Questions About Iota's AGM Profile

[BFL13]

How does the IQ4-AGM actually work? It says it skips the Bulk Stage (getting the battery to 14.6/8) and goes straight to the Absorption Stage (14.2v with regular IQ4 that runs for up to 8 hours)

How long does it really stay at 14.2v (or whatever voltage the IQ4-AGM does)?

This suggest the IQ4-AGM may have a higher voltage? (and also drags us into the discussion from last year)

https://www.coastresorts.com/cforum/index.cfm/fuseaction/thread/tid/29601119/print/true.cfm

Usually AGMs require holding the charge at 14.4ish (some want 14.8ish) until amps taper to 0.5a/100AH. so you need an ammeter to tell when you are down to 0.5a/100AH of bank.

8 hours might be long enough depending on how many AH of bank, etc. What would make the IQ4 drop to 13.6v before the 8 hours is up like it suggests "up to 8 hours"? Would that be before you get to 0.5a/100AH?

Is it possible to do 05.a/100AH at 14.x with that IQ4-AGM? If yes, what is its real charging profile? The specs are not clear.

Thanks

[BFL13]

The link in the link above says the IQ4-AGM first does a Bulk/Finish stage at 14.7 where it gets the battery to 14.7 and then holds that for a "predetermined time" as the Finish Stage, then drops to Float.

That contradicts the blurbs that say it skips the Bulk Stage and just does the Absorption Stage. eg Amazon "product description" here:

https://www.amazon.com/Iota-Tailored-Absorption-Charger-Chargers/dp/B07DFLW1JL

Very confusing. Does the "predetermining" have anything to do with 0/5a/100AH?

This one copies from the Iota "Flyer" on the new IQ4s, calling it an "Absorption charger" And says it skips the Bulk Stage and does an optimimized Absorption Stage (contrary to the other Iota blurb that says it does Bulk/Finish and goes to Float)

https://www.solar-electric.com/iota-iq-agm-dls-controller.html