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Thanks a lot. I think I'm starting to get confused with the versions. I installed the one @Coulomb reported at https://powerforum.co.za/topic/17487-firmware-axpert-max-twin-11k/page/5/#findComment-210250. Is your 264.62 the same or something else?

Thanks so much, @Coulomb ! I updated to x64.62 and everything seems to be working great. I no longer have the 90V lockout, now they get 180V in the morning! I only have an annoying F60 error that occurs when the house requests more than 7kW, but that's probably due to the crappy batteries I still have. It would be great to have the latest firmware version with all your best tweaks. Thanks again!

Thank you

Thanks Pecov, is this 264.62 the latest available update? Can I ask you a favor? Can you tell me the files and the correct procedure? Maybe there's another post I should follow.

Hi @Coulomb , in a previous post of mine I asked you for help like this "Hi Coulomb, I'm new to the forum and I think you're one of the wisest. I have a problem with my 2 inverters connected in parallel. They are the SMW 11KW 48V Easun/POWLAND model, these in short https://amzn.to/4cUGdMH Early in the morning they stop at 90V, I think they suffer from what I read here ("90V bug"). If I disconnect and reconnect the differentials in the string boxes, the voltage rises to 270V for each of the 4 strings I have. The firmware for both inverters are U1 64.09 and U2 38.14. " Unfortunately, I haven't been able to update since then, and now I'd like to try because the 90V lockout problem and the possible 100A charge limit are bothering me. I have two questions: 1. What are the most up-to-date and stable versions of the patches you've created? 2. I'm about to replace my old AGM batteries with two 2P16S battery packs up to 30kWh and two separate JK BMSs. With your patches, is it better to set them on the inverters with User parameters or connect one of the two BMSs? Thanks so much for your support.

Hello and thanks for the answers. 1. beginning of summer 2. no I meant with 12kwp of panels in this configuration I would expect a much higher production at the end of a sunny day. Unless the inverters only report the production if there is a load connected. I thought they reported the production regardless of the load. 3. the battery is detected by both inverters with a gap of 0.5V

@stakoz hi you're welcome. I don't think it's off topic, this happened to me after the firmware update to solve the 90V block problems and I was wondering if it's normal or not. I'm referring to what I wrote previously. Did you read?

thank you

@Coulomb Hi, I mounted on a gable roof with east and west exposure 4 strings of photovoltaic panels connected two by two on two hybrid inverters connected in parallel communicating with each other. From this parallel I get the 230V single phase. Each string is 3 kwp. The slope is 30 degrees and it is the month of June. Without any load connected to the system, at the end of the sunny day one inverter marks a production of 5kWh and the other 7kWh. Is this normal? Thk

what can I say you are great! I like these things but from your description I think the path for me will be long. I built my system and now I came across this forum because of the problem with the 90V. You are really prepared and kind and I take advantage of you because I am afraid of bricking my inverters and losing a lot of money. Thanks again for your availability

ok perfect. I'm not very experienced and I'm new to the group. What does the patched one solve besides the 90V problem? plus I would really like to learn how to do it? What software do you use for patches?

so it's not very useful for you to have it?

Hi @Coulomb in addition to what I wrote to you, I have news that could be useful to the community. Easun support to whom I had asked the 90V problem about a month ago before doing it in this forum, sent me a firmware 64.62. Do you want to analyze it for all of us? Thank you very much MAX 11K TWIN 64.62.rar

Hi @Coulomb , I bought a third inverter with the same firmware as the two that are in parallel. I did it to have a safety backup. Maybe I'll test the update first on this one and then on the other 2. To proceed, is it enough to power the inverter with AC or do I also have to connect the panels and battery? Thanks

top thank you!

thanks again. I'm scared to death! They are 2 inverters in parallel and I really don't want to buy them again. Why do you think this happens? "this morning at 7:00 I noticed a strange thing: even though they both had the same firmware (U1 64.09 and U2 38.14) the first inverter to the east had the usual bug at 90V while the second to the west marked 230V. I repeat, same strings for both and same firmware. How is this possible? "

Good morning, forgive me again but I am new to both the forum and photovoltaics. Before flashing the firmware as requested by @Coulomb , this morning at 7:00 I noticed a strange thing: even though they both had the same firmware (U1 64.09 and U2 38.14) the first inverter to the east had the usual bug at 90V while the second to the west marked 230V. I repeat, same strings for both and same firmware. How is this possible?

Thank you so much they are sold by Powland but on the inverters there is the Easun logo. I have 4 strings of 6 panels (Longi 535wp) for a total of 24 panels (12 to the EAST and 12 to the WEST). Each string should give 270V, so I guess I will choose the 200V version. I rename the file to dsp.hex and launch ReflashTool_Xseries.exe via COM1 ? Just this? can i flash only the primary one or do i have to flash the secondary one of the screen as well?

Thanks for the reply. If it doesn't work as I hope, can I go back to the original? I mean, is there a way to extract the original firmware before proceeding? I must use dsp_x64.62_patched_200V_150V_90V.zip ?

@Coulomb Hi Coulomb, I'm new to the forum and I think you're one of the wisest. I have a problem with my 2 inverters connected in parallel. They are the SMW 11KW 48V Easun/POWLAND model, these in short https://amzn.to/4cUGdMH Early in the morning they stop at 90V, I think they suffer from what I read here ("90V bug"). If I disconnect and reconnect the differentials in the string boxes, the voltage rises to 270V for each of the 4 strings I have. The firmware for both inverters are U1 64.09 and U2 38.14. With what update or setting can the problem be solved? Thank you very much