In my installation I am running a generator with a ComAp control unit that feeds directly into the DC distribution.
I used a custom written driver on my Cerbo GX that would show up as alternator in the VenusOS. In the VRM portal the alternator was also recognized and one could visualize voltage and current.
With the support for DC gensets in VenusOS 3.50 I updated my driver to use the dcgenset dbus path. Now the generator is correctly showing up in VenusOS under devices, but it does not show up in the VRM portal.