The AGM that's fitted has a maximum depth of discharge or usable capacity of about 50%
A lithium battery can safely be discharged to 80%-90%
50% of 95Ah = 47.5Ah useable capacity
80% of 110Ah = 88Ah useable capacity
Most users seem to say an AGM/LA battery needs to be twice the Ah rating. So a lithium 110Ah is easily = 180 - 200Ah AGM
The B2B also charges the battery extremely efficiently even on short journeys.
This is an interesting watch
Haven't driven my MP for a week and the voltage in that time is down from 12.7 to 12.2v (interestingly having recently posted about the Victron shunt, the SOC bar still says 90%??) so I need to decide soon whether to spend out what is quite an expensive outlay, but forget about battery woes for years. Or buy another AGM and have to replace in 2-3years time when lithium will be cheaper.
I'm hoping Tim Purslow (Webasto fitter} will be able to help but speaking to one of the tech guys when I booked it in I'm not sure, felt like I was speaking double Dutch when talking VSR's and B2B's with him.