The x5 made it back to the house.

Picked up the battery from batteries plus at 12.36v. Installed it and drove 3 miles to the house. Let it sit one hour and the battery measured 11.7v.

Started it up and it went to 13.7v. And gradually increased into the 14's. When I reg the vehicle, the voltage drops back to 13.7v.

Also, the radiator can kicked on and the voltage dropped while it ran.

Does this make sense?