Here's my config:
MacBook 12,1 - OS X 10.15.7 (Catalina) - VictronConnect 5.77
SmartSolar 100/15 - SmartSolar 150/35
100/15 connects and works fine, 150/35 doesn't (doesn't get past 20%); It doesn't even show the live bluetooth digest when on the devices screen prior to connecting.
Both SmartSolars connect fine to iOS app using bluetooth.