Dear Victron enthusiasts,
for an install in a sailing boat: it is unclear to me, why Victron recommends a main switch between Multiplus and BMS/battery. The Multiplus has an off-switch itself, which ensures zero current. A Digital Multi Control can be used to place the off-switch at any convenient location. What is then the purpose of a true main switch between MP and BMS/battery? When will the main switch be typically set to the off-position?
The on/off switch or the Multi Control are only soft switches, they do not isolate the DC input, they turn the charge/inverting electronics on/off and the ac input relays.
If you need to maintain the Multiplus then without an isolator you would need to pull a fuse / disconnect wires, needing tools but OK.
If you need to isolate the Multiplus in an emergency then needing tools is not tenable.
Excellent answer. My question is answered in all aspects. Thanks.