Alternator & ChargingDiagnostic helpCommunity Starter

2025 Porsche Macan — fast charging tapers earlier than it used to — second opinion before I spend money

WeekendDriver470Community StarterApr 19, 20262025 Porsche Macan Electric 4SCharlotte

2025 Porsche Macan Electric 4S, about 3,500 miles. On comparable road trips the charge rate now starts tapering sooner. I am trying to separate charger sharing, battery temperature, software changes and actual battery health. I am in Charlotte.

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2023 Porsche Macan

$799/mo

Brooklyn, NY

1 replies

CleanGarageCommunity StarterCommunity StarterApr 20, 2026permalink

If it were in my driveway, two 2025 Porsche Macans can feel identical and have different causes, so measure before you copy someone else's repair. If the cheap test changes it, stop and reassess. That's the sequence I'd use. Doing the boring step first on purpose.

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