question

Erikas Berzinš avatar image
Erikas Berzinš asked

Boat: flooded starter and AGM house battery charging with Phoenix Smart IP43 (3-outputs)

Hello,

Can someone please advise.

I am building a boat system:


1x AGM battery (Victron 130ah) for house/system.

1x Flooded battery (VARTA LFS95) for starter (>850 CCA required, AGM not recommended by outboard manufacturer).


I have a Phoenix Smart IP43 charger with three outputs and a separate Battery Smart Sense module.


Will it be OK to charge both (house and start) batteries at the same time using separate charger outputs?

The smart sense would be connected to the AGM battery.


Or would it be better to install a battery selector and connect the house battery lead to to the charger output only when it is needed (with AGM disconnected during that time)?


AGM Batterylead-acidPhoenix Smart Charger ip43
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
Mike Dorsett avatar image
Mike Dorsett answered ·

Assuming that you have something like an ACR for charging the house battery when the engine(s) is/are running, then you should only need to connect the charger to the starter battery. Once the starter battery gets to ~13.2V, the ACR should close, and charge the house battery in parallel. Make sure your absorption & float voltages are the lower of the voltages specified for both batteries.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Related Resources

Additional resources still need to be added for this topic