Battery Load Shed Feature
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Once certain criteria have been met (such as low battery state of charge, time elapsed or an excessive percentage of charge has been drained) the audio system turns off to save the remaining battery charge. Under this condition, "Battery Saver - System Off" displays on the non-touchscreen display (FCDIM) to notify the driver that battery protection actions are active. To clear the load shed state, start the vehicle.