Originally Posted by PaulGrun

Do you know for sure what changing that Forscan parameter actually does? As far as I know, there is no publicly available documentation on it. There is, however, very good reason to suspect that it doesn't do what the conventional wisdom thinks it does, i.e. change the static SOC level at which the BMS maintains the battery. There is good reason to believe that this parameter is used by the BMS, for example, to decide when to run a de-sulfating cycle on the AGM battery. If that is true, it seems possible or likely that monkeying with that parameter may impact the longevity of the battery, but is very unlikely to change the observed SOC..
A few years ago there was a rash of reported battery problems, particularly with the Powerboosts. As far as I know, those in the consumer world who carefully experimented with that parameter, have reported that changing the parameter has NO apparent effect on the battery's SOC. It just doesn't seem to make a difference.
However, there is good reason to believe that Ford did indeed make a substantial change to the vehicle's charging strategy a year or so ago which seems to have greatly reduced the incidence of battery issues being reported on these forums.
Long story short - without having insight into the deep details of the engineering behind the BMS system (Ford engineers are not dummies and would not likely have overlooked something as simple as changing the Forscan parameter), and particularly without clear knowledge as to what the Forscan SOC parameter does, it seems either not useful or possibly damaging to monkey around with it.
YMMV..

Originally Posted by Djw.pro

Yes, we know what it does. It changes the target charge. You are not recoding how the system works you are just telling it to target 95% vs the default 80%. The BMS is setup for gas mileage savings, nothing more. It’s also helpful since I have an H9 900 CCA.

Let me put it this way, after marking the change my 10amp smart charger takes 25 - 45 min to fully top off my rather large battery depending and how long it has been sitting. Before that change it would take 3 - 4 hours.

Originally Posted by HammaMan

Those are 2 12v 7.5ah AGMs wired in series to create a 24v transient buffer for the 2nd alternator that runs at 24v for powering the 2kW PPOB inverter your truck comes with.

Originally Posted by PaulGrun

If I may ask, how exactly do you know what that parameter controls? So far I’ve seen zero documentation that suggests it does what you think, but I have seen documentation indicating that it relates to the need to de-sulfate the battery periodically.

Originally Posted by FaaWrenchBndr

So with all this battery talk in state of charge I have a question. I was looking into getting the ForScan and doing some work. The more I looked into the batteries, it seems that the AGM batteries are only charged to 80% to increase life. I have read that changing this to 90 or 95% will degrade the batteries because of the charge memory.

Anybody heard anything about this or this bull****?