Most efficientbsetting for heat pump?

[Bp25]

For ultimate longevity and efficiency, turn it off.

Even then, the heat pump will run to maintain battery temp

 

[Foxsbiscuits]

Even then, the heat pump will run to maintain battery temp

There's no escape!
That's why I remove the battery from my Tesla each night

 

[mborkow]

There's no escape!
That's why I remove the battery from my Tesla each night

That seems sorta like a PITA…possibly you could just trip the pyrofuse each night and replace it in the AM?

 

[Foxsbiscuits]

That seems sorta like a PITA…possibly you could just trip the pyrofuse each night and replace it in the AM?

Lifting the battery out keeps me fit. I'm surprised no-one else upgraded to the two battery system, the salesman said it's the best way to do it, drive one while the other charges. Half the battery degradation.

 

[Big Earl]

Rich Rebuild earlier videos was that at the super chargers, to improve charging speed, set your heat to maximum. Well, from experience, it's a very bad idea. lol....This will wear down some components faster than others leading to premature failure. Some of his videos, you need to take a step back and think about it for a second.

Probably don't take advice from Rich. Changing the interior HVAC settings will do nothing - nothing - for battery conditioning.

On heat pump cars, it can actually do the opposite. In normal operating mode, the heat pump will steal heat from the battery to put it in the cabin. You could actually be cooling off your battery when you set the cabin to a higher temperature.

If you want to heat your battery, navigate to a nearby Supercharger. Easy.

 

[cmaster]

I think the auto will adapt to the

Probably don't take advice from Rich. Changing the interior HVAC settings will do nothing - nothing - for battery conditioning.

On heat pump cars, it can actually do the opposite. In normal operating mode, the heat pump will steal heat from the battery to put it in the cabin. You could actually be cooling off your battery when you set the cabin to a higher temperature.

If you want to heat your battery, navigate to a nearby Supercharger. Easy.

Absolutely. There are definitely new owners out there probably has no idea that increasing the temperature will adversely affect the hardware.

 

[taraquin]

I visited a friend with Model Y, entered the service mode and got some answears

Fanspeed is somewhat linked to compressor rpm. For instance at 21C auto high fanspeed ran compressor at 6000 rpm, low ran it at 4500. In manual mode fanspeed of 1 ran it at 2800-3300rpm, fanspeed of 6 at 4500-5000, it varies a bit, but hovered around that. As for consumption fanspeed of 1 pulled 1850-2100W from wall, fanspeed of 4 pulled 2100-2350W, but it may have been more at times as charger was limited at 2400W. Gastemp and pressure had a steady state of 24bar and 78C, but varied a bit from 70-80C for a few seconds if we changed temp or fanspeed.

Seems lower fanspeed is indeed easier for the compressor and gives a slightly lower consumption, gastemp and pressure seems the same no matter what fanspeed you run, but the difference in consumption is smaller than with PTC-heater where you get a massive increase in consumption if you run high vs low-fanspeed. Maybe due to heath being stored in the liquid vs a basic resistanceheater that has to work harder the more cold air passes through?

 

[taraquin]

And just for clarity - Auto low/med/high fan sets the maximum that auto will run. So when I have it Auto High it can still run low, as it does for most of it.

Yeah, it seems so. Running high will increase temp faster at a somewhat higher consumption, but at steady state high and low will behave similar.

 

[Big Earl]

I visited a friend with Model Y, entered the service mode and got some answears

Fanspeed is somewhat linked to compressor rpm. For instance at 21C auto high fanspeed ran compressor at 6000 rpm, low ran it at 4500. In manual mode fanspeed of 1 ran it at 2800-3300rpm, fanspeed of 6 at 4500-5000, it varies a bit, but hovered around that. As for consumption fanspeed of 1 pulled 1850-2100W from wall, fanspeed of 4 pulled 2100-2350W, but it may have been more at times as charger was limited at 2400W. Gastemp and pressure had a steady state of 24bar and 78C, but varied a bit from 70-80C for a few seconds if we changed temp or fanspeed.

Seems lower fanspeed is indeed easier for the compressor and gives a slightly lower consumption, gastemp and pressure seems the same no matter what fanspeed you run, but the difference in consumption is smaller than with PTC-heater where you get a massive increase in consumption if you run high vs low-fanspeed. Maybe due to heath being stored in the liquid vs a basic resistanceheater that has to work harder the more cold air passes through?

Lower fan speed means the heat exchanger can't do as much work, thus lowering the compressor load. The more effective method of managing comfort and energy use is by adjusting the temperature setpoint.

When in fresh air mode, higher fan means more outside air that the system needs to condition, so a higher fan speed will reduce system efficiency compared to a lower fan speed. That said, it reduces the system's ability to control comfort.