The IP22 manual (Link) is a little bit vague on this point, but here’s what it says (page 10)
| Mode | Absorption | Float | Storage | Recondition |
|---|---|---|---|---|
| Li-Ion | 14.2V | Disabled | 13.5V | Disabled |
So there is no Float mode at all with Li-Ion mode set.
How long does it stay in Absorption mode before moving to Storage?
Adaptive absorption stage duration can vary between a minimum of 30 minutes, up to a maximum limit of 8 hours (or as configured) for a deeply discharged battery.
Alternatively, fixed absorption duration can be selected; fixed absorption duration is the automatic default when Li-ion mode is selected.
(page 8, emphasis mine)
There is also a mention of Absorption stage duration of 0.5 hours (page 16) but this was calculated for a 100Ah battery, and I’m not sure if this is just an example, or if the charger actually uses this algorithm?
I also have an IP22 with a 314Ah battery, and I noticed that Absorption stage lasts longer than 30 minutes, but less than 2 hours. I did not notice the actual time.
Bottom line: I think you would be fine with the Li-Ion preset, as long as you are patient and wait longer than 30 minutes for Storage mode.