Winter is here! Heat pump comparison tests?

[jamelski]

I don’t see any difference is sound ect running my 24 on low in 100* weather vice running it in HI in 40* weather. Sound the the same and no NVH just the fan

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[rikster63]

My 2022 Tesla Model Y has a heat pump, and I can confirm it's VERY noisy at times when it's trying to cool the car down quickly. Driving the car, you can't hear it as much (though there is some vibration you can feel), but when you get out and the heat pump is still running it's obnoxiously loud.

I have a 2023 Lightning XLT SR, without the heat pump, and I'm honestly happy I don't have the noisy/vibrating heat pump system in it. I'm sure I'm pulling more juice from the batteries using resistant heat, but I never get anywhere near running out of charge on any given day, so it works well for me.

 

[Keanen]

Hello from Minnesota. I am interested in a comparison as well and I asked in a local Facebook group if anybody had a ‘24 lightning that they could compare against my ‘23. To perform some testing and capture results.

I believe we could do research around how quickly the trucks heat up and run them for a while to see how much the battery goes down with time.

If anybody here is from the Twin Cities area with a ‘24, please let me know!

 

[Evlar77]

Any comparison updates?

 

[Keanen]

We are trying to arrange dates here in Minnesota to see if we can pull it off.

Some of the struggles that we’re facing are, how do we get together without already having the trucks warm. I would like to compare how fast the trucks heat up from a cold state as well as some form of a range test.

Hopefully more to come in the next couple weeks.

 

[Altivec]

My 2022 Tesla Model Y has a heat pump, and I can confirm it's VERY noisy at times when it's trying to cool the car down quickly. Driving the car, you can't hear it as much (though there is some vibration you can feel), but when you get out and the heat pump is still running it's obnoxiously loud.

I have a 2023 Lightning XLT SR, without the heat pump, and I'm honestly happy I don't have the noisy/vibrating heat pump system in it. I'm sure I'm pulling more juice from the batteries using resistant heat, but I never get anywhere near running out of charge on any given day, so it works well for me.

I agree with you. I was debating between a 24 Flash and a 23 Platinum that they were offering me at basically the same price. I really wanted the heat pump in the 24's but there were just too many extra goodies in the Platinum to give that up, so I went with the 23 and no heat pump. Now that I hear about the noise, I am extremely happy with my decision. Like you, range has never been an issue.

Hopefully one of the review sites does a head to head comparison. Just for curiosity sake, I would be interested to see how much of a difference it makes in efficiency. The other thing I would be interested in comparing is the amount of heat, and which is faster at producing heat from dead cold.

 

[Keanen]

I think any comparison would have to be done in a highly controlled scientific way. In particular, two trucks would have to be on the exact same road at the exact same time. I say this because wind has a HUGE impact on efficiency at highway speeds. Even a slight breeze (or slight variation in driving speed) could have a much bigger impact than the heat pump.

For the heat pump alone to be saving 5 kWh / 100 km the resistive heater would have to be drawing 5 kW *more* than the heat pump the entire time. Assuming you're driving near 100 km/h. I don't know if the heater runs flat out even if it's -40 C. It certainly wouldn't when it's above zero.

I haven't looked in CarScanner yet to see if there is a value for energy used for resistive heat and the heat pump. If anyone has any hints to share, that would be helpful! Thanks.

 

[hajalie24]

I haven't looked in CarScanner yet to see if there is a value for energy used for resistive heat and the heat pump. If anyone has any hints to share, that would be helpful! Thanks.

Does preconditioning the battery use heat pump or resistive heating?

Does turning on climate control in the app also condition the batteries?

I'm thinking we can just turn on climate control and measure the power draw via the EVSE if possible. I currently don't have full 11 kW charging at home yet so my EVSE just maxes out whenever I turn on climate control remotely.

 

[XENOILPHOBE]

or @tommolog

I have the heat pump in mine, its down to 22F here in the Roanoke Valley at night, My Platinum driving on back roads doing average of 40 MPH has been doing 1.9 miles per KW.. I did pre-condition on shore power and that seems to help a lot. I don't really hear the Heat Pump, it has the same noise level as my mini-splits in my house...I just hear the fan running in the cabin, on the outside, I could care less what sound it makes, that is a problem for the pedestrians or a feature called the pedestrian warning system..

 

[kubel]

Does anyone know if pre-heating is as loud on non-max tow equipped Lightnings with heat pumps? I can't believe how loud this thing is, I can hear it from in the house.



I'm not experiencing the vibration issue others are. There's some vibration that makes it through but it's not significant- and I'm pretty picky when it comes to NVH. It's just REALLY loud fans.

 

[Maineiac12]

Does anyone know if pre-heating is as loud on non-max tow equipped Lightnings with heat pumps? I can't believe how loud this thing is, I can hear it from in the house.



I'm not experiencing the vibration issue others are. There's some vibration that makes it through but it's not significant- and I'm pretty picky when it comes to NVH. It's just REALLY loud fans.

That sounds like mine. I had a non-heat pump truck with max tow and traded for one with the heat pump and max tow. The heat pump truck is definitely louder. Mine sounds like a jet engine in the garage when preconditioning.

inside the cabin is fine and no vibration from the pump that I can feel.

 

[XENOILPHOBE]

My 2024 sounds the same, it's also the same sound my Bryant Evolution Extreme Variable-Speed Heat Pumps at home make when they run at 80%+ loads. Bryant has a quiet mode, but that cuts the efficiency, so I don't care how loud it is as long as its efficient.

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