I wonder if my battery has issues, it’s the original EFB but when the car is started is running 14.7v. When turned off it’s showing 11.2v.
A static battery showing 11.2v is too low, you need consistently above 12v to have confidence in the battery. As it gets colder, it is likely the 11.2v falls a bit and the car just won't have enough battery power to turn over and start.
The reason it shows 14.7V is that the healthy alternator is partly sending power back to charge the battery, the fact that the battery only holds 11.2v after receiving this top up charge suggests it's on the way out.
With winter coming, I would change the battery now, before it lets you down.