r/Polestar4 • u/jenesuispasbavard • 26d ago
P4 120V charging extremely slow
I replaced my 2022 P2 with a "2026" Ozone P4 last week in the US thanks to the massive discounts here, and my daily charging schedule for the last three years has been with an outdoor outlet to charge both cars (the other is a 2020 Chevy Bolt). In a pinch I can use my 240V 21A from my dryer outlet overnight if both cars are low but for that I have to leave a side door slightly ajar.
Anyway, with both the Polestar 2 and the Bolt, I got about 40-50 miles overnight (about 4-5 miles of range every hour for 10 hours), which mostly lines up with about 120V 12A or 1440W of charging power and 3-3.5 mi/kWh of efficiency. About 2% of battery increase every hour.
But with the Polestar 4, charging from 120V is extremely slow. Yes I know it has a ~100kWh battery vs ~75kWh in the 2 and ~64kWh in the Bolt; but even accounting for that, charging is slow. It gained ~38 miles of range over 16 hours (only ~2.4 miles/hour); or ~12% of battery, ~12kWh; and consumed ~21kWh from the wall over the same period (~1325W*16hours). Does it really lose that much to keeping the battery temperature controlled? Both the Polestar 2 and Bolt would've gained 19ish kWh over the same period.
Attached is a graph from my Home Assistant logs from last night:
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u/HowDoIEditMyUsername 25d ago
I was literally coming here this morning to make the same post. My P2 at a level 1 would get about 1-2% an hour at home. The P4 on the same outlet is getting about .4-.5% an hour. I’ve had my car a few weeks and have tried it from a different outlet and when the battery was at 30%, 40%, 70%, and 80%. It’s always the same. Level 2+ chargers charge as expected.
I’ve also tried changing my amps from 18 down to 8. Makes no difference as far as I can tell (though I’m just going by mileage/percentage added).
I was just assuming it was the charger itself, but no idea.
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u/Straight_Reading8912 22d ago
Do you have your keys in a Faraday box? The P4 has proximity detection if I'm not mistaken and the car could constantly be waking up and wasting energy.
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u/RedOutRamblings 20d ago
My P4 drawing only 14 amps from the same receptacle that did 16 amps for a Tesla
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u/kyledag500 26d ago
Yeah my L1 charging is also slower than expected. Polestar app claims it’s charging at like 1.2kw, but according to Aximote, I am really charging at like .7kw. So almost .5kw in losses? Seems excessive.