I'm planning to use a Phoenix Smart IP43 with 3 Outputs to charge one starter battery, one service battery and a bow thruster battery. There is already installed a Argofet 100-3 to charge the batteries with the alternator.
There is a download of a sample wiring diagram for the IP43 which comes very close to the one that i need.
But there's one thing which is not clear to me:
In the wiring diagram the Phoenix Charger is directly connected to the 3 Batteries but the Outputs of the Argofet are connected behind the Main Switches of the Batteries, so that they are disconnected when Main Switches are off.
What is the sense of wiring it in that way? The Outputs of the Argofet could also go directly to the Batteries, or not?
The background is that the connection from the Argofet to Starter and Service Battery would only be an few centimetres but when connected behind main switch it will be much longer.
Many thanks in advance for answers.