Good Sam Club Open Roads Forum: Tech Issues: State of charge
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RJsfishin

Winston Or.

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Joined: 10/16/2007

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Posted: 06/01/20 08:28pm Link  |  Quote  |  Print  |  Notify Moderator

I use a loaded test, tv and 1 lite on, 11.9v time io recharge.


Rich

'01 31' Rexall Vision, Generac 5.5k, 1000 watt Honda, PD 9245 conv, 300 watts Solar, 150 watt inv, 2 Cos 6v batts, ammeters, led voltmeters all over the place, KD/sat, 2 Oly Cat heaters w/ ox, and towing a 2012 Liberty, Lowe bass boat, or a Kawi Mule.


S Davis

Western WA

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Posted: 06/07/20 11:43am Link  |  Quote  |  Print  |  Notify Moderator

So this ARB 50 quart frig is pretty efficient, it ran for 96 hours in 70-80 degree temperatures set to 34 degrees and pulled the two Trojans T105s down to 12.68 volts. So less than 10%. I let them rest for about 24 hours before checking the voltage.

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 06/07/20 02:36pm Link  |  Quote  |  Print  |  Notify Moderator

Resize this......

A flooded battery can irreversibly sulfate it's way to death but show resting voltage as being "normal" full charge. Read nothing more or nothing less in your replies thank you [emoticon]

S Davis

Western WA

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Posted: 06/07/20 05:59pm Link  |  Quote  |  Print  |  Notify Moderator

MEXICOWANDERER wrote:

Resize this......

A flooded battery can irreversibly sulfate it's way to death but show resting voltage as being "normal" full charge. Read nothing more or nothing less in your replies thank you [emoticon]


What causes this to happen?

pianotuna

Regina, SK, Canada

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Posted: 06/07/20 06:21pm Link  |  Quote  |  Print  |  Notify Moderator

S Davis wrote:

MEXICOWANDERER wrote:

Resize this......

A flooded battery can irreversibly sulfate it's way to death but show resting voltage as being "normal" full charge. Read nothing more or nothing less in your replies thank you [emoticon]


What causes this to happen?


Not being fully charged, often from too low a charging voltage.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

S Davis

Western WA

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Posted: 06/07/20 06:33pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

S Davis wrote:

MEXICOWANDERER wrote:

Resize this......

A flooded battery can irreversibly sulfate it's way to death but show resting voltage as being "normal" full charge. Read nothing more or nothing less in your replies thank you [emoticon]


What causes this to happen?


Not being fully charged, often from too low a charging voltage.


Oh ok, my charger is charging at 14.75 Volts so that should not be an issue.

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 06/07/20 09:25pm Link  |  Quote  |  Print  |  Notify Moderator

That is a primary charging voltage. -- time limited. When proven good, the battery reaches full charge then loses it's surface charge the voltage algorithm can be used.

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