In reading the CerboGX manual (Section 2.3.2: Connecting more VE.Direct devices to your Cerbo GX than number of VE.Direct Ports), I apparently missed that the first sentence indicating 5-connections maximum applied only to the CCGX and that, despite the title of the subsection, there was no maximum given for the CerboGX. If one follows a link in that section that provides the number of connections for several other GX devices (but not mentioning CerboGX as among those), a followup footnote below the linked table finally informs one that the max is for a CerboGX is 3 VE Direct connections regardless of whether they are connected by VE Direct wiring or via USB or VE Can connections. So, it appears my planned four VE Direct to USB adapters connecting the MPPTs to a powered USB hub, then via USB to the CerboGX, won't work.
So, is there a way for me to properly operate my four smallish solar panels (they are on a boat) along with the BMV and a Multiplus Compact through a CerboGX?
I've seen some other threads that play around with the question of 4 MPPT controllers and a CerboGX, but they seem to just end without any resolutions or conclusions.