Put SB50 connectors in-between DC isolator and the MPPT. Chopped the mc4 connectors off a short PV cable and made a SB50 fly lead for my portable Renogy so I can use either the PV on poptop roof or portable setup to charge leisure battery.
View attachment 320660
Snap, i've done something similar. No PV on the roof yet but I do have an Ecoflow 160W portable panel that I got with my River 2 Pro. Here's me testing it last week. The MPPT has since been installed on top of the cupboards so I can easily connect up the portable panel with the XT60 connector if need be