Latest Caravans and Euro 6 Car Engines

I recently stumbled across a post (dated 2017) that described problems caravaners were encountering following the introduction of the (then) newly introduced Euro 6 engines. Because of the regeneration system of the engines (to improve fuel efficiency), the car battery is kept partially discharged so the battery can take extra charge during breaking. This results in the battery voltage being "low" during cruising and therefore discharging the caravan battery to the same state as the car battery. I understand this has resulted in drivers arriving at their destination (particularly after long motorway runs) with a "flat" caravan battery that will not drive the motor mover and a defrosted fridge (which doesn't like whats going on). Additionally, there have been reports the ATC does not like this situation either and shows error codes.

Can anyone shed any light on this? Have the manufacturers of more recent caravans introduced design changes to their electrics to over come these problems (particularly Buccaneer)?