MakeMePower
New Member
- Joined
- Oct 11, 2021
- Messages
- 55
so this has got me perplex. i have a 3 stage pd92145 battery charger that can do 45 amps. it is connected to a single agm battery about 15+ feet away with roughly 6 gauge wire. there is a shunt wired in on the negative side.
chargers are cc to cv i understand this
my issue
after diagnosing a bad agm in parallel (prolly would have caught fire) it was removed leaving what seems to be a healthy agm.
charging the battery it started around 30 amps at 13.5v, this confused me as the charger was outputting 14.4, ok so it voltage drop over the wires.
but here is where im getting confused, the amperage kept dropping yet voltage was only slowing climbing. I would expect the voltage to climb to 14.4, then amperage taper by going to cv mode.
so right now its sitting at 14.1 but doing 10amps.
so to add a little more to this. i threw a 100amp load tester on the battery while it was charging. voltage dropped to 12.8 but amperage went to 46amps.
what am I missing? if it was a voltage drop due to thin wires, i should not have been able to do 46 amps.
please someone shed some light here.
chargers are cc to cv i understand this
my issue
after diagnosing a bad agm in parallel (prolly would have caught fire) it was removed leaving what seems to be a healthy agm.
charging the battery it started around 30 amps at 13.5v, this confused me as the charger was outputting 14.4, ok so it voltage drop over the wires.
but here is where im getting confused, the amperage kept dropping yet voltage was only slowing climbing. I would expect the voltage to climb to 14.4, then amperage taper by going to cv mode.
so right now its sitting at 14.1 but doing 10amps.
so to add a little more to this. i threw a 100amp load tester on the battery while it was charging. voltage dropped to 12.8 but amperage went to 46amps.
what am I missing? if it was a voltage drop due to thin wires, i should not have been able to do 46 amps.
please someone shed some light here.