ClauBebe

Here are graphs for today, a very beautiful and sunny day from morning to evening with the mention that the sun rises at 8:00 AM and sets at 17:36 PM. Coulomb, which firmware would be the most suitable for me considering that I have two strings of 10 Canadian solar panels 455W with Voc 41.2 (412V / string) P.S.What does the 150V mean? Is it not the voltage from which the mppt starts or did I understand wrongly? And is there for the 11 Kw Inverter firmware of 150, 180, 200,280,380 and what would be the difference? Thank you It's a possibility to create a new firmware with 380V like a 11Kw inverter?

I also managed to install the new firmware 56.07 and I chose the 150V version (Reflash dsp_x56.07_patched - 556.07_150V) to see how it behaves compared to the previous Coulomb patched version 56.05 (OG-10 DSP Reflash_656.05 patched) which I have had for more than a year and which perform extraordinarily well compared to the mess of the original firmware that was stuck in 90V forever on a cloudy day ! I will come back with an update after a few days of using the new firmware! Thank you Coulomb and Volker

Hi Coulomb, if it is also available for the Aexpert Max II 10 Kw I can test the firmware myself Tx! https://powerforum.co.za/topic/15092-axpert-max-ii-10kw/page/9/#comment-155268

@Coulomb , Hi, Isn't there a new firmware for Aexpert Max II 10 Kw? Tx .

@Coulomb Isn't there a new firmware for Aexpert Max II 10 Kw? Tx .

Coulomb if it helps, I have also put today's data here in the .cvc file, including the one with bus voltage sunny day in the morning and then with the sun hiding among the clouds and clear at sunset Load power-data-2023-01-06 22_50_30.csv Bus voltage-data-2023-01-06 22_50_21.csv PV power-data-2023-01-06 22_50_05.csv MPPT 2 Power-data-2023-01-06 22_49_56.csv MPPT 1 Power-data-2023-01-06 22_49_47.csv MPPT 2 Current-data-2023-01-06 22_49_35.csv MPPT 1 Current-data-2023-01-06 22_49_24.csv MPPT 2 Voltage-data-2023-01-06 22_48_45.csv MPPT 1 Voltage-data-2023-01-06 22_48_27.csv

look here

I assume that it is only one inverter compared to Volker which has a parallel operation of 6 inverters, probably from here the differences in behavior from them https://powerforum.co.za/topic/15092-axpert-max-ii-10kw/page/7/#:~:text=complete off again!!-,Information%3A I have a parallel operation of 6 inverters. All inverters must be either in power out or standby mode%2C otherwise I see a CAN bus error (F80).,-I have therefore "Information: I have a parallel operation of 6 inverters. All inverters must be either in power out or standby mode, otherwise I see a CAN bus error (F80)" I have only one inverter installed in single phase, but unfortunately I didn't have time to open it and remove the "SOLAR" plug to see what happens Anyway, for now the best firmware that exists and is tested by me for Aexpert Max II 10 Kw is QFW 656.05 made by Coulomb (I don't underestimate the work done by Georg594 either!)

I didn't even know about the part with the disconnected "SOLAR" cable until you posted... I will also disconnect the cable to see how it behaves without it anyway, without hardware changes the inverter is "waw" with QFW656.05 compared to OFW56.02 that I had Never in conditions of rain and fog, Aexpert didn't manage to produce more than the Solax, although the arrangement of the panels is more advantageous for Aexpert it is the second dark day when Aexpert manages to produce more than Solax I hope to find time tonight to open the inverter and disconnect the cable "SOLAR", because it powers the whole house and lasts until I disassemble it and reassemble it

it depends on how the inverter is set in SBU or SUB! if it is set in any of these, then the solar production first goes to load, then it charges the battery, hence the difference between solar production and battery charging

I will also disconnect the cable to see how it behaves without it. What would be the disadvantages with a disconnected cable "SOLAR"? I use all 3 sources of energy from solar/grid/battery, not necessarily in that order....when there is enough sun, I often turn off the grid remotely through a contactor commanded by Shelly EM and stay on the battery...I wouldn't wants to stay without electricity in the house .. I only charge the baterry with solar "OSO" never on the grid! From what I see from the graph you posted, there is a huge difference compared to the production with the cable removed and those without the cable removed This is basically how it should behave in low lights!

I will also disconnect the cable to see how it behaves without it. What would be the disadvantages with a disconnected cable? I use all 3 sources of energy from solar/grid/battery, not necessarily in that order....when there is enough sun, I often turn off the grid remotely through a contactor commanded by Shelly EM and stay on the battery...I wouldn't wants to stay without electricity in the house .. From what I see from the graph you posted, there is a huge difference compared to the production with the cable removed and those without the cable removed This is basically how it should behave in low light! L.E. : here is the production of the Solax and Aexpert Solax 0,50hWh Aexpert 0,5 kWh

unfortunately I don't "speak" the language of inverters ... all I can do is to put as detailed graphs as possible to see the behavior of the inverter anyway, the Aexpert behaves very well with QFW 656.05 compared to the original firmware FW56.05 Canadian Solar-Datasheet-HiKu_CS3L-MS_EN , I have 20 pics 375w, 10* 375w on string / MPPT1 and MPPT2

predominantly sunny day comparison between Solax and Aexpert Max II QFW 656.05 for a whole day as well as in the evening PV1 Solax is similar with my PV1 and PV2 Aexpert configuration PV2 Solax has it is exactly like the other strings, only 5 of them are oriented to the west due to the lack of space on the roof, here is the difference in voltage/amperage between PV2 Solax and PV2 Aexpert

up to a certain point when the sun rises a little they are equal

PV2 Solax does not only have 5 panels, it is exactly like the other strings, only 5 of them are oriented to the west due to the lack of space on the roof

a small update between Solax and Aexpert Max II 10 Kw sunny day I also managed to find the graphics from Solax PV1 Solax is similar with my PV1 and PV2 Aexpert configuration PV2 Solax has 5 pieces facing west, here is the difference in voltage/amperage between PV2 Solax and PV2 Aexpert At Solax, it can be seen that at the beginning of the day the voltage increases almost to the maximum of ~ 350 Vdc without any amperage, after which it drops to ~ 100 Vdc and the amperage starts to rise as the voltage also rises

No hardware modification, just software with your QFW. I don't have any problems to open my inverter, 🤣😉 I don't know that post with modification, I will look at it

yes, both inverters are connected to the grid at that moment with full house load. Solax is a permanent ongrid without storage and the Aexpert was set to SUB what firmware version do you have? U1 and U2 ? that's why I'm afraid...repeated starts to lead to a lack of power and a "jumpy curve" I will come back with more comparative graphs between the 2. Overall, Solax is much more productive than Aexpert on cloudy days The Aexpert beats it only on sunny days due to the much better positioning of the panels, all facing south, while the Solax has 5 panels facing west

a small update between the total power produced from the panels between Solax and Aexpert Max II 10Kw iI will post the graph between the two inverters so that we can see how it behaves in the evening and the total produced from solar panels unfortunately, Solax does not monitor individual voltage and amperage to see the exact instantaneous voltage/amperage ratio between the 2 inverters in real time

With QFW 656.05 I caught a cloudy and rainy day with very weak sunlight Compared to the Solax that I monitor and which works at maximum capacity, which today produced only 0.80kWh all day, my system produced 0.90kWh, something that never happened to me with the original firmware, which remained stuck in 90v for a day like this, and it didn't produce anything only if I keep resetting it manually I am attaching the comparative graphs between the 3 QFW 456.05, 556.05, 656.05 and here the whole chart for today, cloudy and rainy day with QFW 656.05 I'm curious to see Volker's graphs, which can track in real time the behavior of the 2 firmwares QFW456.05 and QFW656.05

hello everyone, I managed to write the QFW 456.05 firmware and I have back with the comparative graphs between QFW 556.05 and QFW 456.05 in the morning . QFW 456.05 seems to open faster in the morning... the first 2 days. (26/27) are approximately the same cloudy lighting conditions and the third (28)day being sunny. in the evening it seems to be about the same thing maybe the time should be changed to one minute in QFW556.05 to see how it behaves it seems Volker is right

I will also upload the previous version 456.05 tonight and I will come back tomorrow with the observations today it was cloudy in the morning and it seems that it stayed longer at 90v For now it seems that it still has to pass 0.6A to be able to jump from 90v to ~ 320v in the evening it seems to be a little better, it freezes at 90V when the amperage drops to 0.200A maybe it's not a bad idea if it could be implemented

I assume it's due to the lack of amperage, at least that's what the graphs show to me, please look at them and this is how the production looks to me today, a mostly sunny day

here are the graphs in the early hours of the morning and in the evening I apologize for so many graphics, but I want Master Coulomb to see in as much detail as possible what is happening with the MPPTs today was a sunny day, tomorrow is expected to be darker and in the following days it seems that it will also rain and then we will see better how it behave this morning it seems that on MPPT1 it was 0.500 A to increase from 90V to 357V and on MPPT2 it was 0.200 A to jump from 90V to 347V, both identical strings in the evening it dropped from ~240V to 90V to a current of 0.100A on MPPT1 and from ~240V to 90V to a current of 0.100A on MPPT2. So it seems that it remains stuck at 90V when it no longer has current, so 0 power