<div dir='auto'>Ugh, let's stop using jargon to describe something we don't understand.<div dir="auto"><br><div dir="auto">Performing half wave rectification of a sine wave doesn't make a new type of load called 1/2 wave load...</div><div dir="auto"><br></div><div dir="auto">Half wave rectification has been used by some electronics for years, but is uncommon and inefficient. How an inverter manufacturer can single out this practice and claim it is causing problems is crazy.</div><div dir="auto"><br></div><div dir="auto"> Any rectified waveform will have filtering in the form of inductors and or capacitors to smooth out the waveform ripple that any rectification creates. </div><div dir="auto"><br></div><div dir="auto">Loads are not categorized by the type of rectification they employ, but by their resistive, inductive or capacitive behavior. </div><div dir="auto"><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Dec 19, 2024 09:43, Mac Lewis via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br type="attribution" /><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><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><div dir="ltr">On Thu, Dec 19, 2024 at 6:53 AM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br /></div><blockquote 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’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 /></div><div dir="ltr"><br /><blockquote>On Dec 18, 2024, at 9:05 PM, Howie Michaelson via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br /><br /></blockquote></div><blockquote><div dir="ltr"><div dir="ltr"><div><div style="font-family:'verdana' , sans-serif">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"><div dir="ltr">Howie Michaelson<br /></div></div></div><br /></div><br /><div class="elided-text"><div dir="ltr">On Wed, Dec 18, 2024 at 4:02 PM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br /></div><blockquote 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’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>On Dec 18, 2024, at 1:52 PM, Jay <<a href="mailto:jay.peltz@gmail.com">jay.peltz@gmail.com</a>> wrote:<br /><br /></blockquote></div><blockquote><div dir="ltr"><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>On Dec 18, 2024, at 1:34 PM, GLBCC via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br /><br /></blockquote></div><blockquote><div dir="ltr"><div dir="auto">What is a half wave load?</div><div><br /><div class="elided-text">On Dec 18, 2024 13:35, Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">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 />
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</blockquote></div><div><br clear="all" /></div><div><br /></div>-- <br /><div dir="ltr"><div><br /></div><div><font color="#305A78" face="'times new roman', serif"><br /></font></div><div><br /></div>Mac Lewis<br /><br /><span style="font-family:'times new roman';font-size:medium;color:rgb( 255 , 153 , 0 )"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:'arial';font-weight:normal;color:rgb( 48 , 90 , 120 )"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb( 104 , 104 , 104 )"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>
</blockquote></div><br></div>