Charging system service now

Has anyone had this come up on their dashboard I have a 2017 edge sport with 27000 miles on the clock and the garage says it needs a new alternator at £904.80 on anther ford forum people have said it could be a fuse or wiring battery module just wondered if anyone on here had had the same happened to them

Just saw your post, it's been a while since you wrote it. I have the same issue with my daughter's car, and I'm having difficulties finding out what he problem is. I have changed both the alternator and epu to bno avail. Anyone with any Ideas, please?
It's charging at 13.5 volts.