12v items hooked up with 24v setup

[NJSquatch]

For the additional $100 I would get a 3rd battery for the 12V appliances.

Having the 12 volt appliances running from the 24 v system will result in an uneven drain on the one battery shorting the life of that battery and the series. 24 volt systems like to have the batteries at the same state of charge. The TM might also pull the voltage way down on the 12v side under full power causing your FF to power down.

[Capt. Debbie]

That's a good point. Never asked about charging or if you have a gas motor with alternator to charge.

Isolation becomes key then if you are going to use those same two batteries w/ one as a cranking battery.

Originally Posted by NJSquatch

For the additional $100 I would get a 3rd battery for the 12V appliances.

Having the 12 volt appliances running from the 24 v system will result in an uneven drain on the one battery shorting the life of that battery and the series. 24 volt systems like to have the batteries at the same state of charge. The TM might also pull the voltage way down on the 12v side under full power causing your FF to power down.

[Godrew1972]

No gas motor, it’s electric only.
2 ff, regular navigation lights, 2 electric motors.
3rd battery was my thought for both FF and stern motor
Dual for the 24v for heavier bow motor.
I currently have a dual bank onboard charger, could I still use that if those are the batteries that I creat the 24v with?

[NJSquatch]

depends on the charger. def check your owners manual

My Minn Kota has a smart chip and recognizes the 24 volt system and charges each battery separately.