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
pnichols wrote:mena661 wrote:
FACT! 15+V into an AGM WILL pump current into them just like a wet cell. PERIOD!
Of course ... I never said my AGMs would not accept a lot of charge at 15+ volts. If a charger like this would also deliver large currents at 15+ volts, then thermal runaway would become a concern regarding my AGM batteries. Charging them with only ~13.8 volts not only charges them fast enough for our camping style - it also removes all concern for thermal runaway.
The label on them implies that this is not necessary, however. Like I said before, their label says to fast charge them using initial stage boost voltages of only 14.4 to 14.8 volts. I don't, because I don't need charging that fast.
Also, I would feel uncomfortable installing a built-in multi-stage charger in my RV with a wet cell maintenance stage of 15+ volts because of over-voltage concern about the RV's various 12V appliances and circuit boards.
Yep. Better to take your quicker rate of charge in the bulk phase... if you can.
Problem is...
A fast charger for 300A of AGMs would have to be about 100A. And in any C/3 case, the bulk phase wouldn't last long anyway. So there is little generator advantage to AGMs for RV purposes. Low maintenance for infrequent boondockers or interior or upside-down installations is where they shine.
