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Old 04-08-2012
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Battery identification

Is anyone able to identify the type battery from this photo? I believe they are original factory and ready to replace after 8 years. They were probably ready last year.

I've always thought they were AGM group 31s, but can't recall why. They measure approx 13"L x 6.625" W x 8.5" H.

Right as I was debating whether to get regular GRP31s, at 105a/h each, or the new GRP31XTs, with 125a/h each, I pulled my original survey to confirm what I had. To my surprise, its says they are 4-12volt wetted lead acid batteries. They don't look like wetted batteries to me? Particularly, since they clearly say not to open them (in what appears to be German and English).

So I pulled the original brochure and it says "four 80a/h DryFit service batteries". Those are gel batteries, no? I am her second owner, so they may have been upgraded at original commissioning.

So, holy smokes, I have no idea what I have. Worse, I have no idea what the Xantrex invertor/charger is set up to do. It must not be too messed up to have gotten me this far.

The manuals, of course, are on the boat. Anyone good enough to identify these by sight?

Battery identification-house-batteries.jpg
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Re: Battery identification

They could be SLA (Sealed Lead Acid) a wet battery completely sealed or AGM's I can't tell from photos. I don't think SLA's are common on boats, is it a european market boat by chance? The size at 13" seems right for a group 31, attached a size chart.
http://www.rtpnet.org/teaa/bcigroup.html
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Last edited by capttb; 04-08-2012 at 11:49 AM.
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Re: Battery identification

I think you have some of these....
Sonnenschein Gel Cell Batteries

Over here in Europe, they are commonly used in electric wheel chair's and such..

Pricey though.....

Last edited by Somekindofaviking; 04-08-2012 at 12:24 PM. Reason: Typo...
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Re: Battery identification

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Originally Posted by capttb View Post
They could be SLA (Sealed Lead Acid) a wet battery completely sealed or AGM's I can't tell from photos. I don't think SLA's are common on boats, is it a european market boat by chance? The size at 13" seems right for a group 31, attached a size chart.
BCI Battery Group Size Chart
Thanks capt. That is what I thought about the size. Maybe that's where I originally got the idea. I did contact the prior owner who just assumed they were AGM because they didn't need water. Unfortunately, that could mean a GEL battery too, as specd in the brochure.

I was really hoping not to have to pull one just to check and then have to reinstall it while I wait for the new ones to arrive. They are under the nav table that has a fixed bench. Getting leverage on those 70lb batts won't be fun.

Yes, she is the Jeanneau in my sig line. Do the European's have odd battery types or sizes?.....
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Re: Battery identification

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Originally Posted by Somekindofaviking View Post
I think you have some of these....
Sonnenschein Gel Cell Batteries

Over here in Europe, they are commonly used in electric wheel chair's and such..

Pricey though.....
Wow. I tell you, this site is incredible. I think you are right. I found these specifically in your link and the ah is generally as specd in the brochure. Geesh, I have gel batteries. Not good.



Now the fun part. I prefer the AGM group 31s, as they have much more Amp hrs. I will have to check the Xantex manual to see that it has a setting for charging AGMs and the higher bank size.

Is there anything I need to worry about the engine alternator? We typically charge on shore and with the genset, but I don't want to damage anything. Going from 340ah to 420 or 500 is a big leap.
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Last edited by Minnewaska; 04-08-2012 at 05:55 PM. Reason: Wrong bank size
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Re: Battery identification

What size alternator...does it have a temperature sensor?

dave
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Re: Battery identification

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What size alternator...does it have a temperature sensor?

dave
I knew the questions would only get harder.

I will have to look up the standard alt for a Volvo TAMD31S. No idea if it has a temp sensor.
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Re: Battery identification

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Originally Posted by chef2sail View Post
What size alternator...does it have a temperature sensor?

dave
Apparently, they come with 50amp, 60amp or 130amp alternators. Don't know which I have nor how to figure it out. If it is stamped on there somewhere, it may be a job for the borescope. No way to get close to look.

Also, no clue for the temp sensor.
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Re: Battery identification

To have a temp sensor, either for the alt or the batteries, you will need an external regulator, like the Balmar MC-612. Both sensors are a really good idea with AGM batteries, especially with a big bank. Without the alt temp sensor the the alt will overwork itself to death if the bank is down much.
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Re: Battery identification

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Originally Posted by mitiempo View Post
To have a temp sensor, either for the alt or the batteries, you will need an external regulator, like the Balmar MC-612. Both sensors are a really good idea with AGM batteries, especially with a big bank. Without the alt temp sensor the the alt will overwork itself to death if the bank is down much.
We never idle the main just to charge the house. Of course, it is charging while we are underway with it running. I suppose, coming off anchor, we could be low. But still, we often run the genset in the morning to make coffee, charge batts, etc. Still necessary?
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