What is the life of gel batteries? (8 Viewers)

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Mar 30, 2022
1,773
1,821
Funster No
87,744
MH
Swift Suntor 590RL
I'm having trouble following you as well?
How have I drained my batteries too quickly - unless you are referring to trying an inverter which turned on and instantly off and I am not doing anything to charge the batteries other than using the CTEK equipment as it was designed and professionally installed?
I am asking them for their opinion on the fact that it has been suggested to me that they can output too much current for the job they are designed for and could therefore have overcharged my batteries.
What I am saying is that you are the user therefore it is up to you to ensure that what you are doing is within the battery recommended specs.
Any problems caused by not staying within the specs of the battery are down to you.
I am sure that is what CTEK will say.
CTEK made the charger, they can't be held responsible as to how you have used it.
 
Apr 26, 2015
3,383
8,072
Ottershaw
Funster No
36,067
MH
Hymer S820
Exp
First motorhome May 2021
Autorouter has basically said this twice:

Your batteries should be charged at no more than 40a for the pair (20a each).

Your setup has been charging them at 100a.

QED.
I have to say I don't understand this, I was under the impression that the rate a lead acid battery charges at is defined by its internal resistance, which is why the current reduces as the internal resistance increases as it becomes more charged, are you saying it's possible to push more amps into a battery then its internal resistance would allow? My B2B can provide a 30 amp charge but when I had gel batteries if they were only a little discharged it would only provide 8 amps and I never saw more then 18 amps when they were down to 50%.
 
Sep 4, 2017
363
976
North West, UK
Funster No
50,345
MH
VW T6.1 Transporter
Exp
Never stop learning šŸ˜Š
This might be apples & oranges, but I have a small gel battery in a ride-on lawnmower; the mower is used a couple of times a year to cut a meadow and the rest of the year has a tow hitch and drags a small trailer around.

It lives in a non-insulated shed hooked up to a Ctek unit when not in use.

Both the battery and Ctek are at least ten years old . . . (and the only occasion the engine did not start first time was because we'd missed an annual service and it needed some TLC).
 
OP
OP
TheLifeofBrian
Sep 7, 2020
322
271
Funster No
75,586
MH
Hymer T588SL
Exp
Getting there!
I have to say I don't understand this, I was under the impression that the rate a lead acid battery charges at is defined by its internal resistance, which is why the current reduces as the internal resistance increases as it becomes more charged, are you saying it's possible to push more amps into a battery then its internal resistance would allow? My B2B can provide a 30 amp charge but when I had gel batteries if they were only a little discharged it would only provide 8 amps and I never saw more then 18 amps when they were down to 50%.
I have to say that's exactly how I understood it šŸ¤”

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Mar 30, 2022
1,773
1,821
Funster No
87,744
MH
Swift Suntor 590RL
Yes I obviously bugger my batteries up on purpose šŸ¤£šŸ¤£šŸ¤£šŸ¤£ and only Ā£400 a time!
So what you're saying is that if you get done for doing 100mph it's not your fault it's the car manufacturers fault for making and selling a car capable of breaking the speed limit.
 
Jan 19, 2014
9,925
26,469
Derbyshire
Funster No
29,757
MH
Elddis Accordo 105
Exp
since 2014
So what you're saying is that if you get done for doing 100mph it's not your fault it's the car manufacturers fault for making and selling a car capable of breaking the speed limit.
Not quite, he didn't know he was doing 100mph šŸ˜œ

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OP
OP
TheLifeofBrian
Sep 7, 2020
322
271
Funster No
75,586
MH
Hymer T588SL
Exp
Getting there!
So what you're saying is that if you get done for doing 100mph it's not your fault it's the car manufacturers fault for making and selling a car capable of breaking the speed limit.
I think we may be talking at cross purposes here.
How am I able to alter how much charge the CTEK units are putting into my batteries? And how am I responsible for them doing that?
 
Mar 30, 2022
1,773
1,821
Funster No
87,744
MH
Swift Suntor 590RL
I think we may be talking at cross purposes here.
How am I able to alter how much charge the CTEK units are putting into my batteries? And how am I responsible for them doing that?
You can't alter how the charger works but the onus is on you to ensure that the charger is suitable for your needs.
If it is not then it is your problem not the charger manufacturers problem and you have to suck up the result.
I cant see you getting anywhere with CTEK.
I suppose you could try the "professional " who fitted the charger ?
 

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