Victron Multi/Quattro & Generator is a topic from time to time, where the Vics do not accept a genset, problems with stability etc.
True, one significant part of the problem may be that Generator vendors often market/label their products with rather optimistic specs (where you find out that your 5KW genset actually tops out at 3.5KW and similar).
However, after observing (and filming - movie available upon request) the handling of a 3p Genset by a bunch of Vics, one would like to suggest that there is a lot of room for improvement on the side of the Vics.
I would suggest to consider implementing an "adaptive mode" for the genset in the Multis/Quattros. What is that?
The Victrons could start with a load of - say - 1A for the genset and slowly ramp that up until the genset voltage drops significantly (or completely). Either make several of these measurements and then remain under min(measurement1, measurement2, ...) or just one and remain under the "collapse threshold" with a safe margin.
In any case - don't put load on gensets like an on/off switch! Almost no genset can handle this.
It would be nice if that could be implemented soon-ish.
Watching our video with the poor genset getting bashed one feels almost "rooting" for the Victrons like "come on guys, you can't be that stubborn" ;-)