I have a question regarding lead acid batteries, specifically regarding
the concept of holding them at a float voltage.
I am wondering what are the advantages and disadvantages of holding the
batteries at a float voltage as opposed to letting them self discharge
for a short while, say 24 hours, and then performing a charge top off.
The batteries are in a system that requires that they be maintained in a
readiness state, which is why I suggest only letting them self discharge
for a few days at most before performing a top off.
As I said, I am curious about the relative advantages and disadvantages
of the two methods. Does anyone have an insight or experience that may
help me decide which method to use?
http://www.batteryuniversity.com/partone-13.htm may help
After full charge, remove the battery from the charger. If float
charge is needed for operational readiness, lower the charge voltage
to about 13.50V (2.25V/cell). Most chargers perform this function
automatically. The float charge can be applied for an unlimited time.