Can't charge the leisure battery from the engine

[kevin1000]

I've just purchased an ex demo T7 Ocean Diesel and after the 2 hour drive home from the dealers I checked the battery levels and was suprised to see that the leisure battery was on 20%. I was expecting it to be full after such a long drive.

I've tried and EHU and it charges fine that way. I then went back to trying to charge it using the engine by starting the engine and checking the display. As the images show below, at first I got the expected behaviour, engine power was providing 30A and the leisure battery recieving 25A. But after a few seconds the engine power dropped to OA and the leisure battery quickly when back to -0.2A (the image shows 0.7A but I was abit quick with the camera!) . It would appear that I am unable to charge the leisure battery from the engine for longer than a few seconds.

Any suggestions? I'm new to the vehicle so could I be making a silly mistake somehow?

 

[Perfectos]

13.3 v is fully charged with 25hours of estimated charge remaining!

What does the LB & starter show after 30 minutes with engine fully switch off and no load on the LB , I.e. nothing being used or plugged into 12v sockets

 

[kevin1000]

13.3 v is fully charged with 25hours of estimated charge remaining!

What does the LB & starter show after 30 minutes with engine fully switch off and no load on the LB , I.e. nothing being used or plugged into 12v sockets

Unfortunately since doing the last test I have had the vehicle on EHU. I'll take it off the EHU, take a picture, then leave for 30m, take another picture and report back! Thanks for the response.

 

[kevin1000]

13.3 v is fully charged with 25hours of estimated charge remaining!

What does the LB & starter show after 30 minutes with engine fully switch off and no load on the LB , I.e. nothing being used or plugged into 12v sockets

So the following 3 images are with the engine off, no load and no EHU. The first at 5:10pm, the second at 5:52pm and 3rd at 8:34pm. Does this information help explain why I cant charge the leisure battery from the engine? Thanks again for your help!