Anyone recognize these batteries?
- Thread starter Gilligan
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The New JC777
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It is 12 volt. 12 volt POS terminal bottom left, 12 volt NEG terminal top left. How old are they?
I am not certain. I will try to find out, but how can you really trust what the seller of a used "vehicle" says? 
So they are 2v cells? I assume they are AGM.
Anything else that we can tell from the pictures?
I'm thinking I want to go 24v as the hybrid charge controllers get better at 24v for the same money, but if I'm stuck at 12v then I'm stuck at 12v. Or maybe it would make sense to sell these cells and build a LiFePO4 bank?
Can we even guess at capacity based on this pic?
So they are 2v cells? I assume they are AGM.
Anything else that we can tell from the pictures?
I'm thinking I want to go 24v as the hybrid charge controllers get better at 24v for the same money, but if I'm stuck at 12v then I'm stuck at 12v. Or maybe it would make sense to sell these cells and build a LiFePO4 bank?
Can we even guess at capacity based on this pic?
The New JC777
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It's a rats nest. Hope the rest of the boat isn't like that. I think the label reads: NON SPILLABLE BATTEERY. I'm guessing 800 A/H
It's not the greatest...
It was wired for european ac, so the power controller is an old mastervolt 12-1500 (apparently one of their first models). So he has his "shore power) coming into a solid core romex line that feeds a few outlets on the other side of the boat lol.
No inverter at all, no shore power to charge batteries unless you hook up an automotive style charger, just a small (probably pwm) charge controller from the pv panels to these batteries.
So I will pretty much be rewiring just about everything once I get it all sorted out.
The New JC777
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If the battery will be on shore power and on float most of the time, AGM is proven to last a good long time. If heavy cycling, take a close look at LFP batteries.
The New JC777
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The cell interconnects are substantial. I'm guessing 2/0 or 4/0. It's been a while since I wrestled with a 2 volt AGM. How many solar panels?
I've been thinking of going with a hybrid system that will run off solar/battery until the batteries are too low, then switch to shore power until solar charges the batteries back to ~95% then switch back to solar/battery... Rinse repeat
Three 80watts I think.
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The New JC777
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Any other photos of the boat?
Bah this is the pop yachts link... But search and you will find sites that don't require login.
Sold: Beneteau 432 Mooring Boat in Bay Saint Louis, MS | 204755
Pre-Owned 1988 Beneteau 432 Mooring cruising sailboat (400 hrs) for sale in Bay Saint Louis, Mississippi (near Gulfport). View photos, features and a detailed description.
The New JC777
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The listing says it has 3 batteries. Glad it survived the last Hurricane. I apologize for the "rats nest" remark, looks like a nice boat. I also noticed that it's under contract.
Yeah the listing is a little all over the place. I do need to put eyes on these batteries as I kept forgetting to remove the companionway stairs they hide behind.
The contract is us. ?
Went check the boat today and got a little better look at the batteries.
They are pretty beefy.
I'll post pictures.
8"x6.5"x18"
If you look REALLY carefully you can see a little bit of the label... Couldn't get a better imagine than that.
They are pretty beefy.
I'll post pictures.
8"x6.5"x18"
If you look REALLY carefully you can see a little bit of the label... Couldn't get a better imagine than that.
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There is.
If you look between the batteries you can see a bit of that label.
Has a part number that you can't read and such lol.
Looks like it says 70P- <something>.
I tried googling 2v agm battery and that number hoping it would have something but nothing so far.
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OPzV? 2V AGM and 490AH brings up 'tubular gel cells'..odd.
