As far as I can tell its next year that manufacturers must comply with new vans besides its the manufacturers that must comply as the Standard only refers to the battery compartment requirement, certified Lithium battery with a certificate given to owner of van along with the requirement of the BMS system to be able to be monitored so everything is on the manufacturer to comply ........... 12v RV/vehicle wiring doesn't need to be installed or certified by an electrician as its under the 48v DC or somewhere around that level, any competant person can do it, so all it means is that when you buy a new RV that is certified under the relevant standard along with keeping your Gas Ticket, Electrical 240v compliance ticket handy you will need one for your lithium battery, of course the Electrical plate will refer to the current Standard ....... So basically nothing for the owner to do other than hold the tickets ....................... I very much doubt any inspections will be done and I have no incentive or motive to but a new van at any time so its all just information to me.............. My 12 year old rig actually meets the requirements other than the lithium battery being of the relevant certification, well I don't have anything to prove it anyway, no sticker or paperwork but it doesn't bother me one iota, its not supposed to cook so all good...... besides I have a WARRANTY.....
As for Insurance its all a wind up, manufacturers responsibility in the first instance to meet compliance which should be ticked off on registration, another form that should be kept is the roadworthy, if not they have committed a few offenses........
The lithium bursting into flames is the only major hazard which would be an insurance job relating to the standard, wiring doesn't need to be certified ............. if folk are concerned about Insurance then don't change tyres or rims, add boxes to draw bar, move gas bottles or do any changes from what was originally specced by the manufacturer as there would be an escape for any insurance mob..........