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25 Bertram DIY refit, Do I want/need three batteries?

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25 Bertram DIY refit, Do I want/need three batteries?

Old 09-12-2019, 12:40 PM
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Default 25 Bertram DIY refit, Do I want/need three batteries?

I'm doing a DIY Refit on a 1972 Bertram(Twin L6 Sterndrives, MC-1 Drives). My first order of business was to get the machinery in order which I'm working through. I have done some engine work and some fuel system work and I'm moving my way back and I'm onto the drives and steering. I decided to upgrade to hydraulic steering and newer style Alpha trim pumps but the pumps really don't fit in the motor well and I decided to move them to the floor in the battery area. So now I'm detouring to wiring. The battery area is fore of the bilge but under the cockpit with hatch access. In order to fit the floor mounted pumps I only have room for 2 batteries in there. The boat has 2 good starting batteries but one is wired as a house battery and they are wired together with Guest switches. If I went to 3 batteries I would have to locate a new house battery someplace else, possibly in deck furniture that is yet to be built. But I could also just stay with 2.

Can I get some input on what is really needed?

I do plan to take the boat offshore eventually but it will mostly be used for coastal exploring and near shore fishing. I do not know how many electrical loads it will have but we all know these things tend to grow over time.
Old 09-12-2019, 01:48 PM
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Join Date: Feb 2018
Location: Peoria Illinois
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You need to decide how you plan to use the boat & determine your electricity needs from there.

if you are going to live aboard - or spend long weekends aboard - plus have gobs of lights, TV, radio, disco ball whatever - will 1 house battery last long enough for your needs.

If it will - you have your answer - if not, you still have your answer.

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