Powermax 75 amp converter/charger
I am charging a pair of Trojan T-105 batteries, they were drawn down to 12.38 or 6.19 per battery which should be about a 30 percent discharge. The powermax is only putting out about 13 amps @ 14.68 v...
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A pair of gc-2s at a rested 12.38v, which only require 13 amps to be nearly instantly brought to 14.68v, are sulfated.
If they were healthy, I'd expect it to take at least 45 minutes or more for amps to taper to that level with 75 amps of charger available seeking 14.68v.
The hydrometer will reveal the truth, and you can then ask about or search for recovery procedures which might or might not be effective, depending on how hard the sulfation is.
I've a newish healthy single group 31 TPPL AGM and 134 amps of plug in charging source, at 11.90v starting point, 134 amps was not enough to achieve 14.7v at battery terminals instantly. The breaker blew and then 'only' 94 amps still took nearly 10 minutes to bring the voltage to 14.7v at which point amps started tapering.
This is a powermax adjustable voltage 100 amp model, and low input voltage is responsible for 94 amps instead of 100. A new 12AWG extension cord and it made 98 amps. I had it in parallel with my 40 amp Meanwell for those 134 amps into a depleted but healthy group 31 TPPl AGM.
How many amps it takes to bring a battery to a certain voltage is indicative of state of charge and state of health of that battery, and the more experience with that charging source on that battery, the better.
If they were healthy, I'd expect it to take at least 45 minutes or more for amps to taper to that level with 75 amps of charger available seeking 14.68v.
The hydrometer will reveal the truth, and you can then ask about or search for recovery procedures which might or might not be effective, depending on how hard the sulfation is.
I've a newish healthy single group 31 TPPL AGM and 134 amps of plug in charging source, at 11.90v starting point, 134 amps was not enough to achieve 14.7v at battery terminals instantly. The breaker blew and then 'only' 94 amps still took nearly 10 minutes to bring the voltage to 14.7v at which point amps started tapering.
This is a powermax adjustable voltage 100 amp model, and low input voltage is responsible for 94 amps instead of 100. A new 12AWG extension cord and it made 98 amps. I had it in parallel with my 40 amp Meanwell for those 134 amps into a depleted but healthy group 31 TPPl AGM.
How many amps it takes to bring a battery to a certain voltage is indicative of state of charge and state of health of that battery, and the more experience with that charging source on that battery, the better.
