I have purchased a Smart DC-DC 12/24 15 amp charger for use on a small boat.
The alternator on the 60HP outboard puts out maximum 21A.
The start battery will be a 75AH Li.
The plan is to charge a 24V 200AH Li battery (used to power a trolling motor) while the engine is running.
I am concerned about overheating the alternator when the motor is running at idle and producing less amperage than the rating of the DC-DC charger.
If the alternator is only producing 5A at idle but the 24V trolling motor battery is discharged and the charger is trying to pull its maximum of 15A, do I have a potential problem?
If I use a Lead-Acid start battery do I avoid potential problems?
Thanks for your help.