runtimeassertion

Hi, Looks like I missed some posts here... Oh, that explains a lot! Who came up with such brilliant versioning But, looks like 60.08 doesn't have smart fan control - that's why I decided that 60.95 is the latest! Anyway, it works fine now. Maybe I update it once some new firmware is released... My display module of the clone inverter was failing to flash in less than 10 seconds, due to, most likely slow optocouplers, as Coulomb assumed in the post dedicated to the bypass cable. The original inverter didn't have such issues.

Got my new Pip-4024MT today. The difference is huge! I didn't fully open it, but spotted clearcoat finish at the pcb, bigger electrolytes and lots of different thingys which make it more solid. It works fine, switches faster when power goes off, produces less splatter sounds while generating output. It came with U1 60.08 U2 25.12. I decided to update it to the latest firmware found here: U1 60.95. And this time update was like described, through the display module, without any error from the first try. A little fly in the ointment is the "premature float bug". Now it stops charging when voltage is float (27.2 for my case). But it really stops charging, so no longer pulses 0 - 3A. Now I tend to think, it might be related with missing BMS connection and using my LiFePo AGMlike style. - It can't detect when charging is finished? Once I have other battery to test, I'll check it. In any event, I'm glad to invest in the original device and have it here!

Hmmm... I thought it might be reproducible only for LiFePO4 without BMC connection, when inverter tries to charge it, but BMS peridocally turns battery off trying to balance, that's why it might "pulse". But I don't see any explanation for the same behavior with lead acid batteries... It could be either hardware or software bug, especially if the latter has sophisticated condition branches, as Coloumb said once while speaking about premature float bugs... Unfortunately, I don't have solar panels and can't test it with different modes..

Thanks, @Coulomb ! So, it is decided then!

So, I've been testing my ouyad clone for 2 days and finally found something which looks like a bug, either hardware or software. It looks like an opposite to premature float bug, since my battery never switches to float mode. I use my inverter as a UPS, no solar connection, just utility and a battery. I have 25.6V 100 Ah LiFePO4 battery with BMS without RS232 port (no connection to the inverter). In settings I set User mode, 28.4v bulk, 27.2v float, 24v cut-off voltage. Battery is charging by 30A current up to 27.4v and then charging is "pulsing" from 0 to 10A and less, the closer to 28.0v it is. After reaching 28v the voltage is not changing up to 4-5 hours, charging is constantly pulsing 0 to 1-2A. First I thought that it might be related with battery, but if I discharge the battery and then set 28v as a bulk voltage, it hangs charging on 27.6v... I don't think, this is correct behavior and it is ok for the battery. Could it be related with specific setup? I.e. Do I need to use a connection to the BMS for LiFEPO4? But I used to have similar 1kW inverter with 12V LifePO4 battery without connection and after some time, charging process was finalizing, it was clearly indicated on the display. Now I tend to think that the reason is in the hardware due to the cloned nature of my inverter. If this behavior is not related with the official firmware (it was reproducible in the "native" 56.09 and the latest which I flashed - 60.95) I would like to purchase original version. I investigated the market and found that, at least, MPP Solar ships inverters directly to Ukraine. I'm looking for 3-4 kW model, which will be used as a reserve power supply in the apartment building, solar controller is an option for future use. I consider buying between the original of my "ouyad" 4024MT and 3024GEW @Coulomb , you have huge experience in the inverters field, could you point me please to the best option from these two, or maybe to the least buggy other one? Regards, Oleg

Sure, I found it in the forum here: It was said that it introduces smart fan control, and now I can really observe this. Thanks for the explanations about these inverters. If I would have this information, probably I'd chose original version. I didn't have enough time, I needed the backup power urgently due to the critical situation in power grid and the stock was almost empty everywhere in the country.. As a software developer I wouldn't like if my software was stolen and sold under other names without any fees. I don't get why they use the same case color naming, is it legal at all to sell it worldwide, offering custom labeling...

Hi @Coulomb, Thanks a lot for the reply! I tried what you advised and it works now! Using your bypass cable directly flashing to the inverter, I started from 56.72 and it was succeeded. Then I tried again 60.89 and 68.04 - no luck (the process was failing at the middle with read error), so I reflashed on 56.72 and then tried 60.04. And it worked! Then I tried sequentially all 60.XX and ended with 68.04 successfully. I couldn't imaging that if bootloader was the same the order of flashing firmwares matters. Now I finally enjoy silent fans! Hmmm, honestly I thought that all these inverters are OEM and available from different brands( Voltronic, Axioma, QPower, LogicPower etc) and were manufactured in the same facility somewhere in mainland China (OUYAD?), but now I see that originally it was from Taiwan, but then clones were produced But in any event, even if it is a clone, it looks robust and reliable inside. Testing now in different modes... Thanks again for help!

Hello there, I decided to use this topic, since here I found a source for the Control Board which most likely I will need... (Thanks @vdml) I have similar inverter but with 4K power (Locally LogicPower VM III Twin 4K with removable display) Initially it was with U1 56.09 and U2 25.06 firmware. Following different directions from this forum I found needed how-tos and software updates (Thanks @Coulomb!) (I wanted less noisy fans, looked for a fix for premature float bug), but it seems, I bricked it completely. I started the update with "VM III TWIN dsp 68.04" using DSP reflash tool and USB data cable connection. This cable I've been using a lot of times for flashing and setting Speedybee, Pixhawk drones with Betaflight, Ardupilot, everything was fine. The flashing of the inverter was started successfully but failed after 30 seconds with Connection Error. Now when I turn on the inverter, even coolers are not starting, after Display countdown, it shows "Fault 32". I tried to reflash it with USB to RS232 cable, created a bypass cable, to avoid using Display module. The outcome is the same - the flashing hangs after read err (See screenshot). I was looking for the way how to debrick it, but I ended up here and, looks like, I will need to purchase this control board. But before that I would like to ensure, maybe is there a way to reanimate my control board, maybe by reflashing it by some other bootloader, which will be consistent with the latest firmware for this inverter.. Thanks, Oleg