agm battery charge issue
what would cause a AGM battery to reduce its charging amperage, without the voltage reaching the set voltage cutoff in a CC mode stage of a charger example, battery is at 13.6 yet a pd9245 in boost...
Forum Discussion
LittleBill wrote:
so my voltage drop only becomes a problem at 80% charge and not 20% charge? Yes at lower state of charge and even lower battery voltage the PD is not able to hold the voltage at 14.4 so the max amps flow.
my voltage drop is increased at the lower charge, why is it not affected there then? The voltage drop is fine until the PD hits the 14.4 limit and the amps start to taper.
the voltage drop is a sliding scale, shouldn't it be moving uniformly? As long as the PD is held lower than 14.4 volts the amps are at a fixed 45 maximum so everything is linear until the PD hits the 14.4 limit.
By reducing the voltage drop the PD will continue at maximum amps for a longer period into the charge cycle.
How large is the wire? How long is the wire?
20' charging loop of #6 wire will give .71 voltage drop. Plus a few connections and the circuit is at .8 volt drop. This is common for many RVs and makes fast charging a battery difficult.
