Jumping-in, Steve says...

"Frank Dinger" wrote in message
news:EAo%b.20992$ft.6377@newsfe1-win...
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.
=======================================
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 ?

It is the 13.8 voltage limit which must change as the temp changes. The
current limit, I believe, is less of a problem. The lead acid should be
able to take quite high current when it is still charging (in need of
charge) - when it is, it is converting the current into chemical
stored-energy.
This is what the common 'Sears' chargers do. Hit 'em with volts to get
lotsa' current to charge them quickly and make the human responsible for
"stopping at full charge".

--
Steve N, K,9;d, c. i My email has no u's.

When it reaches full charge, then it is producing H & O while decomposing
the water -- and probably heat.

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