Hello Wrenches, 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%.
Here is a good article explaining what 1/2 loads are as well: https://www.electronics-tutorials.ws/diode/diode_5.html It doesn't explain why the Envy and EG4 struggle with this common type of load, which seems like a serious design flaw. On Thu, Dec 19, 2024 at 6:53 AM Jay via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hi Howie > > That’s great info thanks. > > They never mentioned that to me. > And I’ve not heard about an actual > Hardware issue/fix. > > 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. > > Jay > > > > On Dec 18, 2024, at 9:05 PM, Howie Michaelson via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > > 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. > > Howie Michaelson > > > On Wed, Dec 18, 2024 at 4:02 PM Jay via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> I will add that I’ve heard privately off list that it’s actually smaller >> loads that seem to be the issue. >> >> And larger 1500 watt electric heaters seem to work ok. >> >> I’m wondering if anyone else has come across this issue and I guess more >> importantly is there a fix? >> >> Jay >> >> On Dec 18, 2024, at 1:52 PM, Jay <jay.pe...@gmail.com> wrote: >> >> >> Here is what I understand 1/2 wave loads to be. >> >> As I understand it, Heater loads are the main issue. >> >> Toasters, toaster ovens, hair dryers, aquarium/terraium heaters etc. >> >> But if there are other things pls let us know >> >> Jay >> >> On Dec 18, 2024, at 1:34 PM, GLBCC via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >> >> What is a half wave load? >> >> On Dec 18, 2024 13:35, Jay via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >> Hi all. >> >> I’ve recently been made aware that the fortress inverter isn’t too happy >> with 1/2 wave loads. >> >> I’m wondering if this is an issue with the AIO or solark? >> >> Thanks in advance >> >> Jay >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. 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