I have been reading the comments about charging and floating various batteries 
and just had to comment on the 'law of chemistry'.

All lead acid batteries whether they are gelcel, AGM or conventional deep 
cycle, all work because of that dreaded course you tried to avoid in school 
called chemistry 101.  Chemical reactions are effected by temperature.  Most of 
you see this coming already.  Yes, the float voltage for lead-acid batteries to 
achieve proper care does change with the battery temperature.

So, if your battery storage area changes temperature from summer to winter you 
should make a voltage adjustment.  Mine varies from 50's in the winter to 80's 
in the summer.  So I use the manufactures chart to adjust my float voltage 
accordingly.  My settings run about 13.8 volts winter to 13.3 in the summer.  
Your mileage may vary.

John - N0EVH
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