Hi,
I've had them for a few months and been running down to only 30%, so far so good.
I've just added a fourth this week taking my installed capacity to 57.2KWh
My install is shared via VRMWorld
https://vrm.victronenergy.com/installation/238391/dashboard
18 x 660 Canadian Panels (North)
3 x Multiplus II 5KW
3 X 250/100 MPPT
3 X SolarMD 14.3KWh Batteries