460 Wiring diagramme?

The problem is that the AGM batteries are not sufficient to power all the services that remain switched on even if everything is switched off.

My boat has two batteries of 160 AH each, I have already decided to install two more (I hope there is enough space).

After one night with all services switched off except the two fridges and the water pump, I find my batteries with only 36% charge (in the evening they were at 70%). I point out that one fridge consumes 4 A and another 2 A (but when the compressor is running... so not continuously).

It often happens that the switch that checks the state of the batteries senses low batteries and immediately disconnects all services and we have to be ready to reset it. The first time we had to look for it: it's under the sofa in the dinette. The trouble is that it jumps up and switches off all the electronic instruments, the anchor windlass, the manoeuvring propellers, the autopilot... and if you're sailing at that moment, it's not very nice...

You also have to be careful because even if you switch off the inverter from the small black panel, the MasterVolt inverter will work automatically if it does not feel the 220 dockside volts. This draws 1.6 amps. You have to operate the MasterVolt switch to really switch off the inverter (obviously if you don't need it, but at night you don't need it!).

I did a test: I disconnected the batteries and switched off the inverter and I can see that 0.9 amps are still being consumed. I will now try to understand how this can happen.

To conclude: too many electrical and electronic devices have been added that are not under switch and continue to draw power even if the batteries are disconnected. An example for all: the ‘Sentinel’ device that I do not want to use, requires a subscription that I will not make, but it is always on!