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Old 01-17-2020, 04:42 PM   #31
HarryN
 
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Default Re: I overcharged my batteries

I wonder if the charger is working correctly. That is a lot of over charge.
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Old 01-17-2020, 07:47 PM   #32
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Default Re: I overcharged my batteries

I would scrap the batts in any case, not as if lead is safe once its SoH is that compromised.

Start out with a better quality set*

Then closely test & monitor the charger to see if it is behaving properly.

That Bogart's a great tool, are you also controlling solar with it?


*tbc
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Old 01-18-2020, 12:36 AM   #33
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Default Re: I overcharged my batteries

Quote:
Originally Posted by john61ct View Post
I would scrap the batts in any case, not as if lead is safe once its SoH is that compromised.

Yeh- they get ornery if they lose their Sense of Humor.
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Old 01-18-2020, 03:29 AM   #34
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Default Re: I overcharged my batteries

Quote:
Originally Posted by john61ct View Post
I would scrap the batts in any case, not as if lead is safe once its SoH is that compromised.

*tbc
Could you explain.

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Old 01-18-2020, 03:37 AM   #35
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Default Re: I overcharged my batteries

SoH = State of Health, % residual capacity from new

EoL should be 75-80%, no lower than 70%.

These are long past that, weren't great shakes to start.

Lead batts can explode.

Anything else?
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Old 01-18-2020, 03:32 PM   #36
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Default Re: I overcharged my batteries

Quote:
Originally Posted by john61ct View Post
I would scrap the batts in any case, not as if lead is safe once its SoH is that compromised.

Start out with a better quality set*

Then closely test & monitor the charger to see if it is behaving properly.

That Bogart's a great tool, are you also controlling solar with it?


*tbc
I am also controlling solar with it.

I thought the Fullrivers were a good battery. Are they really that bad?

New batteries were not exactly in the budget right now :/ Any recommendations on something decent that won't break the bank?
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Old 01-18-2020, 03:35 PM   #37
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Default Re: I overcharged my batteries

Gc2 flooded, Duracell brand.
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Old 01-18-2020, 03:42 PM   #38
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Default Re: I overcharged my batteries

Yes, the best battery value by far is Duracell (actually Deka/East Penn) FLA deep cycle golf cart batteries, 2x6V, around $200 per 200+AH @12V pair from BatteriesPlus or Sam's Club. Deka labeled same batts also sold at Lowes.

Even if everything keeps working well (dream on) IRL you need to plan on replacing a deep cycling bank every few years if used frequently.

Like tires and brake pads, batteries are a consumable.

A really high-end setup costing thousands, might get 8-10 years but that's rare, usually means pushing into the danger zone, past EoL 70% SoH.
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Old 01-18-2020, 03:58 PM   #39
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Default Re: I overcharged my batteries

Quote:
Originally Posted by john61ct View Post
SoH = State of Health, % residual capacity from new

EoL should be 75-80%, no lower than 70%.

These are long past that, weren't great shakes to start.

Lead batts can explode.

Anything else?
The explosion is a hydrogen explosion due to improper venting ie. H2 gas accumulates?
Does the battery explode itself or the hydrogen around it? Or both?

H2SO4 degrades? Leaves the Sulphate radical(SO4) on the lead plates and frees the H2 gas??

H2 is lighter than air so wants to vent up and out.

This is very interesting.

http://www.theaic.org/pub_thechemist...Article-4.html

I really like John61's idea for consideration of a house battery as a consumable. A vehicle battery less so due to it's location.
My FLA deep cycle living under the passengers seat needs that consideration.


bill
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Last edited by billintomahawk; 01-18-2020 at 04:48 PM.
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Old 01-18-2020, 04:25 PM   #40
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Default Re: I overcharged my batteries

There are many causes and failure modes, "explosion" is just the extreme end of "rapid decomposition with high energy release".

More relevant maybe to just say, assuming the battery starts off as high quality, and the infrastructure is sound

unexpected failure is a symptom of improper care

not testing / monitoring / tracking performance properly

and not proactively replacing the batteries early enough.

By the time symptoms of EoL are gross enough, you've passed the point of predictability.

In a well managed setup, there should be no surprises.

Just waiting to replace after complete failure is asking for trouble.
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