2023 Land Rover Range Rover Sport

I was driving my vehicle when suddenly I got a "electrical fault has been detected Pull over Safely" error message. At that time the everything is still running and working. I pulled over safely and shut off the car. I restarted it and it said "low battery, start engine". It was really cold and I imagine as the car kept running, that will recharge the battery. I continued to drive (cautiously on local streets) and about 20 mins later, certain electrical features like lane assist and traction control was not available. A few minutes later, more and more systems were being turned off. Eventually, the car's engine died and there was no electric power to the car. I lost steering and brakes. Everything in the car was electronically controlled. The car rolled to a stop but I was not even able to use my hazard lights. Luckily, it was during the day and I was able to roll to a stop and call for help. This is a safety concern if my engine stopped and I was in the middle lane of a highway. I'm unable to steer, brake, or show signs that I'm in trouble to those behind me. The car was eventually towed to a Land Rover dealer and the service rep said I would need my 48V to 12V DC to DC converter replaced. She has at least 10 other vehicles with this issue. The way the car is designed, when the engine is running, it's powering a 48v battery. The 48v battery then converts the electricity to 12v for all the components of the car. In my case, when the engine was running, it was not able to recharge the 12v battery at all. In a vehicle where EVERYTHING is controlled electronically (even the door handles), there should be a failsafe so the 12v battery can be charged when the engine is running but the DC to DC converter doesn't work. This is a serious safety concern if this happened I needed to avoid hitting pedestrians. The horn won't work and I can't roll my window down to yell.

Less than 2 hours before my car completely shut down while driving, I received an error message stating "Stop safely. Electrical fault detected." I immediately reached out to the service department who told they didn't think the car would have any additional issues and that I should bring it to the shop on Monday (the incident happened on Saturday). While driving down an entrance ramp to a major highway, my car shut completely off leaving me with no steering, brakes, emergency brakes, hazards or anything--completely dead to the point where absolutely nothing worked. I had to do my best to steer a dead car down an entrance ramp and onto a grassy area on the side of the highway as to avoid being hit by another vehicle or crashing into a vehicle or tree. The safety of myself and my family was put at risk because the car completely shut down leaving no emergency equipment for me to use. I had cars behind me, in front of me, and beside me on a busy highway with a speed limit of 70 mph. I was also going down a ramp with no brakes. At first I thought it was the battery as did the dealership, then they suspected the generator, then they said it was the converter. They were able to produce the same problem after the generator was replaced and the car only ran for 15 minutes. Unfortunately we sold the car within 2 weeks of the incident because we no longer felt safe, and the manufacturer has been replacing one part at a time with the most important part being on back order with no indication of when it will arrive.