Costco GC2 spec
I decided to replace the old GC2 batteries (4 years old). Costco's GC2's are now labeled Interstate Batteries. There isn't much data on the battery, just RC = 107. A "real" Interstate battery that ...
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Interstate Deep Cycles are made by USbattery, which has had a finishing 15.3v in their specs for a while.
I found my USbattery grp 31 needs the 15.3v, without it SG tanks, no matter how long it spends at 14.9v per day.
anything less than 14.9absv and 15.3v float/finish on my 31 kills performance, and voltage sag under minor loads becomes pathetic.
A few hours of 15.3v per day and this thing does tarzan yells while thumping its chest like a gorilla on meth.
Still needs 16v for 30 to 45 minutes after about 15 cycles to max out SG and reset performance
I found my USbattery grp 31 needs the 15.3v, without it SG tanks, no matter how long it spends at 14.9v per day.
anything less than 14.9absv and 15.3v float/finish on my 31 kills performance, and voltage sag under minor loads becomes pathetic.
A few hours of 15.3v per day and this thing does tarzan yells while thumping its chest like a gorilla on meth.
Still needs 16v for 30 to 45 minutes after about 15 cycles to max out SG and reset performance
