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