Sorry to revive this old post but I have run into this same charging problem on my 2022 Rad Rover 6. I watched most of the videos on U-tube and this one shows how a guy revived a battery by jumpering his charger to the discharge terminals. I'm going to attempt the fuse replacement later today.

https://youtu.be/c6lHDhN6VMw?si=GKD1uR63ULm-1SQ8