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Rhigley

Downey Ca

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Posted: 07/18/19 08:02am Link  |  Quote  |  Print  |  Notify Moderator

I have 2 12 volt battery's for the house. When I am hooked up to shore power one battery is real hot and one is not. Do I have a bad battery or is my charging unit over charging?


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Flute Man

Payson, Arizona

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Posted: 07/18/19 08:15am Link  |  Quote  |  Print  |  Notify Moderator

Bad battery
Sounds like.

wolfe10

Texas

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Posted: 07/18/19 08:28am Link  |  Quote  |  Print  |  Notify Moderator

Bad battery. Replace them both.


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CA Traveler

The Western States

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Posted: 07/18/19 08:40am Link  |  Quote  |  Print  |  Notify Moderator

Replace them but a voltmeter may have given you advance warning. Load testing could also be helpful. And if not sealed a hydrometer should reveal a bad cell.

Don't delay and be very careful as batteries can explode.


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Sam Spade

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Posted: 07/18/19 08:51am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:


Don't delay and be very careful as batteries can explode.


THIS. Meaning, STOP charging them until you get it figured out.

Are they conventional "add water" type or maintenance free ??


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Matt_Colie

Southeast Michigan

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Posted: 07/18/19 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

Please listen to CA traveler.

Batteries in parallel can explode if one starts to fail.

Disconnect both and let them sit until cool. Measure the terminal voltage on both and I bet one is low. It will be good for a core.

Do not parallel to lead/acid batteries that are in any way different.

Matt


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Lwiddis

Near Cambria, California

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Posted: 07/18/19 01:42pm Link  |  Quote  |  Print  |  Notify Moderator

Matt's warning is NOT overstated. Follow his instructions. WEAR protective gear.


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Rhigley

Downey Ca

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Posted: 07/18/19 02:39pm Link  |  Quote  |  Print  |  Notify Moderator

I took both battery's out and the one was still hot after an hour so I replaced both of them. Thanks

down home

south

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Posted: 07/18/19 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

yep you have a bad battery and it can explode! Is is swollen any yet.
Last year wife had a very bad smell from car, stopped and it would not restart. Tech checked it and it was still boiling and swollen ready to explode.

wa8yxm

Wherever I happen to park

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Posted: 07/18/19 03:40pm Link  |  Quote  |  Print  |  Notify Moderator

Flute Man wrote:

Bad battery
Sounds like.

Ditto. HOt box likely has shorted cell.
Remove BOTH to a test bench. I'd consider replacign with a pair of GC-2 (six volt) in series to make 12.


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