Included AC Charger
AudiWorld Member
Joined: Jan 2022
Posts: 497
Likes: 147
From: New Mexico, USA
In fact, being plugged in is a disadvantage (in my perspective)!
When plugged in, heating will be limited to what the charger can supply, in your case 1kW. This is likely configured this way to avoid depleting the battery state of charge during the preheating. Thus in really cold weather, the car will get warm, but it could take more than the 30 minutes max time for the heater function. Thus you meed to start heating multiple times, or set a departure timer.
When unplugged, you will get the max heating power of 5 kW (10 kW if you have the cold climate package option). That will get the car reasonably comfortable in 10-15 minutes, even in freezing temperatures. Thus you don't need to plan that much ahead, but you will loose ~2% battery charge during the preheating.
When plugged in, heating will be limited to what the charger can supply, in your case 1kW. This is likely configured this way to avoid depleting the battery state of charge during the preheating. Thus in really cold weather, the car will get warm, but it could take more than the 30 minutes max time for the heater function. Thus you meed to start heating multiple times, or set a departure timer.
When unplugged, you will get the max heating power of 5 kW (10 kW if you have the cold climate package option). That will get the car reasonably comfortable in 10-15 minutes, even in freezing temperatures. Thus you don't need to plan that much ahead, but you will loose ~2% battery charge during the preheating.
AudiWorld Member
Joined: Jan 2024
Posts: 285
Likes: 79
From: Oslo, Norway
Yes, the PTC heater in the HVAC runs on the high voltage DC rail, which again is connected to the battery - thus never right off the mains voltage. The car although was limiting the power drawn by the PTC to match the current delivered to that same DC rail by the AC/DC converter in the charger, making the supplied heating power equal the charging power during charging. Thus the battery was neither charging nor discharging in this setup.
The crucial part here is although the "was". Last time I checked this with diagnostic tools was back in 2020. When doing the same check this morning to get some graphs to demonstrate this (connected to a charger tuned down to 1.2 kW) that effect is no longer there. Heating runs at full power, even when connected to the charger. My car has although got various software updates throughout the inspections in these years, so likely something got changed there. This issue was one of the complaints in 2019 when the model went through it's first winter in the hands of customers.
The crucial part here is although the "was". Last time I checked this with diagnostic tools was back in 2020. When doing the same check this morning to get some graphs to demonstrate this (connected to a charger tuned down to 1.2 kW) that effect is no longer there. Heating runs at full power, even when connected to the charger. My car has although got various software updates throughout the inspections in these years, so likely something got changed there. This issue was one of the complaints in 2019 when the model went through it's first winter in the hands of customers.
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