Does a daily absorption time of 4-6 hours decrease the lifestime of Lithium 12,8V Smart batteries?
If yes, can we estimate to how much less cycles this could lead to (all else equal)?
Absorption voltage: 14,25V and Float voltage: 13,5V
Background:
I am designing a Lithium batteries solution that will replace Mastervolt AGM batteries (1.100 Ah) on a sailing vessel.
There are a few different charging sources that should be kept in place (Victron BlueSolar 75/15, Mastervolt Solar ChargerMaster SCM 25, Cristec YPower 40A shore-power chargers, Sterling AB1280 alternator to batteries charger on 80A rated alternator).
I plan to use two Victron Lithium 12,8V Smart 330Ah batteries in parallel (12V system), each Lithium with its own smallBMS and ATC/ATD Smart Battery Protects (dual bus system).
All chargers do a IUoU charging cycle with an absorption time of between 4 and 6 hours with each cycle.
As tail currents are (to my understanding) too high with the battery bank size configured (660Ah) for absorption cut off when batteries are full, I would expect a 4-6 hour absorption time for each cycle.
That should be ok (I guess) with alternator or shore power charging as this does not happen every day (based on the usage profile of the boat).
But with solar chargers (the boat will be located in the Mediterranean and Caribbean), there would be a daily absorption time of the 4-6 hours at 14,25V.
Absorption voltage: 14,25V
Float voltage: 13,5V
All Chargers (except Victron) can NOT be forced to shorter absorption times.
Do those long daily absorption times shorten the lifetime of the Lithium batteries?
If yes, can we estimate how much less cycles we should expect over the lifetime of the batteries (if all else being equal)?
