2020 MX long range plus @ 100% SOC = 295mi w/2020.8.1

[MXLRplus]

Car arrived 3/09/20 to Costa Mesa. Built in February, VIN is F260xxx. Listed as LR+. The dashboard and touch screen has always said Long Range Plus, and so does the Monroney sticker (351 mi range).
My first 100 miles I calculated that it was going to come out at 292 mi by driving and map miles. So today I let it charge to 100% from 58% at 7.7kW. And when it hit 100% it's at 295 miles. It doesn't seem to be able to report both % and miles, so it's hard to do seat-of-the-pants range estimates. I believe the 351 mi EPA number is in effect, it's just the car is acting like a "learning" range estimator, not a Tesla-style semi-fixed algorithm. The battery is rev F, all available updates have been loaded including 2020.8.1.

So, for those in the same situation, I feel for you. For the rest, endless threads about range are still mind numbing. I read about it, and did everything possible to insure I would receive a "351" car, and was reassured, but to no avail.

I have faith they will address this, but I wish I knew how much total capacity the car is able to use so I can do SOTP calcs for long distances. To paraphrase Ronald Reagan, "Use Instruments, But Verify" is the way I'm most comfortable with.

TLDR: It is normal for a brand new true LR+ to read range wrong right now. It's not the VIN or update. It's a bug.

 

[mswlogo]

Something is not right if it’s that low.

Both Model 3 and X were very close to EPA range on my very first charge (90% extrapolated to 100%) and shortly later to a 100%. Never had to learn much.

Nothing to do with driving efficiency.

Be curious where your “Rated” line is on the energy App on an LR+ with 2020.8.1 or later installed. Mine on LR sits at close to 300 wh/mi. Which does translate to approx 328 miles range.

Now that warm weather is back with only 50% Regen I’ve averaged 260 wh/mi for the last 25 miles driving around in town.

 

[MXLRplus]

Something is not right if it’s that low.

Both Model 3 and X were very close to EPA range on my very first charge (90% extrapolated to 100%) and shortly later to a 100%. Never had to learn much.

Nothing to do with driving efficiency.

Be curious where your “Rated” line is on the energy App on an LR+ with 2020.8.1 or later installed. Mine on LR sits at close to 300 wh/mi. Which does translate to approx 328 miles range.

Now that warm weather is back with only 50% Regen I’ve averaged 260 wh/mi for the last 25 miles driving around in town.

I drove 75-80 mph for much of my first 100 miles, so 295 mi isn't that bad, it reads 309 wh/mi since new.

I asked so many times, I sounded like a nag, and they assured me everything is normal for a LR+ when I picked it up Tuesday night.

 

[mswlogo]

I drove 75-80 mph for much of my first 100 miles, so 295 mi isn't that bad, it reads 309 wh/mi since new.

I asked so many times, I sounded like a nag, and they assured me everything is normal for a LR+ when I picked it up Tuesday night.

Efficiency has NOTHING to do with it.

Mine was a Performance and I did launches for first few days showing friends and family. Wh/mi was crap but it charged correctly. To within 1 mile of spec every time.

 

[Tonybvi]

My September 2019 build MX LR had an advertised range of 325 miles. At the delivery centre it had been charged to 90% and showed the mileage as 295 miles (= 328 at 100%), so not far off. I’m surprised yours is that low as it is no better than my 90% range when brand new and mine isn’t an LR+.

 

[MXLRplus]

New flash in progress: 2020.8.1.1

I had called Tesla, and asked them what I should do. They did have an answer. Next open service slot in 2 weeks, and my "7 Day Moneyback" ends Tuesday night.

Crossing fingers and toes.

 

[MXLRplus]

2020.8.1.1 finally fixed it. 95% = 336 mi so 353 mi.

Life is good again. Observation: Seems to have noticeably more punch at 95-100% SOC than 60-80%, full regen not available at 95%, which is why I don't like running EVs at 100% SOC unless they are buffered a lot.

If a moderator reads this, please add FIXED! to the title.

 

[VikH]

2020.8.1.1 finally fixed it. 95% = 336 mi so 353 mi.

Life is good again. Observation: Seems to have noticeably more punch at 95-100% SOC than 60-80%, full regen not available at 95%, which is why I don't like running EVs at 100% SOC unless they are buffered a lot.

If a moderator reads this, please add FIXED! to the title.

Good the hear that it is fixed.

Regarding power, you should get similar HP/TQ between 100-80% SOC. You shouldn't charge more than 90% on a regular basis.

 

[mswlogo]

2020.8.1.1 finally fixed it. 95% = 336 mi so 353 mi.

Life is good again. Observation: Seems to have noticeably more punch at 95-100% SOC than 60-80%, full regen not available at 95%, which is why I don't like running EVs at 100% SOC unless they are buffered a lot.

If a moderator reads this, please add FIXED! to the title.

Told ya, something wasn't right. Good to hear though.

 

[Reason]

Do we know where the 90% number comes from? I'm new to the game and also figuring out the amount for overnight charging.

Thanks in advance.

Good the hear that it is fixed.

Regarding power, you should get similar HP/TQ between 100-80% SOC. You shouldn't charge more than 90% on a regular basis.

 

[wreighven]

@Reason its been covered a lot here in this forum, and even by Elon himself. The app even has 90% set as the adult for daily charge point. I just keep my charge point set to 90% and forget about it unless I'm doing a longer trip. FWIW I get 317 miles at 90%...