Frustrated with Guessometer

[Vulnox]

For me because I don’t travel, but I feel bad for people that are traveling. Let’s say from Atlanta to New Orleans for instance, right now we have an Electrify America station here in GULFPORT that’s been down and it’s gonna be down for probably a total of about 4 to 5 months and vapor trails on the for here, there’s really nothing between Mobile and New Orleans. I mean level two charging is ridiculous. I mean you really have to go to a casino if you’re traveling West it’s kind of a crapshoot, if you don’t charge up around mobile, AL you’re gonna have some anxiety, unless you have the Tesla adapter, I left Tesla out they do have one in this area called D’Iberville, which is just before GULFPORT off I 10 but you’re gonna have to have an adapter.

Yeah there are definitely some less ideal locations, especially as you get to some states out west. I am in no way pushing that it's easier to drive an EV compared to an ICE in all areas. I was just saying you shouldn't be at risk of running out flat dead with NO options in 2024. L2 isn't ideal and is stupid slow when considering a road trip, but it beats having nothing.

Even then for most that prepare that shouldn't be a big concern. On the out of spec YouTube channel and other channels as well, they do road trips from east to west and north to south, and with extremely rare instances have never had a vehicle die on the way. On OOS they had an F-150 Lightning die on them twice because the truck went out at 3% one time, but that seems to be an issue with that specific truck and not the norm. Otherwise they do the trips without much concern, even when they do races and roll into chargers at 1-5% remaining charge because they pushed it as far as they could.

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[ajmartineau]

I’ve been getting clear errors in the GOM lately. It calculated my range at a rate of 1 mile per kWh. Each time a reboot of SYNC corrected the issue.

 

[Martin Volken]

The EPA rating of 310 miles is not a guarantee of the range you will get. What it is the result of a standardized test that every vehicle undergoes, whether it is powered by electricity or gasoline or diesel. It is meant to allow you to compare similar vehicles to eachother and see which one is more economical to operate. For EVs, this is generally expressed as miles per kWh, or kWh per 100 miles. The range rating is almost an afterthought In the results.

In other words, the estimated range you see in the guessometer is a reflection of how you have been driving in the past, and is constantly updated as you drive. The more you drive, the more accurate the guessometer will become.

 

[Martin Volken]

Yes. I understand that the GMeter is supposed to be a reflection of past driving and that is what baffles me. If my last trip before charging states 3.7 miles per kw and the average over 8000 miles is 3.5, then why would a full charge indicate 230 miles.

 

[RickMachE]

Yes. I understand that the GMeter is supposed to be a reflection of past driving and that is what baffles me. If my last trip before charging states 3.7 miles per kw and the average over 8000 miles is 3.5, then why would a full charge indicate 230 miles.

Did you put a destination in, or was this before using Nav?

 

[Mach1E]

Actually, both of my last cars had a GOM. Most modern cars with a computer on the dash will give you a range estimate. The difference is that the known range of the car is so much higher and the gas stations are plentiful. Range anxiety is not a factor in ICE cars. The GOM on our cars is there to help you not drive past your options.

For sure the range anxiety is different with a BEV (just look at how many GOM threads we have).

But the GOM and how it works really isn’t much different.

Just trying to relate to something familiar for the OP.

Probably the only difference between an ICE GOM and ours is that ours takes temperature into account (battery and external temps) as well as destination (navigation) to give a more accurate “prediction.”

But it’s still a guess and won’t line up with EPA, unless you drive like the EPA did in the test.

 

[Mach1E]

Yes. I understand that the GMeter is supposed to be a reflection of past driving and that is what baffles me. If my last trip before charging states 3.7 miles per kw and the average over 8000 miles is 3.5, then why would a full charge indicate 230 miles.

Because historical driving data is only part of the equation.

It also looks at temperature (battery and external temps), navigation destinations and other relevant data to make its “guess.”

Just wait until winter time and you really won’t like the guess on the dashboard (or you can search the dozens of winter range threads here to set expectations).

 

[Martin Volken]

Did you put a destination in, or was this before using Nav?

Before using nav

 

[Sikkun]

Actually, both of my last cars had a GOM. Most modern cars with a computer on the dash will give you a range estimate. The difference is that the known range of the car is so much higher and the gas stations are plentiful. Range anxiety is not a factor in ICE cars. The GOM on our cars is there to help you not drive past your options.

Hey some of us on occasion have driven 30-40+ miles after a fuel light comes on and have self inflected range anxiety.

 

[dtbaker61]

I am trying to understand the guessometer, but it makes no sense to me.
I own a 2023 Route 1 which is supposed to get a range of up to 310 miles.
I have never been able to get the Guessometer show more than 280 miles of range.

'up to 310 miles' is under EPA conditions

a GOM estimate of 280 max with full charge for your mountain pass driving is probably not a bad 'guess', but it will change over time based on your driving history, weather temps, elevation and speeds on your route.

If you 'reset' your history, and change your driving conditions, the GOM will adjust from default range estimate based on your new history.

.... try using 'this trip', and 'trip 1', or 'trip 2' resets to see your average over time or specific routes.

if you want more accurate info on kWhr remaining in your battery during a trip, you might want to consider getting an ODB2 reader, and the CarScanner phone app; you can display power output/regen, HV kWhr remaining, etc.

https://www.macheforum.com/site/threads/howto-use-obd-ii-and-carscanner-to-see-power-output-regen-charging-and-other-data.33211

 

[HuntingPudel]

I've never really cared about the EPA ratings and now that I have a car that has a range estimator, I completely ignore that part of the display. I fill up based on the fuel gauge/SoC display. Maybe I'm old. ?‍?

 

[Bruboy]

They keep changing how they calculate it. I wish they would leave it alone. I just get it figured out and they change it again

I imagine that as they get more input and information from usage that they will always mess with it. I am also assuming that it will improve/change as the MME is updated, hence part of the reason for updates.

 

[Thunderbuck]

...I recently drove across two mountain passes and back for a distance of 120 miles each leg...

Grades have a MASSIVE influence. If you're crossing a mountain pass, and you maintain highway speeds, you'll lose a TON of charge on the way up. You'll recover quite a bit coming back down, but you'll never get all of it (that pesky 2nd Law of Thermodynamics kicking back in).

For a trip I'm planning next spring I actually got a hold of the elevation profile of the road I'm traveling so I have a sense of where I run the risk of faster-than-normal discharge.

The "guess-o-meter" isn't actually that bad; it takes into account many, many factors, some environmental, some to do with the car, some related to your driving style and history.

 

[PilotMark]

It's not an EV problem.
I'm driving a rental this week. ICE only.
At the airport full tank and 290 miles to empty
OK don't know what to expect.
Drive for an hour and 20 minutes and I get 310 miles to empty.

I must be driving way better than the previous renter.

 

[kdonnel]

The GOM means nothing to me in my day to day driving.

On a normal day I never exceed the 85% range I charge to overnight. Doesn't matter if it is summer, fall, winter, or spring I don't normally drive 200+ miles a day. I drive my 30-100 miles in a day and plug in at night.

On trips I have either already decided were I will DCFC or am using Apple Maps to plan my route and stops so the GOM really is meaningless there as well.

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