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Old 04-16-2020, 06:29 PM   #1
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Country Coach 8D house batteries

Hi Everyone, I want to replace my 2 coach 8D house batteries and go with 4 6volts batteries can someone give a diagram as far as doing the batteries in parallel and if someone has a pic of this that would be great.

-Paul
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Old 04-16-2020, 06:48 PM   #2
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A quick search got to this one first.



There are many others on the web.
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Old 04-17-2020, 06:22 AM   #3
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Old 04-17-2020, 06:41 AM   #4
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Your have 2, 8 D batteries and they are already in parallel.

That cabling does not change.

All you need is 2 short jumpers to make 2, 6 volt batteries into one 12 volt battery.

The jumpers should be near the same thickness ( Gauge ) as the ones you have.Click image for larger version

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Old 04-17-2020, 07:09 AM   #5
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I to have the 8d’s. What is the benefit of what you were doing?
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Old 04-17-2020, 07:22 AM   #6
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I to have the 8d’s. What is the benefit of what you were doing?

I would guess more AH,easier to handle due to weight,true deep cycle and can be found cheaper.
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Old 04-17-2020, 07:28 AM   #7
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You can buy 12V deep cycle batteries. I went with 4 8D Lifeline AGM batteries. Give the same AH's as 6 volt deep cycles and require little to no maintenance.
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Old 04-17-2020, 08:12 AM   #8
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I am a touch confused. My 8d's are 240 AH at 12v. 2ea 6 volt batteries rated at 240 AH in series produce 12v@240 AH. In parallel they would produce 6v and 480ah so other than possibly price and handling I do not see an advantage. and perhaps a disadvantage in that you have more cable connections to go awry.
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Old 04-17-2020, 08:37 AM   #9
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I am a touch confused. My 8d's are 240 AH at 12v. 2ea 6 volt batteries rated at 240 AH in series produce 12v@240 AH. In parallel they would produce 6v and 480ah so other than possibly price and handling I do not see an advantage. and perhaps a disadvantage in that you have more cable connections to go awry.
8Ds usually are not a true Deep Cycle batty - GC's are one of the best large volume, readily available, reasonably priced ($/AH) batteries available.
https://marinehowto.com/what-is-a-deep-cycle-battery/
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Old 04-17-2020, 09:06 AM   #10
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One of the things I've helped some owner's with, is the learning that you don't double the C20 AH ratings of X's 2 GC2 batteries. (Many thought that when connected together, the AH's added together to yield higher AH output then a 12V. (As has already been stated and explained, nope... They don't!).

The other common reason for going to 6V over 4D or 8D batteries, is the weight to handle for installation is easier. (As has also already been stated!) Price, as in Costco and Samsclub or Walmart, is another incentive too...

Only the OP can tell his reason! Looks like he joined IRV2 in 2014, but it looks like his first post(?) - so delayed welcomed!

Best to all,
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Old 04-17-2020, 10:14 AM   #11
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Why do some isc coaches have 2 8D starting batteries ? Mine had 1 4D when I bought it but I have since replaced with an 8.D. I could pick up the 4D myself but not the 8D. Using 4 Costco golf cart for the living area.
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Old 04-17-2020, 12:09 PM   #12
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Quote:
Originally Posted by Winemaker2 View Post
8Ds usually are not a true Deep Cycle batty - GC's are one of the best large volume, readily available, reasonably priced ($/AH) batteries available.
https://marinehowto.com/what-is-a-deep-cycle-battery/
The Lifeline 8Ds are true deep cycle. Clicky here.

My Discover Energy 8Ds are also deep cycle. Clicky here.

8D is simply a BCI (Battery Council International) designation - standardizes dimensions, and lug connections. Nothing to do with type of battery
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Old 04-17-2020, 02:48 PM   #13
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The Lifeline 8Ds are true deep cycle. Clicky here.

My Discover Energy 8Ds are also deep cycle. Clicky here.

8D is simply a BCI (Battery Council International) designation - standardizes dimensions, and lug connections. Nothing to do with type of battery
I know there are both available out there but not everyone understands the difference and was the point of the post / link
Thanks for the links - good info.
I have AGM 8Ds in my boat now and thinking of switching to AGM GCs when it's time for replacement so allow a 1 man job vs needing a gang of friends to change them out.
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Old 04-17-2020, 04:18 PM   #14
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Quote:
Originally Posted by Winemaker2 View Post
I know there are both available out there but not everyone understands the difference and was the point of the post / link
Thanks for the links - good info.
I have AGM 8Ds in my boat now and thinking of switching to AGM GCs when it's time for replacement so allow a 1 man job vs needing a gang of friends to change them out.


Thanks for replying. I went back and re-read and saw the word “usually”. Too late to edit my original post.

Love your username, btw.

Brian
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