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Discussion Starter · #1 ·
We have a 26' sailboat that we are using on weekends. The boat is moored in the North East. The outboard is powered by a West Marine 650 Starting battery and the specs mention that it requires 465 MCA. The battery also supplies power for the VHF, depth finder, and lights.
I am planning to install a 3700 Rule Bilge pump, 14A, for emergencies. The total daily requirement for the lights, the depth finder and the VHF is around 14 Ah. That would require a battery of about 33 Ah, before adding the bilge pump.
I know that it is recommended to use a separate battery for starting the engine, but I am not sure if that applies to a small outboard or only to big inboard motors. My understanding is that the bilge pump would maybe benefit from a deep cycle battery. Or would the existing battery suffice for starting the outboard and operate the bilge pump in an emergency? Any thoughts on this?

I am thinking to use a small solar panel as a charger, but I need to decide on the battery setup first.
Thank you!
 

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Discussion Starter · #6 ·
I decided to get a deep cycle with a small 5W solar panel to keep it charged. The emergency bilge pump is connected to it (I also have a manual pump).
 
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