Recommend 12v/240v charger for continual use

I’m planning to put together essentially a UPS to power some networking gear from a 12v LiFePo4 drop in battery (capacity to be determined, but probably 50 or 100Ah, both of which are overkill) which is constantly trickle-charged / maintained in float by a mains battery charger.

Total expected load will be very small, probably less than 20W (so less than 2A @ 12V).

This will all be in a warm, dry location so IP rating is not particularly important. I’m sure pretty much any Victron charger would work but I’m slightly bemused by the range available and the prices which don’t always seem to reflect capability. I would like Bluetooth capability and quiet/fanless would be ideal - any suggestions or things to avoid?

All have Bluetooth.
Fanless → IP65 or IP67

Thank you - I’ve ordered the 12V/15A IP65 charger. Now to choose a battery!