"one huge thing your missing is that your going off sales info"
So you didn't read my posts? :(
Good point you made about using FLAs now in the 5er and what would go better with LFPs instead. There is more than generator time savings to it all of course.
For example--- I have notes of one of my recharges in the 5er up-Island where there is a two-hour gen time rule 9-11 am. I set-up for that so I would not run out of AH. Quick version:
Temp 3C/35F, Bank about 600AH in the cold (est--came out more like 584)
26% charging rate with 150 amps of adjustable voltage chargers, set to 15.2V, Trimetric down 292AH at the start, 12.1 v "resting" so about 50%
0900-0931 Constant 150 amps (fiddling with voltage as temp comp some)
Amps tapered at about 61% SOC at 0931
0931-1100 amps down to 65 amps Trimetric says down -78AH, so 214AH restored and at about 87% SOC of 584AH
So how could that have gone better with LFP? Still need about 220AH usable that I can restore in 2 hours of allowed gen time.
It would not take as many AH in the bank, it was just over freezing, so you have the LFPs in where it is warmer.
I think you would want to pick an SOC operating range to fit that 220AH into. Then you could say how many AH of LFP you need.
eg if you picked 20-90 for 70% range, then if 70 is 220, then 100 is 314AH.
Now you need charging rate for 220AH in two hours on 314AH (you would not have 314 of course-some thing near that.)
Pretend constant amps for the 20-90, never mind Battery University--what do they know? :)
So two hours 220AH is 110/314 = 0.35C so you are good with that, being under 0.5 and you still have the 150 amps chargers and the gen.
You have lots of choices--use a higher charging rate and less gen time or whatever you think works for you with the LFPs.
--That is what I meant earlier by saying an LFP buyer would need to do some math for his own scenario.
