PaulRainbow
Well-known member
View attachment 123551
The switches are shown and on the side are the VSR and a thermal circuit breaker.
The alternator is connected to the starter solenoid and I think the Start switch ties the starter battery to the solenoid. The Emerg. parallel switch has 2 inputs to the VSR so I assume it shunts across the relay.
Looks that way, which is poor design and incorrectly rated cabling. The emergency parallel switch should be wired using cable with the same current rating as the starter isolator switch. The tow cables should be connected to the load side of the respective isolator switches, as shown in the two schematics i previously posted. This allows emergency "jump starting" in the event of a flat engine battery. It also allows for a faulty engine battery to be isolated by turning its isolator switch off and then turning the emergency switch on, allowing the engine to share the domestic batteries. You can, of course, isolate the domestic batteries and use the engine battery in the event of domestic battery failure.
One way to stop the clicking would be to go into emerg parallel mode but that would discharge the starter battery into the leisure battery so I don't want to do that.
Indeed, that's defeating the point of the redundancy of separate circuits.
See post #2