NHTSA Complaint #11535407 — 2018 SUBARU OUTBACK

My vehicle just dies and leaves me stranded after turning off the car and leaving it overnight. This has happened many times, and I worry everytime I go camping or to some remote place where I may not have cell signal to get a tow truck to jump me. If I don't carry water and food, medicine, at all times, I fear what will happen to me if I am stranded and cannot get help on time. My car is 5 years old, I am on my 3rd battery. In every case, the battery should have been very well charged because it happens after highway driving for several hours. Suburu and the dealers try to deny that anything is wrong; but one of the rescue mechanics told me that the alternator seems to overcharge. Yes , I took the vehicle in for all inspection while it was under warranty. I reported these events to no avail. NO WARNING LIGHTS COME ON. I need to be able to get this fixed. How do I do that?