One thing to keep in mind is that battery voltage changes with
temperature, and any float or trickle charger that doesn't take this
into account can shorten a battery's life considerably. So if you want
to get the longest life from your battery, you should make sure the
charger is properly temperature compensated.
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Roy , If the lead acid battery charging current is limited to 0.1C ,(example
a 15Ah sealed battery is charged at max 13.8 V with a current not exceeding
1.5A) is temperature compensation then still a necessity to optimise the
battery's (usable) life ?
And if it is, in which temperature range ? I have not found this info
through Web based tutorials.
I am very interested in this topic since I charge a number of batteries
(some non- sealed some sealed) by means of a (150 W max)wind generator and
2 pcs 64Wpeak solar panel.

TIA for any advice

Frank GM0CSZ / KN6WH