NicolasM

@system32Do you use a RIOT with your 4 AM-2's?
Thanks for the suggestion to do a firmware upgrade. It was done on Saturday, and as mentioned earlier, the instability is gone. Whether or not it had something to do with the upgrade, I can only guess, but suspect the inverter may just have need a reboot especially as the CT-Coil was done after the initial install, and then again to replace the cabling on the CT-Coil with flexed insulated cable.
The reason for asking about the RIOT is that I use one and as far as I am concerned the RIOT now becomes the BMS and feeds the inverter. Hubble also did a SW upgrade on the Riot (the new Beta version) but now I think they are throttling the charge rate. The batteries never reach 53.6 ...at best 53.27V. Now I am not complaining as it is sufficient to carry all the load at night. It is when we have loadshedding in the 0600 - 0900 slot that I have to be very careful with usage, on a cloudy day. On full sunshine it does not impact as the PV delivers 8KW.
Any experience with the RIOT? It just that its yet another element in the bigger picture and I shouldn't have to use it. It was given to me by Hubble as I constantly had a 0x0C 0x00 and 0x0C 0x0C alarms reported by the LiBMS on Sunsynk before the RIOT...now with the RIOT the LiBMS is all ok.
So it will be interesting to know if you use the RIOT or do you connect directly via CAN or RS485...or both?
Take Care

@YellowTapemeasure I cant agree more. 
Installers do their best to leave you with a setup that will work under most conditions. They most certainly do not have the time to spend on tweaking systems.
However, who are the people that will recommend Sunsynk, or Hubble, or JA, if end users are not very happy with their systems. 
As much as installers need to be able to diagnose issues, what we as end users do to our settings, may have serious repercussions down the line.
I honestly feel that more attention should be given to end-users allowing us to fine-tune our systems but with complete understanding of what is correct, and what not to do.
But where and to whom should such a request go ...? @system32 and other power users.

Hi Guys,
 
Thanks for the comments and advice thus far.
Attached please find a pic of the indoor plant as well as the System Mode settings I use.