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Kirk,<br>
<br>
Unless I remember incorrectly, a single diode gives half wave
rectification, full wave rectification requires two diodes with a
center-tapped transformer or a bridge rectifier. Half wave
rectification injects a dc current on the inverter output; that is
why some inverters don't do well with it.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar
<p><br>
</p>
<div class="moz-cite-prefix">On 1/30/2025 5:59 PM, Kirk Herander via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite" cite="mid:CADN4JrdUB2Qy815PLn=m2wgw1Zz7uU+mmwtD56_sSzJMY8bDTQ@mail.gmail.com">
<div dir="ltr">Fortress tells me they just released the latest
firmware to deal with half-wave loads. This version was put out
for download a few days ago.
<div><br>
</div>
<div>In my case, they say it "might" help (CFL to) LED retrofit
lamps from flickering when switching grid pass-thru to
inverter AC. I am dubious. but I've since read that some LED
lamps do not employ full rectification, just a single diode.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Dec 19, 2024 at
8:54 AM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
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<div dir="auto">
<div dir="ltr">Hi Howie</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">That’s great info thanks. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">They never mentioned that to me. </div>
<div dir="ltr">And I’ve not heard about an actual</div>
<div dir="ltr">Hardware issue/fix. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">The latest firmware 1E1E is supposed to “fix”
it. It also requires a separate firmware update for the
display which you have to do in person, stupid. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Jay</div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><br>
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<div dir="ltr"><br>
<blockquote type="cite">On Dec 18, 2024, at 9:05 PM, Howie
Michaelson via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">
<div>
<div style="font-family:verdana,sans-serif" class="gmail_default">I installed a couple of EG4
18k inverters off grid this past spring, made by
LuxPower as is the Envy. They look very similar
both visually and programmatically. Withone
install, there has been a steady problem of the
inverter shutting off when the client uses a hair
dryer. The other client has not reported any
issues with the inverter cycling off. Tech
Support's solution to this issue which they
referred to as stemming from half-wave loads, was
to run another load simultaneously which was
supposed to help prevent the nuisance momentary
shutdown, but according to the client, it hasn't
helped. After bugging tech support for several
months about this issue, they finally told me that
there was a hardware design flaw that they were
working on resolving and when they had it fixed,
they would send out a replacement inverter. I
asked if they would be replacing both inverters,
but they said since one hasn't reported any
issues, they would not be replacing that one. That
was at least 2 months ago, and I have not heard
anything since.<br>
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<div dir="ltr" class="gmail_signature">
<div dir="ltr">Howie Michaelson<br>
</div>
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<br>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Dec 18, 2024
at 4:02 PM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">
<div dir="ltr">I will add that I’ve heard
privately off list that it’s actually smaller
loads that seem to be the issue. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">And larger 1500 watt electric
heaters seem to work ok. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I’m wondering if anyone else has
come across this issue and I guess more
importantly is there a fix? </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Jay</div>
<div dir="ltr"><br>
<blockquote type="cite">On Dec 18, 2024, at
1:52 PM, Jay <<a href="mailto:jay.peltz@gmail.com" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">jay.peltz@gmail.com</a>>
wrote:<br>
<br>
</blockquote>
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<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">Here is what I understand 1/2
wave loads to be. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">
<div dir="ltr">As I understand it, Heater
loads are the main issue. </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Toasters, toaster ovens, hair
dryers, aquarium/terraium heaters etc. </div>
<br>
</div>
<div dir="ltr">But if there are other things
pls let us know </div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Jay</div>
<div dir="ltr"><br>
<blockquote type="cite">On Dec 18, 2024, at
1:34 PM, GLBCC via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="auto">What is a half wave load?</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Dec 18, 2024
13:35, Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br type="attribution">
<blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<p dir="ltr">Hi all. </p>
<p dir="ltr">I’ve recently been made
aware that the fortress inverter
isn’t too happy with 1/2 wave
loads. </p>
<p dir="ltr">I’m wondering if this
is an issue with the AIO or
solark?</p>
<p dir="ltr">Thanks in advance </p>
<p dir="ltr">Jay<br>
</p>
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<span class="gmail_signature_prefix">-- </span><br>
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<p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><a name="m_-8393339476084287784_m_-8205289619029609627_SignatureSanitizer__MailAutoSig" moz-do-not-send="true"><b>Kirk Herander / </b></a><b><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">kirkh@vermont.solar</a></b></span></p>
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