324 mile range this weekend

Did your miles per kWh x battery size even come close?

RickMachE said:

Did your miles per kWh x battery size even come close?

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Sometimes, at one point it showed 3.7 miles\kWh which is 325. But it would fluctuate up and down depending. Ultimately the day I took this pic it was mostly highway and I wasn't that efficient. I think I ended at it being 3.2 miles\kWh or so that day.

Right. 88 x 3.2 = 282, not anywhere near 324.

The GOM isn't accurate. But, Ford is testing "intelligent range" and that may prove to be an improvement.

The GOM should adjust when you program a trip into the Navigation. Currently, it just uses your recent driving habits to calculate.

MachDrive said:

The GOM should adjust when you program a trip into the Navigation. Currently, it just uses your recent driving habits to calculate.

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I'm not sure it does. I drive a regular 193mi route to our lake house in the mountains and it always will overestimate our range by about 30-40 miles on the way up, and underestimate by about the same on the way back.

SWO said:

I'm not sure it does. I drive a regular 193mi route to our lake house in the mountains and it always will overestimate our range by about 30-40 miles on the way up, and underestimate by about the same on the way back.

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Look at range car has BEFORE you put trip into navigation. Then, after you start the drive, see if the total range number has changed.

Ford is testing an intelligent range functionality right now.

RickMachE said:

Look at range car has BEFORE you put trip into navigation. Then, after you start the drive, see if the total range number has changed.

Ford is testing an intelligent range functionality right now.

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I do. The GOM isn't correct until I've finished my ascent / descent.

Overall I'm not disappointed with the GOM, though it is generally pessimistic. I think a hybrid solution where it uses an estimate closer to what ABRP (which does use elevation gain and temp) projects for nav would be better.

SWO said:

I'm not sure it does. I drive a regular 193mi route to our lake house in the mountains and it always will overestimate our range by about 30-40 miles on the way up, and underestimate by about the same on the way back.

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I know the Mach-E GoM uses both temperature and recent driving habits. I believe an active nav also takes into account road speeds. I’ve been able to use the GoM for road-tripping fairly accurately, taking the battery down as far as 1% SoC.
As a side-note: Ford mentioned elevation adjustments are being added as well.
Sometimes, I find myself using the SoC as more of an indicator on roadtrips, rather than the GoM. i know I can get at about 3 miles per %, and use that as my rough estimate.

MachDrive said:

I know the Mach-E GoM uses both temperature and recent driving habits. I believe an active nav also takes into account road speeds. I’ve been able to use the GoM for road-tripping fairly accurately, taking the battery down as far as 1% SoC.
As a side-note: Ford mentioned elevation adjustments are being added as well.
Sometimes, I find myself using the SoC as more of an indicator on roadtrips, rather than the GoM. i know I can get at about 3 miles per %, and use that as my rough estimate.

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The GOM uses current temp and history. It doesn't take altitude change or future temp (when we drive into the mountains the temp can drop 40 degrees). When I start my drive up it predicts a range of about 285, arriving 193mi later with an estimated ~45miles left. When I return, the navigation will sometimes tell me I will need to stop and charge to make it back, even though I will arrive with well over 100mi of range when I arrive back home.

I had a Select AWD before our GT and it would do the same thing. The Nav would say we'd make it up with out stopping, which was impossible. On the way back, Nav would say we'd have to stop but we could make it all the way home if it wasn't winter.

SWO said:

The GOM uses current temp and history. It doesn't take altitude change or future temp (when we drive into the mountains the temp can drop 40 degrees). When I start my drive up it predicts a range of about 285, arriving 193mi later with an estimated ~45miles left. When I return, the navigation will sometimes tell me I will need to stop and charge to make it back, even though I will arrive with well over 100mi of range when I arrive back home.

I had a Select AWD before our GT and it would do the same thing. The Nav would say we'd make it up with out stopping, which was impossible. On the way back, Nav would say we'd have to stop but we could make it all the way home if it wasn't winter.

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Yes, it doesn’t do elevation yet, which includes temp variation. It only accounts for route speed on a trip at the moment. Ford did say they plan to add it. No matter what, its a ‘Guess-o-Meter’. It does its best, but we drivers must use common sense.

The biggest change-of-thought when moving from ICE to BEV is road-trip planning. In many parts of the country, the infrastructure is not at a point where we can just ‘get up and go’. This shouldn’t be a major consideration for the typical driver, just something to be aware of when buying an EV. Apps like ABRP are amazing tools to help navigate this.

SWO said:

I do. The GOM isn't correct until I've finished my ascent / descent.

Overall I'm not disappointed with the GOM, though it is generally pessimistic. I think a hybrid solution where it uses an estimate closer to what ABRP (which does use elevation gain and temp) projects for nav would be better.

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I didn't say correct.

Start the car. Look at the GOM and write down the number.
Now, put the route in the navigation, and drive say a mile, and see if the GOM has changed more than a mile. In other words, is it changing due to the route in the system (ignoring altitude), just the route distance.

Did your miles per kWh x battery size even come close?

I have had my GT since Nov 30, 2022 and the GOM has been showing ~ 250 mile range over winter (not that cold in TX). Now that warmer weather is here, it's nice to see the GOM showing about 285 miles. Yeah, it's an estimate but hopefully reasonably based on my recent driving. Most of my driving is short range, so the mi/KWh seems not to stabilize until you have driven > 20 miles or so. Thus, it's not easy to verify how good the GOM is unless I am driving further, but that tends to be highway speeds which will give me a lower range. I guess what I should do is note my odometer and battery percentage over a number of short trips and see how well it is matching the GOM. Has anyone recently (after the GOM software update) done a comparison to test accuracy?