My 2025 Heat Pump Efficiency data thus far

[GreaseMonkey]

Is the battery percentage more accurate? I wasn't looking at the GOM range number, but the % of battery at the start and end of the ride assuming it was more accurate. If you think miles per kwh from the trip app would be more accurate, I'll add that to the data set.

Interesting. Sorry if I misinterpreted. I don’t know whether % battery spent or car’s m/kWh are more accurate. I would think the most accurate would be capturing the energy to recharge to 90%. Like what we used to do with ice in the old days: pump at the same station to the first click, drive then pump again and do the math manually. I don’t know if any matter as long as you’re consistent. But GoM is particularly inaccurate.

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[tminter4]

How does the 2025's heat pump affect driving range in the 2025 Mach E? I've been collecting data to try to help shine a light on this question. I'll share my approach and findings thus far.

I should note that I live in New York's Hudson Valley, where we get nice cold snowy winters. First, I wanted to eliminate as many variables as I could so that the only major difference from day to day would be the daily highs and lows. I tracked data on my daily commute to and from work. I garage park every night. I charge to 90% almost every night (unless I forgot to plug in). I leave the same time every morning (6:55) I took an almost identical route to and from work each day. You'll notice from the data that there were two slight changes on my distances driven... this was due to a local road closures for a couple of weeks. I park outside every day at work. I return home by 4:15 every day. Half of my drive I do about 71 on the highway, the rest is local roads.

On warm days, my climate is set to Auto at 73 degrees. I use the seat cooler sometimes. On cold days, I set the climate to Auto at 68 degrees, and I use the wheel warmer and seat warmer.

TLDR: Nearly identical route, consistent speeds, consistent charging conditions, consistent climate settings. I did not record data for days where my route varied for any significant reason (i.e. stopping at a store).

I should also note that I needed to find data that was quick and easy to collect. I decided not to install any apps to get battery data. Instead, I went with a few key data points: daily high temperature, daily low temperature, starting battery %age, ending battery %age, and distance driven. This way I can calculate my daily range if I had 100% charge. These data points were easy to jot down quickly when I'm trying to get out the door in the morning, but still give me enough information to learn how outside temperature effects my range.

When I get more cold weather data on days that stay down in the single digit temperatures, I'll finalize this data and make some graphs that tell interesting stories. For now, I'll share the data I've collected to date.

The better item to track would have been your m/kwh. This gives a more accurate picture of how the heat pump compares to the non heat pump models.

 

[davegram]

Thanks. Moving forward I'll throw in the m/kwh for good measure. It's easy enough to do.

 

[Tampamike]

Too long; didn't read.
Signals that someone is giving a summary of a long post.

Except that he didn’t summarize the findings, … which would mean, … I’d have to … read the report.

Maybe it should say”TLDR, nah, RTFR!”

 

[Mach-Lee]

Thanks. Moving forward I'll throw in the m/kwh for good measure. It's easy enough to do.

I second including the mi/kWh data, also average speed if that's feasible. The range meter is just not an accurate representation of efficiency. Percentage used can also vary due to changes in the battery temperature (battery capacity changes with temp).

For a comparison point, I'm currently seeing about 2.0 mi/kWh driving around average speed ~60 MPH in 0-20ºF temps. Heat usage is around 4 kW.

 

[raijinmach]

Your tl;dr didn't include what the difference in mileage actually is for those of us who don't want to mine the data lol

 

[davegram]

Ok, before I post the dataset:

1. I explained my methodology in the original post.

2. At the suggestion of @GreaseMonkey , some time in December I started collecting the m/kwh for each daily trip.

3. It is important to understand how I calculated Range. I did not use the GOM. I calculated my own range using the %battery expended during the trip and the mileage traveled.

4. I created three Scatterplots. One compares calculated range to daily high temperature, one compares calculated range to daily low temperature, and one compares calculated range to m/kwh. You will notice that I added a trendline to each scatterplot. This helps account for outliers.

5. Bottom line: My average range on the summer is 300+ miles. My average range in the depths of a very cold NY winter was roughly 220 miles.

 

[Jimrpa]

Ok, before I post the dataset:

1. I explained my methodology in the original post.

2. At the suggestion of @GreaseMonkey , some time in December I started collecting the m/kwh for each daily trip.

3. It is important to understand how I calculated Range. I did not use the GOM. I calculated my own range using the %battery expended during the trip and the mileage traveled.

4. I created three Scatterplots. One compares calculated range to daily high temperature, one compares calculated range to daily low temperature, and one compares calculated range to m/kwh. You will notice that I added a trendline to each scatterplot. This helps account for outliers.

5. Bottom line: My average range on the summer is 300+ miles. My average range in the depths of a very cold NY winter was roughly 220 miles.

Thanks! What would be interesting would be the same data collected from a pre-heat pump vehicle over the same period of time, in similar conditions.

 

[RickMachE]

Thanks! What would be interesting would be the same data collected from a pre-heat pump vehicle over the same period of time, in similar conditions.

Yup. I haven't seen a single side-by-side of either the Mach-E or the Lightning, pre and post heat pump.

 

[davegram]

Yup. I haven't seen a single side-by-side of either the Mach-E or the Lightning, pre and post heat pump.

Yeah, that's the holy grail. If we found someone living in the same region of the US who would commit to collecting the same data on a non-heat pump MME, we could compare definitively.

 

[davegram]

Ok, before I post the dataset:

1. I explained my methodology in the original post.

2. At the suggestion of @GreaseMonkey , some time in December I started collecting the m/kwh for each daily trip.

3. It is important to understand how I calculated Range. I did not use the GOM. I calculated my own range using the %battery expended during the trip and the mileage traveled.

4. I created three Scatterplots. One compares calculated range to daily high temperature, one compares calculated range to daily low temperature, and one compares calculated range to m/kwh. You will notice that I added a trendline to each scatterplot. This helps account for outliers.

5. Bottom line: My average range on the summer is 300+ miles. My average range in the depths of a very cold NY winter was roughly 220 miles.

Note that if you open the Excel file with all of the data, you'll find a monthly average calculated range.

Also, I noticed that there is a significant drop-off in range that occurs somewhere around 15 degrees. I want to look more closely and see if I can quantify that.

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