Charging the inverter battery bank with alternators

Joint Custody

Well-Known Member
Sep 20, 2017
1,266
Lake Powell Utah
Boat Info
2001 460 Sundancer
Engines
Twin Cummins 6CTA8
For those of you that have inverter/charger system or those of you that are very knowledgeable on laying out a inverter system I would value your input.

I will be installing a new inverter/charger this week.

This will replace the one I have now.Reason for replacing is the charger side of the inverter bit the dust.
I will be putting back in the same:
Xantrex Freedom SW 3012 inverter/charger
Output power 3000w

The current configuration is Inverter/charger + four lifeline AGM GPL-4CT 6 volt 220 amp hours each batteries.
No secondary battery charger and the batteries are not tied to the alternators but are tied to the gen through the inverter/ charger.

This configuration powers the 110 side of the house. Refrigerator , microwave, ice maker and all 110 outlets nothing more than that.

The bank of inverter/charger batteries are only tied to the gen and not the alternators.

I am told by Xantrex that the charger side of the inverter will not come on until it reads 10.5 volts from the batteries.

My question is with the engines we have would tying the inverter bank of batteries to the alternators overload the alternators as they already are putting a charge to the 12 volt house/starting batteries.
We have cummings 6CTA8 with stock OEM alternators.

The only reason I would want to do this is to keep the inverter bank " topped off" while running.

Would this be overkill or something worth doing?

We are also looking at adding a 330w solar panel to the hard top.This would go to the inverter bank.
 

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