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Author Topic: Reserve/starter battery location and mounting  (Read 3774 times)

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Stu Jackson

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Re: Reserve/starter battery location and mounting
« Reply #15 on: June 10, 2016, 08:06:21 PM »

Good point, Noah.  In fact, that's what I have for my reserve bank (which is in the OEM box).  Got a better deal at American Battery, but even $79 isn't bad.  Just don't buy any more batteries at WM, they're just rebranded for more $$.  Use it for other boat stuff or beer!   :clap :clap :clap
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

"There is no problem so great that it can't be solved."

mark_53

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Re: Reserve/starter battery location and mounting
« Reply #16 on: June 12, 2016, 04:37:15 PM »

DOES ANYBODY HAVE PICTURES?  If so can you post, please.

Here you go. I like to keep them secured and in boxes.  Acid on the hull is not good.
« Last Edit: June 13, 2016, 11:09:59 AM by mark_53 »
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1989 C34 Mk1 M25XP

The Green New Deal is coming...just keept the government out of the way!

lazybone

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Re: Reserve/starter battery location and mounting
« Reply #17 on: August 23, 2016, 10:33:13 AM »

DOES ANYBODY HAVE PICTURES?  If so can you post, please.

Here you go. I like to keep them secured and in boxes.  Acid on the hull is not good.

What's the large PVC 4" pipe for?
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mark_53

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Re: Reserve/starter battery location and mounting
« Reply #18 on: August 23, 2016, 01:47:41 PM »

DOES ANYBODY HAVE PICTURES?  If so can you post, please.

Here you go. I like to keep them secured and in boxes.  Acid on the hull is not good.

What's the large PVC 4" pipe for?

It's a duct from the diesel heater to the aft cabin.
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1989 C34 Mk1 M25XP

The Green New Deal is coming...just keept the government out of the way!

Clay Greene

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Re: Reserve/starter battery location and mounting
« Reply #19 on: August 26, 2016, 01:03:19 PM »

I went through the same analysis and I came down on the fact that it was important for the reserve battery to be close to the house battery bank so I did not have to run separate charging wires from the alternator and the battery charger to the reserve battery.  I put the reserve battery in the compartment immediately forward of the starboard water tank under the starboard dinette seat.  I ran a positive wire to the #2 post on the battery switch (with a 2 AWG wire because of the length of the run) and another charging wire to a Blue Sea Systems automatic charging relay that was connected to the positive post on the house battery bank.  The ground was run to the house ground.  I then left the battery switch on #1 and ran everything off the house bank with the knowledge that I had the reserve battery available on #2 (or "all") if necessary.  That also was my opportunity to run the alternator output directly to the house bank and to get rid of the jump wire from the alternator output to the starter. 

I can see why you would want the additional battery to be close to the engine if it was a dedicated starting battery but I still wonder why you would need or want a dedicated starting battery instead of using the third battery as a reserve.  True deep cycle batteries work great for both house needs and starting the engine. 

Anyway, food for thought. 
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1989, Hull #873, "Serendipity," M25XP, Milwaukee, Wisconsin
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