Battery charging problem

[dlochner]

Hi all
My starter, windlass and bow thruster batteries (regular 12 V) are not getting charged properly.
I have
2x 400w solar
2 Victron mppt
2x 200Ah Dakota lithium
Multiplus inverter charger
DC to DC charger

What’s happening:
When engine running my ENGINE BATTERY ( name shown on my dashboard) goes from 11v to 14.1v. as we drive.
When the engine stops and I am only solar power or shore power the battery level keeps going down to 11.9…
And now I noticed my windlass and bow thruster batteries are also under 12v.
I can’t remotely monitor the charge level of these two batteries so I don’t know if they are getting charged while the engine is running but I doubt it because after 14 h of engine working the bow thruster died on me….

NOTE: the victron DC to DC charger is missing the remote HL switch and on the Victron app it says it is Off….. I am trying to find a replacement switch of course but regardless, the DC to DC has nothing to do with charging the windlass, starter and bow thruster batteries, right?

Any ideas of what to look for?

It is difficult to give you a definitive answer without knowing how the system is wired. It is quite possible that the DC-DC charger is intended to charge the windlass and thruster batteries as this allows for smaller wires to carry the charging current.

The Victron app should allow you to turn the DC-DC charger back on.