Re: APC Smart-UPS float voltage experiment
Personally, I think the perfect float voltage is 27.27 volts. It should be high enough to stay out of the sulphation issue and gentle enough to make the batteries last a long time.
I have a SU300NET and added a potentiometer as a replacement to the R118 resistor so that I could adjust the voltage with a screwdriver. The original batteries were more then 2 litres low on electrolyte due to an improperly high float voltage (just short of 28 volts).
While you're in there be sure to check out R38...
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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