<div dir="ltr">Hello Wrenches,<br><div><br></div><div>I wanted to look into this to see why a diode might be used in something like a heat load. William is right that a typical heat load wouldn't be considered a 1/2 wave load. However, some power level switches (like the little knob on the hair dryer) may engage a diode that will allow it to only use the top 1/2 of the voltage waveform. This would cut the power by ~ 50%.</div><div><br></div><div>Here is a good article explaining what 1/2 loads are as well: <a href="https://www.electronics-tutorials.ws/diode/diode_5.html">https://www.electronics-tutorials.ws/diode/diode_5.html</a></div><div><br></div><div>It doesn't explain why the Envy and EG4 struggle with this common type of load, which seems like a serious design flaw.</div><div><br></div><div><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Dec 19, 2024 at 6:53\u202fAM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">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"></div><div dir="ltr">Hi Howie</div><div dir="ltr"><br></div><div dir="ltr">That\u2019s great info thanks. </div><div dir="ltr"><br></div><div dir="ltr">They never mentioned that to me. </div><div dir="ltr">And I\u2019ve 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 \u201cfix\u201d 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></div><div dir="ltr"><br><blockquote type="cite">On Dec 18, 2024, at 9:05\u202fPM, Howie Michaelson via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<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></div><br clear="all"></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr">Howie Michaelson<br></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Dec 18, 2024 at 4:02\u202fPM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">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"></div><div dir="ltr">I will add that I\u2019ve heard privately off list that it\u2019s 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\u2019m 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\u202fPM, Jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"></div><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\u202fPM, GLBCC via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<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">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\u2019ve recently been made aware that the fortress inverter isn\u2019t too happy with 1/2 wave loads. </p>
<p dir="ltr">I\u2019m wondering if this is an issue with the AIO or solark?</p>
<p dir="ltr">Thanks in advance </p>
<p dir="ltr">Jay<br>
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