Alternator/generator/regulator problems of the 2017 Subaru Outback

Something (electrical issue?) is draining the car battery and needs a jump if not driven within a day or two. We replaced the battery twice within a year thinking we had a defective battery, but problem still persists. We took the car to a mechanic thinking it could be the alternator, but that was not the issue.

Battery failure after 6 months under normal use. No periods of leaving headlights on overnight, etc. Had just driven about 90 minutes, turned car off to run into a shop, returned and car wouldn't even crank. Aaa tested it and the alternator. Alternator was �good� but battery reported �fail�.

The battery has been replaced twice. The first battery was replaced after only having the car for less than a month and less than 6,000 miles. I'm having to replace the battery again after only 8,000 miles. The vehicle was parked in my driveway and had only been sitting for a day. I've taken the vehicle to two mechanics. The first mechanic determined that the electrical wiring in the doors was faulty. That wiring was replaced. The second mechanic checked the alternator, but said that the system was fine (was not able to recreate the problem or determine any problem).

At 35 months, the original battery in my Outback suddenly died and would not start the car. I can jump start the vehicle. After jumping the vehicle and driving around for 30 minutes, things seemed ok & the car started 2 hours after being driven. The next morning however, it was totally dead. Subaru service told me I needed to drive it at highway speeds for at least 45 minutes. So, I jumped it again and drove the vehicle for 2 hours at highway speed. Shortly after I returned from this trip, I had the battery tested at an auto parts store. I was told battery and alternator were ok, but it still needed charging. The car did start about 6 hours after returning from this trip. However, the next morning the battery was totally dead. I'm currently trying to work through this with a Subaru dealership, and have an appointment in 2 weeks. In the meantime, will try to keep the Outback in service with a trickle charger, and jump starts as necessary.

I believe there is a parasitic draw on the electrical system of my 2017 Outback (which I purchased in 2016). It has died repeatedly and randomly since I purchased it, failing to start after being parked for a few hours. More times than not now, it has happened when I'm in the backcountry (such as 05/28/2019), sometimes away from cell service. Initially, I brought it into the dealer and they were unable to find anything wrong, so I have continued to monitor it. Sometimes, it is "just" a dead battery that can be jumped (like 10/21/2018), but on occasion, the car will start momentarily but then the entire electrical system will shut down immediately (03/08/2020). Sometimes it is so drained that the car fob won't even work. Each time I take it to the shop (dealer or midas), they cannot diagnose any issue - "the alternator tests well, but something is draining the battery. " I have even purchased a new battery, which was supposed to last 5 years, and it failed in under a year. I keep my interior lights off and do not have anything extraneous plugged into the car, yet the problem persists - it happened twice yesterday (5/29/2020). I have recently learned that this is a well-known issue for Outback owners on various online forums and I hope that Subaru is able to do sometime to correct this problem - the reason I bought this vehicle was to have reliable transportation, which, unfortunately, it most certainly is not.