"Though my system is a bit smaller than your’s (@200a/h LFP, 440w solar), the charge recovery advantage is substantial,"
Solar charging rate goes up till noon then back down in a bell curve. 440W of solar can do about 30 amps at high noon, pick 20 amps average for a mid-morning to mid afternoon time? Hard to pick a charge rate with solar.
Say there is 200AH of SLA and 200AH of LFP getting 20 amps for however long so they are getting the same amount of sunshine at whatever rate for the comparison. Say both are down to 30% SOC (60AH) at the start.
Allow that the LFP does constant 20 amps to about 97% SOC, but the SLA tapers in the Absorption stage at a lower SOC. We know that 20 amps is a 10% charging rate on 200AH and that Bulk will go to 90% SOC (180AH) with the SLA before amps taper. (At a higher charging rate, Bulk would end at a lower SOC, making the LFP look better, but this is with the 440w and the 200AH.)
So 30-90 SOC = 180-60 =120AH at 20 amps = 6 hrs. So equal charging time for the first 6 hrs and now both batts are at 90% SOC (20AH left to go)
The "substantial recovery advantage" is all in the time it takes to do that last 20AH if you choose to go that high in SOC.
That would depend on your definition of "substantial".
