how high a charge ?

[rob1234]

hi could anyone tell, me what is the max i should be putting into the leisure batteries ,,i have 2 130 ah ,,and a sterling b2b,,i have them charging mostly on solar ,,and the bms is showing 15v at times is this to much will it damage them ,,thanks

 

[PeterCarole29]

Are they lead acid vented or sealed

 

[PeterCarole29]

hi could anyone tell, me what is the max i should be putting into the leisure batteries ,,i have 2 130 ah ,,and a sterling b2b,,i have them charging mostly on solar ,,and the bms is showing 15v at times is this to much will it damage them ,,thanks

sealed lead acid is 14.1 and open is 14.8 for main charge and goes down when on float

 

[rob1234]

sealed lead acid is 14.1 and open is 14.8 for main charge and goes down when on float

thanks think mine are sealed ,,sure i can adjust the charge on the sterling ,,?

 

[Hoovie]

hi could anyone tell, me what is the max i should be putting into the leisure batteries ,,i have 2 130 ah ,,and a sterling b2b,,i have them charging mostly on solar ,,and the bms is showing 15v at times is this to much will it damage them ,,thanks

If you have temperature compensation on the charger, then the charger voltage can increase as it gets colder. The recommended charge voltage of say 14.4V will be at a battery temp of 20C. As it gets colder, that voltage ideally should get higher and when you get close to zero Celsius, it look like it is much too high compared to what you would expect.
That could be a reason why you are seeing a higher than expected voltage.

PS. Above is for Lead acid battery tech. you don't have the same temp compensation for Lithium.

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[Hoovie]

sealed lead acid is 14.1 and open is 14.8 for main charge and goes down when on float

Not sure if those values are right. many AGM batteries (which are sealed) have a standard charge voltage of 14.7V. very few Lead Batteries have a charge voltage below 14.4V

Best thing to do is check the spec sheets for the particular batteries installed to know what to set the charger at.

 

[PeterCarole29]

Not sure if those values are right. many AGM batteries (which are sealed) have a standard charge voltage of 14.7V. very few Lead Batteries have a charge voltage below 14.4V

Best thing to do is check the spec sheets for the particular batteries installed to know what to set the charger at.

Its very good advice to check what you have got and there recomendation as that wont be wrong
Are you thinking AGM batteries are the same as sealed lead acid as on the list i am looking at from my inverter charger quotes
Gel USA 14.0
AGM1 14.1
AGM2 14.6
Sealed lead acid 14.1
Gel Euro 14.4
Open lead acid 14.8
Calcium 15.1

 

[rob1234]

Hi its sealed lead acid hankook 130amp...temp thing sounds good ...in summer it was showing 14.5... i will try to reduce it to 14.1 as the above chart ,,,thanks

 

[rob1234]

hi i just changed the battery type to sealed ,,was on open ,,now reading 14.3,,hope it hasn't damaged them ,,they were never hot,, not sure if that proofs anything or not ,,