PD4655 Charging Graph
I have been reading quite a bit about different converters and charge rates, specifically some claims that PD's seem to drop off earlier than other brands. That is not what I have noticed on my setup,...
Forum Discussion
mena661 wrote:
PN, wets cells won't take any more current UNLESS you hit them with higher voltage same as AGMs.
I believe what I stated above about my AGMs is just the opposite: My AGMs won't take any more current once they're fully charged for dozens of hours on the 13.8 volt converter EVEN WHEN I hit them with higher voltage from the engine alternator.
My AGMs act the same if I charge them entirely to full with the alternator: Once their charging current drops to zero with the alternator (which hits them with 14.XX volts at the beginning just like a multi-stage charger starts out with), then they hit a hard stop on current acceptance. They will not accept any more current, per the ammeter, until I run them down some. They do not act like wet cell batteries.
In my ancient wet cell days when my batteries were fully charged and then put on a low voltage trickle charger, they would sit there and draw a small current, per the trickle charger's ammeter. They would never reach a point of zero current acceptance on the trickle charger. There appeared to always be some residual current flowing through their electrolyte even with the trickle charger's low voltage. The wet cells would never come up against a hard stop of zero current flow ... completely different than my AGMs.
I assume (oops) all AGMs act this way because of their chemicals being held in suspension by a matrix.
