Really hoping that someone can assist me here because this is starting to drive me crazy! I have 2 x Axpert King 5Ks in parallel. Setting 28 shows PAL and when accessing them via either Solar Assistant or Watch Power I can see both inverters. So the comms and paralleling seem to be correctly configured.

The main problem is that I'm getting hourly spikes caused by the inverters changing from one output mode (say SbU) to the other (SUb) for roughly ten minutes. I understand that this is the standard firmware time when switching to line mode. Interestingly, it's happening regularly at 2 minutes past the hour every hour:

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I initially thought that this was being caused by Solar Assistant's Power Management function, but soon realised that it was also happening with SA disconnected and when I set the inverters manually. After some further testing, this is what I found:

1. When I manually adjust setting 01 on both Master and Slave inverters via the LCD screen, then it stays in the correct mode without these spikes. Both inverters operate normally in the defined mode.

2. When I adjust setting 01 on the Master inverter only (either via SA or manually) the corresponding setting 01 on the Slave inverter remains unchanged on its LCD screen. However, both inverters operate together in the same mode (i.e. either both in SbU or SUb) meaning that at any given time one of them is contradicting the LCD display. Additionally, they then seem to go into this intermittent output mode changing cycle for 10 minutes every hour. At times I also get both the battery and the grid LEDs illuminating at the same time on the inverter panel.

3. After reading further (https://forums.aeva.asn.au/viewtopic.php?p=75494#FAQ1) I thought it might be caused by my voltage settings (12, 13, 29) but even after adjusting setting 29 (44.9V) on both inverters to be more than 2V below 12 (47V) and more than 4V below 13 (50V) I'm still getting the same behaviour.

4. Changing other settings on the Master inverter only (i.e. setting 12 via either SA or manually via the LCD screen) it also changes on the Slave inverter, although it takes some time for the change to reflect on the LCD screen...around 5 or 10 minutes. 

Firmware version is 71.80

Edited March 29, 20232 yr by Davy777
minor text edit

17 hours ago, Davy777 said:

4. Changing other settings on the Master inverter only (i.e. setting 12 via either SA or manually via the LCD screen) it also changes on the Slave inverter, although it takes some time for the change to reflect on the LCD screen...around 5 or 10 minutes.

Strangely, output source priority isn't one of the things that gets sent from any machine that changes that setting to every other machine, as is the case with many other settings. Why it updates after 5-10 minutes is a mystery to me.

Quote

Firmware version is 71.80

That's fairly old now. I'd consider updating to 72.00. The update is in the files section.

7 minutes ago, Coulomb said:

Strangely, output source priority isn't one of the things that gets sent from any machine that changes that setting to every other machine, as is the case with many other settings. Why it updates after 5-10 minutes is a mystery to me.

That's fairly old now. I'd consider updating to 72.00. The update is in the files section.

Thanks Coulomb,

to be clear, the output source priority setting isn't changing at all. The other settings are changing after 5 or so minutes. Is the spikey output something that you've encountered before? Likely to be a firmware issue? 

Thanks for the tip on the firmware update. I'm assuming that updating it isn't too risky an adventure..  Could you perhaps point me to an article with instructions on how to go about the update itself? 

 

Cheers!

10 hours ago, Davy777 said:

Is the spikey output something that you've encountered before? Likely to be a firmware issue? 

Not personally. It sounds vaguely familiar, so perhaps others have had it. Id say 50% chance it's firmware.

10 hours ago, Davy777 said:

I'm assuming that updating it isn't too risky an adventure..  Could you perhaps point me to an article with instructions on how to go about the update itself? 

Firmware updating is pretty safe, but do read the instructions carefully re choice of the USB to RS-232 adapter (if you go that route).

A link to instructions are in the 72.00 firmware update description.