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<p>It could be the LED bulbs. I've had different brands flicker
like crazy on grid and off. Seems to relate to other loads that
are on, especially stuff like washing machines with VFD drives,
and well pumps. Add dimmers and it can get even worse. <br>
</p>
<p>IMHO, they really need to improve the quality of the driver
circuits on the LED bulbs. Only gets worse on a less than perfect
AC waveform. <br>
</p>
<p>Ray Walters<br>
Remote Solar<br>
</p>
<div class="moz-cite-prefix">On 7/3/2023 5:09 PM, Dave Angelini
Offgrid Solar via RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f8a3cd4281a32b59bfadcdf43106dd7e@sti.net">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div id="v1v1_rc_sig">I think I would try eliminating things. Turn
off the AC coupling for a few days and get results. Turn of DC
solar and get results. Measure AC voltage with a scope or just
observe voltage during the flicker. Are all of the lights
flickering? Are they on dimmers? Are there any loads failing
that could be the source? Is the output with-in spec? Rock solid
60 HZ right.</div>
<div> </div>
<div>
<div>Do an AC bypass of XW with the genset and check for flicker
symptoms.</div>
<div> </div>
</div>
<div>Are they on Insight? They really need it for you to monitor.
Are there any faults, warnings or events ? Check history. There
are a few settings in the old XW+ that could have been glitched
by a surge or nearby lightning strike.</div>
<div> </div>
<div>XW+ could have a damaged FET. Open the unit and do a <span
style="font-size: 12pt;"> visual.</span><span
style="font-size: 12pt;"> </span></div>
<div>There would be a smell and transistor fragments on the bottom
right side of the power bridge. 90% of XW failures have visual
evidence. </div>
<div>
<div> </div>
<div><span style="font-size: 12pt;">While you have it open,
Check the DSP sensing and control board, both LEDs
(light-emitting diodes) D24 and D25 are on.</span></div>
</div>
<div> </div>
<div>Last thing is a DC power down of the unit and the DC buss for
5 minutes. If that does not work, then a reset to factory
values.</div>
<div>This is off an old list I got from Support many years ago and
combined with my findings over the years. Really rare for this
kind of weirdness and why it would be getting worse without
visual evidence.</div>
<div> </div>
<div>Good Luck Howie!</div>
<div> </div>
<div> </div>
<div> </div>
<div>
<pre style="color: #333333; background-color: #ffffff;"><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a style="color: #0069a6;" href="http://members.sti.net/offgridsolar/" target="_blank" rel="noopener noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">http://members.sti.net/offgridsolar/</a>
e-mail <a style="color: #0069a6;" href="mailto:offgridsolar@sti.net" rel="noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<div><br>
<pre style="color: #333333; font-size: 16px; background-color: #ffffff;"> </pre>
</div>
<p><span style="font-size: 12pt;">On 2023-07-03 12:42 pm, Howie
Michaelson via RE-wrenches wrote:</span></p>
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">
<div id="v1v1replybody1">
<div dir="ltr">
<div class="v1v1v1gmail_default" style="font-family:
verdana,sans-serif;">Hi All,</div>
<div class="v1v1v1gmail_default" style="font-family:
verdana,sans-serif;">I upgraded an old clients' off-grid
system about five years ago to a Schneider XW6848+ and 2
Blue Ion 2.0 cabinets (32kWh). When the batteries were
moving toward full, if the charge rate was on the higher
side via generator or solar (AC coupled w/SolarEdge 6kW
and DC coupled with an FM 80), they would start to get
pulsating lights similar to symptoms of other older
inverters when using a generator for charging. The
solution for this pulsation has usually been to kick back
the AC charge amperage just enough so the pulsating calmed
down to a tolerable inconsequential level. And that
worked in this case as well.</div>
<div class="v1v1v1gmail_default" style="font-family:
verdana,sans-serif;">However, a few weeks ago, the
pulsating became more noticeable and has now become fairly
intolerable. To my knowledge, no settings changes we made
within the previous year, and these clients would be loath
to make any changes, so I doubt there were any. More
puzzling is the pulsating has started to happen at
seemingly random times not related to charging. It
happens at night or pre-dawn mornings without the
generator, or during the afternoons with solar charging.
And it is getting progressively worse.</div>
<div class="v1v1v1gmail_default" style="font-family:
verdana,sans-serif;">Anyone have any thoughts on why that
would start getting worse now?</div>
<div>
<div class="v1v1v1gmail_signature" dir="ltr">
<div dir="ltr">Howie</div>
</div>
</div>
</div>
</div>
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