new inverter or a generator that is twice the load
wattage. This was common back in the day and as Steve said, some
cases just can't be fixed. Another reason many have abandoned
12v inverter/chargers except for RV use.</p>
<div>
<pre> </pre>
<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
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text 209 813 0060</span></strong></pre>
</div>
<p>On Mon, 17 Aug 2020 10:54:11 -0700, Steve Higgins
<a class="moz-txt-link-rfc2396E" href="mailto:steve@surrette.com"><steve@surrette.com></a> wrote:</p>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px; width:100%"><!-- html ignored --><!-- head ignored --><!-- meta ignored -->
<div dir="ltr">Wrenches, <br>
<br>
When the inverter charger charges the battery bank and runs
loads this can affect the harmonics of the generator output. <br>
<br>
Not much you can do about it other than putting in a larger
generator to handle the inverter/charging load along with the
loads of the system, and even in some of those cases depending
on the generator dosn't even fix that. <br>
<br>
I have seen some successful with filter caps on the output /
Input of the inverter, but that is pretty hit an miss..
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<div class="gmail_attr" dir="ltr">On Mon, Aug 17, 2020 at
10:42 AM Will White <<a
href="mailto:will@solarenergy.org" moz-do-not-send="true">will@solarenergy.org</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px 0px 0px
0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;">
<div dir="ltr">I've seen that same issue too. I assumed that
the battery charging, house base loads, and the microwave
were too much power for the small generator. The voltage
drops big time which I assume is what was causing the
issue with the microwave and most likely with the dryer
too. </div>
<br>
<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Sat, Aug 15, 2020 at
11:51 AM Dan Fink <<a
href="mailto:danbob88@gmail.com"
moz-do-not-send="true">danbob88@gmail.com</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px 0px 0px
0.8ex; border-left: 1px solid #cccccc; padding-left:
1ex;">
<div dir="ltr">I have the same problem at my place, and
a couple client's systems, with Magnum
inverter/chargers and small ~2-3kw generators (not
just Honda). But the problem appliance is microwave
ovens, doesn't matter which microwave brand. They run
fine straight from the generator, and fine from the
inverter with no generator running, but make a
strange, loud hum, dim internal light, and food
doesn't heat if the generator is also charging the
battery bank. I'll try to figure out how to capture a
waveform photo with my scopemeter and post it.<br
clear="all">
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<div class="gmail_quote">
<div class="gmail_attr" dir="ltr">On Sat, Aug 15, 2020
at 9:37 AM Kent Osterberg <<a
href="mailto:kent@coveoregon.com"
moz-do-not-send="true">kent@coveoregon.com</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px 0px
0px 0.8ex; border-left: 1px solid #cccccc;
padding-left: 1ex;">
<div>Matt,<br>
<br>
I haven't looked at what the FXR does to the
waveform of a 3000-watt Honda, but I have used an
oscilloscope to look at the waveform of a small
generator while an FX inverter is charging
batteries -- it pretty much makes an ugly mess of
the voltage waveform. Not surprised to hear that
some loads don't like to operate when the FXR is
charging batteries from a small generator. The FX
charger has a poor power factor and little
filtering of the current waveform, it is a tough
load on a small generator. The generator responds
with lots of harmonic voltages and high frequency
noise.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
<br>
<br>
<div>On 8/15/2020 8:06 AM, Matt Sherald wrote:</div>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px;
width:100%">
<div dir="ltr">
<div>Hello All,</div>
<div> </div>
<div>My curiosity was piqued by a recent
customer complaint. I'm hoping someone has
bumped up against this issue before.</div>
<div> </div>
<div>The customer has a OB FXR2812 and a
3,000W Honda gen. </div>
<div>Her gas clothes dryer runs just fine off
the OB inverter.</div>
<div>It runs properly on the Honda gen (when
the inverter is bypassed)</div>
<div>It will not run when the gen is on and
battery charging is taking place.</div>
<div> </div>
<div>All the other AC loads (including the
washing machine) run properly during battery
charging with the gen.</div>
<div>The OB inverter replaced an old Trace
unit. The dryer worked as it should with
the Trace during battery charging.</div>
<div> </div>
<div>Any thoughts are greatly appreciated.
Thanks in advance!</div>
<div>
<div><br>
-- <br>
<div dir="ltr">
<div dir="ltr">
<div>
<div>
<div>Matt Sherald</div>
PIMBY Energy, LLC</div>
<div>NABCEP Certified Solar PV
Installer®</div>
<div>304-704-5943<br>
</div>
<span><a
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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