neilessex neilessex is offline

Hi Everybody

I have starting issues on my motorhome, i thought the battery was flat so i charged it and it made no different just clicking. I have a jackery power starter and i connected that and it started.
So i took it for a drive for 45 minutes got back parked it up and turned it off and went to start it again and it just clicks like the battery is flat i have had the battery tested and its good.
I disconnected the battery and confused as all the ignition lights are on radio still works and it try's to turn over, it seem like its trying to start from the leisure batteries(is that possible)
Its like the van isn't seeing the vehicle battery(weirdly)
Any idea would be great as i cant keep using the jackery to start it.

Thanks for reading and look forward to some ideas.

Regards