Jeff i have tried desulfators, they only work if you have sulfide crystals on the plates and they take a long time to dissolve them. It won't bring plates back to life if they were exposed to air or material has fallen off plates from age. They also run the batteries down so you have to watch them and charge them more frequently. I have never tried chemicals but i do know if you dump the acid and water out the plates become damaged from air .
the 6x6V 185AH batteries are aug 22 put in service about dec 22 i bought the cart with batteries in mar 24
they were likely undercharged for most of a year because of poor connections in the charging system which i corrected
later on i found they were still undercharging and replaced the power wise charger control board
which (unknown to me until later) over charged them for a cpl months before i replaced them with Li
their capacity and performance began to drop suddenly about 3 weeks before i replaced them
the consensus was that they had sulfated
the desulfator i am using will also recharge after the desulf cycle
the resting voltage is always 6.3V after the charge cycle
the load tester i am using shows about 0.2 ohms for the load
the math says that should be about 31.5 amps during test for a 6V battery or 63.5 amps for a 12V
i have run the desulf cycle about 3 times per battery pair (it only works on 12V)
i have the batteries arranged so that each weak one is in a pair with a strong one
i can still tell the difference while testing each single 6V thru the whole 36V pack
do you think they may eventually recover ?
or am i wasting time ?
i was hoping to sell the pack as "used" at about 1/2 to 1/3 price
