So I have a NOCO Genius 10 hardwired into the truck. I have it plugged in for the night to hopefully get the batteries topped off and then do a BMS reset in the morning before leaving to go to work. From my understanding, this will also reset the BMS so that it knows there are new batteries instead of the aged batteries that has been in the truck.

I'm still not sure about the "Battery State of Charge, %" either... It may have something to do with the smart charge capabilities on the alternators, or something to do with "house" batteries when hooked up to a camper... I don't know.

 

Who would have ever thought batteries would be so controversial?! I am planning on getting Walmart AGM's also.

 

I just emailed Bearded Ford Tech about the Battery State of Charge %. He said that he sets his fleet of trucks to 100% as he believes 120% is too high.

 

I just changed my setting to 90, FLA batteries

 

Seems like the more advanced these trucks become, the more questions and complicated everything is. Sometimes I think just do the needed maintenance and just drive it.

 

Changing the batteries is part of the "needed maintenance" for the truck.

Getting the charging rate right is "needed maintenance" for the batteries.

 

I read somewhere else that AGM batteries discharge faster than FLA batteries if not used for a while. My 2019 F-250 PSD sits for a week at a time without use, would this be an issue?

Thanks.

 

Do they run flooded or AGM?


IIRC you are running Odyessey AGM batteries. What did you set the “State of
charge” setting to on your truck?

Thanks,

Bob

 

But nobody knows what the proper charge rate should be unless I'm missing something? And what about other vehicles where you can't change the charge rate, how do they handle AGM batteries?

 

Yes, that’s really the big question. I expect that it is different for AGM and Flooded batteries. I also think that fuel economy is also factored into Fords algorithm..

When I install mine in plan on changing the battery type to AGM, resetting the BMS, and then checking on the SOC parameter. If it is still 120% I will drop it to 90% as @WXboy did.

Bob

 

Vast majority have no idea what the correct charging rate is (even on this site) or even know how to change it. That info is becoming more known on this site but for the average owner that isn't on this or other forums it is an unknown. I agree changing batteries is normal maintenance.

 

Good question. I'll ask him. Most of his fleet are emergency vehicles (Ambulances) so with the high electrical demands of those vehicles I would think so.

 

That idea is inversed. The exact opposite is true. FLA batteries discharge faster than AGM batteries.

Enersys states that their Odyssey Extreme AGM batteries can sit for up to two years without a charge (as long as they are without a parasitic drain).

East Penn states that their Deka Intimidator AGM batteries have seven times the shelf life of even a deep cycle FLA battery.

The batteries used in emergency exit signs, uninterruptible power supplies, telephone company switching and back up power, aircraft, submarines... are valve regulated lead acid (VRLA) absorbed glass mat (AGM) batteries.

The more expensive versions with higher cranking amps are also thin plate pure lead (TPPL). The thinner plates allow more plates to fit in the same Group Size form factor, and the pure lead (as opposed to an amalgam of recycled lead with random impurities) enables these thinner plates to maintain their structural integrity during the cycling of lead sulfate formation on the plate grid surface.

An AGM battery is starved of acid, all of the electrolyte is absorbed into the glass fiber mats, which protects the plate during deep discharges. Another type of VRLA battery that is sealed is called a GEL battery. The thixotropic nature of gel also acid starves the plates which protects the plates better than wet cell liquid acid batteries. But in really cold temperatures, the GEL batteries don't work as well, whereas the AGM batteries work well in extremely cold environments.


If there is a parasitic drain, any issues will be commensurate with the current draw of the parasitic drain. Modern vehicles, especially Fords, are always talking to Big Brother... ratting us out. Ford freely and surprisingly often admits to monitoring and tracking customer usage of various features on the vehicle, as well as the frequency and surrounding circumstances within which the features are used.

When Ford announces that they have discontinued a feature in future product, Ford has often cited the justification for the decision being based on the usage data that Ford has collected from the telemetry data broadcast by the vehicle.

Since we have no way of knowing when or how often this data is collected about us and our usage, it may not even be possible to determine a definitive current draw, as that could change... as modules go to sleep, and wake up again, at will, or for good reason... like security.

In any event, I personally would be more comfortable with an AGM battery sitting for a week at a time, then a FLA battery sitting for single day under a Ford hood in the 2017-2022 model years. The frequency of evidence of prolific outgassing of FLA batteries, corroding battery terminals and hold down brackets within 2 years is hard to ignore.

A recombinant battery, such as an AGM, reabsorbs the outgassing from charging, as long as the charging voltage is strictly maintained within the range that a sealed battery can tolerate, so as not to overwhelm the rate in which the mats can actually accomplish the absorption.

 

I emailed Bearded Ford Tech and he said yes, they use AGM's.

 

I've read that also, that AGM's have a much lower discharge rate just sitting without a parasitic drain.