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Old 16-09-2017, 15:34   #16
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Re: 12v vs 6v in 2nd bank

T-125 have more AH but a shorter lifetime than T-105
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Old 16-09-2017, 17:48   #17
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Re: 12v vs 6v in 2nd bank

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Originally Posted by woodysca View Post
I need to replace the batteries in the 2nd bank on my Catalina 34. As purchased used, it came with four 6v batteries wired in series/parallel. What are the pros/cons of replacing as is, or switching to four 12v batteries wired in parallel?

TIA,
Woody
San Diego
The only real advantage of switching to 12 Vdc batteries from 6 Vdc batteries is the lesser capacity reduction loss if a battery goes south.

If you had only 2 x 6Vdc I would recommend changing to 12 Vdc, otherwise you could lose all of your house bank on a battery failure. But with 4 x 6Vdc you lose two but still have two left until you get it fixed.
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Old 16-09-2017, 19:32   #18
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Re: 12v vs 6v in 2nd bank

OP stated 4x6V so redundancy covered.

Glad you've seen the light RR, sincerely!
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Old 16-09-2017, 20:22   #19
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Re: 12v vs 6v in 2nd bank

Quote:
Originally Posted by woodysca View Post
I need to replace the batteries in the 2nd bank on my Catalina 34. As purchased used, it came with four 6v batteries wired in series/parallel. What are the pros/cons of replacing as is, or switching to four 12v batteries wired in parallel?

TIA,
Woody
San Diego
Most likely those came in the standard battery box in front of the galley, and, most likely, the PO added a separate 12V reserve or start battery somewhere else, or he switches from one 6V bank to the other bank (a waste of lead IMHO). You can't go wrong with that foot print for the most bang for your bucks for the space available. To get the same ah in 12V will be a spatial relationship challenge not for the faint hearted on that boat. I know, I own one!

Consider joining us also on our C34 website and forum: Main Message Board

I "do" both forums daily. The C34 has a lot of boat specific material that might help you to avoid reinventing the wheel. I just spoke to another CFer today who just got a new to him C34 in San Diego. Small world.
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Old 24-09-2017, 08:23   #20
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Re: 12v vs 6v in 2nd bank

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Originally Posted by john61ct View Post
OP stated 4x6V so redundancy covered.

Glad you've seen the light RR, sincerely!
Not sure what you mean? My position is unchanged.
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