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hereandthere avatar image
hereandthere asked

equal temperature of batteries in a string

Hello all, does anybody have some knowledge about the importance of equal battery temperatures?

my setup contains 4 lead-carbon batteries in series, two at the floor and two above that on a shelf.

The two above will be warmed-up by the two below obviously.

The question is how much this is an issue?

thanks in advance!

AGM Battery
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2 Answers
pwfarnell avatar image
pwfarnell answered ·

Lead carbon will be a low resistance AGM battery and more prone to temperature issues. I would definitely recommend that you have temperature measurement on one of the upper batteries as the input to temperature compensation on your charger. I would also have a temperature sensor on the lower batteries. Then make sure your absorption voltage is at the lower end of the manufacturers range and make sure that you have a charger that can go to float when the batteries are full, ideally a shunt on the batteries to control end of absorption by tail current. If you do not charge aggressively then the upper batteries should not be heated by the lower batteries.

3 comments
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Alexandra avatar image Alexandra ♦ commented ·
Agreed. Since they need temperature compensated charging, temperature is important.
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hereandthere answered ·

Thanks nickdb ! I will get one


Best regards

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