Idea

I fully understand nobody care about this feature especially because it is possible to do it w the embeeded node-red but Victron should implement it because as an EPC if our equipment fails the Victron Energy reputation will decrease in the same time.

I have to say, that I don’t completely agree to your request. It would be an additional feature, but is it really worth the effort?

First it will be a (lengthy) discussion if the fallback should be „mode 2“ or „mode 1“ and there is already „a kind of fallback“ implemented.

Correct me if I am wrong but my understanding is that in case of a grid-loss the system itself overrides your external commands and tries to stabilize itself - even with your control present. In case of a communication-loss the ESS has a watchdog that will set the MP-IIs / Quattros to passthru after 60s.

From my point of view a separate watch-dog / fallback feature is therefore only necessary for AC-coupled PV (or other sources) and/or manual „power assist“. At least in the case of PV a few inverters other brands support a similar watch-dog feature that will therefore - if you use the same way of communication and control-server - will also stop there operation.