I have a small fishing boat with the house load (12V at average load about 2-3A) supplied by the starter battery (conventional, not lithium). There is a separate 24V circuit (2 x 12V 100Ah lithium in series) to run the electric trolling motor. To reduce the risk of the starter battery charge getting run down by the house load, I'm planning to add a 24/12-9A Isolated Dc-Dc Converter to keep the starter battery topped up. In effect the house load will be supplied from the 24V system via the converter. I can protect the starter battery without the need for a dedicated 12V house battery.
Sketch of proposed setup below.
- Do I need the to fuse the input and output of the 24/12 converter? (am thinking only on output, since input is already fused)
- Does the converter need to be turned off before starting the outboard? (I assume not)
- Will the outboard alternator and the 24/12 converter play nicely with each other? (I assume yes)
- Optimum output voltage to set the converter output (I was thinking around "float" voltage i.e. 13-13.5V)
Thanks in advance.