They are rebranded Battle Born batteries.Will you look at this little beauty? Low maintainance but very expensive to own. https://www.transporterenergy.co.uk/buy-now
Quick question, have you checked the road legal conformity for these units? CE marks are for transportation and not intended use. You need to be looking at E13 with certification to prove they've been tested. Your risk and a non-void insurance pay-out if they're not road legal (from Aviva whom underwrite a lot of motorhome policies, after the lengthy meeting we had at the NEC - along with the normal Thatcham jargon).
As far as I can make out there's been no mention of dynamo or current as yet......
Oh good, now we can bring B2B chargers into the conversation. I chose a Votronic 1212-45 because it has a good range of LiFePO4 profiles and can be input and output limited to fit the 50A circuit I spliced it into. Very good it is too, fully recharges the battery very quickly.And just on the last point, even if your alternator does hit over 14.2V, voltage losses over the extended cable to the leisure battery bank may well mean that bank is gettig a reduced voltage charge and so not the full deal