How to ground 2 electrical systems- 1 boat

[Olds Eddie]

I have two separate electrical systems onboard. One is the 12v system that powers the engine, lights, and accessories. The other is a 24v system for the trolling motor. The 24v system is two batteries hooked in series. I would imagine that connecting the negetive side of the 24v series to the negative side of the 12v system would do the job. Since I do operate it in salt water on occasion should I install a mercathode controller? I never let the boat sit in salt water overnite, but I have experienced bad corrosion on my trolling motor and outdrive.

 

[JustJason]

Re: How to ground 2 electrical systems- 1 boat

what exactly are ya trying to do here?
How many batterys do you have in total?
what kinda boat?
how many engines?
what kind of engine?
what's charging the batterys?
what are ya looking to ground to what and why?

 

[Don S]

Re: How to ground 2 electrical systems- 1 boat

Moving to Electrics, Electronics and Trolling Motors (not engine)

 

[bruceb58]

Re: How to ground 2 electrical systems- 1 boat

Grounding the negative side of both the 12V battery and the 24V bank will be fine.

Since you don't moor your boat in saltwater, I don't believe there will be any benefit of a mercathode system. Make sure your anodes are replaced if they have worn away though.

 

[Olds Eddie]

Re: How to ground 2 electrical systems- 1 boat

Many thanks. Thats what I thought but it's always good to get a second opinion.