2025 Porsche Macan Electric 4S — anyone else: Old car was converted to 12V years ago — wiring is a mess

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2025 Porsche Macan charge sessions. I'd do that before spending real money. That's the whole play. Cold start is when I can actually reproduce it.

I'd treat 12V warnings as a no-ignore. On the 2025 Porsche Macan, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. I'd do that before spending real money. On “anyone else: old car was converted to,” that was the fork that mattered for me. This is from a 2025 Porsche Macan in Florida with 151,000 miles. Had a similar mess a couple years ago and that's what finally sorted it. This is the filter I use when the thread starts repeating itself. I already checked the easy fluid levels.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2025 Porsche Macan — site sharing and pack temp change the curve a lot. Then you'll know the next fork. Just my two cents from doing this recently. Next check is the cheap one I can do in a driveway.