HV Battery: 80% to 20% battery limit. Myth?

[SpeedRacer72]

I wanted to post my experience with my HV Battery. As you can see from the pic below, I use the full range of the battery. My MME is a 2021 Standard Range. I purchased in Sept. 2021
It has been almost 3 years and I have basically charged starting at 0-10% up to 100% every day for 3 years.
Most of my charges are done using level 2, but I have a moderate amount of DCFC sessions.
While I don't have an ODBC to check battery SOH, I have done something else.
I use waypoints on my drive home. There are 2 exits on the freeway that I always check my batt % when I pass them. Since Sept. 2021 the numbers have not changed.
The below numbers are depending on speed i.e. if there isn't much traffic I can drive 80-85MPH and it uses an extra 1 or 2%, but if I drive slower it will use 1-2% less
At the first waypoint my SOC is at 90% +or-2,
when I get to the 2nd waypoint, my SOC is at 75% +or-2
and when I get home my SOC is at 60% +or-2
I have had the same results now for 3 years. The winter is a different story, these are summer #'s
Some people have asked if it is linear, i.e. if I start out at a different %. And it is very linear, a couple times a year if I have to leave early my charge might only be 70-80% and the numbers are still the same i.e. 10% used at the first exit, 25% used at the 2nd exit and 40% used when I get home.

Going to work in the morning I use about 50% because there is less traffic and I can drive 80-85MPH almost the entire trip.
I see all these people that say keep your SOC between 80-20, but my experience so far has shown no issue with using the absolute full range of the battery.
I have probably charged to 100% 780 times in 3 years
Of course, the car does not sit at 100% very long and I plug in right when I get to work so it doesn't sit below 20% very long
You can also see I have over 118,000 miles on the car.

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[Bjbena]

Just imagine if you had tire pressures set to correct values.

 

[bshaw]

How many tires have you gone thru in 118k miles?

I got my car before you, but you have almost 100k more miles recorded. Amazing.

 

[SpeedRacer72]

Just imagine if you had tire pressures set to correct values.

I know, I need to bump that up.

 

[SpeedRacer72]

How many tires have you gone thru in 118k miles?

I got my car before you, but you have almost 100k more miles recorded. Amazing.

I am on my 3rd set. I get about 50k miles out of a set of tires
Most of my driving is freeway miles

 

[bshaw]

I am on my 3rd set. I get about 50k miles out of a set of tires
Most of my driving is freeway miles

That is really good for tires. I am in the ~25k range on the original tires and they are more than 1/2 gone. Will maybe replace them before this winter.

 

[Bjbena]

I know, I need to bump that up.

I usually do about a pound or two above recommended. It helps a bit with range, though ride suffered a little.

 

[Mach-Lee]

I wanted to post my experience with my HV Battery. As you can see from the pic below, I use the full range of the battery. My MME is a 2021 Standard Range. I purchased in Sept. 2021
It has been almost 3 years and I have basically charged starting at 0-10% up to 100% every day for 3 years.
Most of my charges are done using level 2, but I have a moderate amount of DCFC sessions.
While I don't have an ODBC to check battery SOH, I have done something else.
I use waypoints on my drive home. There are 2 exits on the freeway that I always check my batt % when I pass them. Since Sept. 2021 the numbers have not changed.
The below numbers are depending on speed i.e. if there isn't much traffic I can drive 80-85MPH and it uses an extra 1 or 2%, but if I drive slower it will use 1-2% less
At the first waypoint my SOC is at 90% +or-2,
when I get to the 2nd waypoint, my SOC is at 75% +or-2
and when I get home my SOC is at 60% +or-2
I have had the same results now for 3 years. The winter is a different story, these are summer #'s
Some people have asked if it is linear, i.e. if I start out at a different %. And it is very linear, a couple times a year if I have to leave early my charge might only be 70-80% and the numbers are still the same i.e. 10% used at the first exit, 25% used at the 2nd exit and 40% used when I get home.

Going to work in the morning I use about 50% because there is less traffic and I can drive 80-85MPH almost the entire trip.
I see all these people that say keep your SOC between 80-20, but my experience so far has shown no issue with using the absolute full range of the battery.
I have probably charged to 100% 780 times in 3 years
Of course, the car does not sit at 100% very long and I plug in right when I get to work so it doesn't sit below 20% very long
You can also see I have over 118,000 miles on the car.

What’s your battery state of health (SoH)?

 

[SpeedRacer72]

What’s your battery state of health (SoH)?

I don't know. I don't have an OBD reader

 

[voxel]

I see all these people that say keep your SOC between 80-20, but my experience so far has shown no issue with using the absolute full range of the battery.
I have probably charged to 100% 780 times in 3 years

Data has shown calendar aging is more detrimental than SoC.

https://teslamotorsclub.com/tmc/threads/some-new-data-from-research-on-tesla-model-3-cells.311793/

Storage charge (aka 30-40% SoC) seems to be best but like life... you can't escape aging. Batteries eventually die.

 

[Teslaeata]

I usually do about a pound or two above recommended. It helps a bit with range, though ride suffered a little.

Running mine at 37psi fronts & 49 in rears all the time as I’m fully loaded almost all the time, don’t really feel the ride is harsh.

 

[GreaseMonkey]

Just imagine if you had tire pressures set to correct values.

What matters is consistency. But funny, nonetheless.

 

[George Knighton]

I wanted to post my experience with my HV Battery. As you can see from the pic below, I use the full range of the battery. My MME is a 2021 Standard Range. I purchased in Sept. 2021
It has been almost 3 years and I have basically charged starting at 0-10% up to 100% every day for 3 years.
Most of my charges are done using level 2, but I have a moderate amount of DCFC sessions.
While I don't have an ODBC to check battery SOH, I have done something else.
I use waypoints on my drive home. There are 2 exits on the freeway that I always check my batt % when I pass them. Since Sept. 2021 the numbers have not changed.
The below numbers are depending on speed i.e. if there isn't much traffic I can drive 80-85MPH and it uses an extra 1 or 2%, but if I drive slower it will use 1-2% less
At the first waypoint my SOC is at 90% +or-2,
when I get to the 2nd waypoint, my SOC is at 75% +or-2
and when I get home my SOC is at 60% +or-2
I have had the same results now for 3 years. The winter is a different story, these are summer #'s
Some people have asked if it is linear, i.e. if I start out at a different %. And it is very linear, a couple times a year if I have to leave early my charge might only be 70-80% and the numbers are still the same i.e. 10% used at the first exit, 25% used at the 2nd exit and 40% used when I get home.

Going to work in the morning I use about 50% because there is less traffic and I can drive 80-85MPH almost the entire trip.
I see all these people that say keep your SOC between 80-20, but my experience so far has shown no issue with using the absolute full range of the battery.
I have probably charged to 100% 780 times in 3 years
Of course, the car does not sit at 100% very long and I plug in right when I get to work so it doesn't sit below 20% very long
You can also see I have over 118,000 miles on the car.

Thank you for taking the time to post all this. It is helpful.

 

[dtbaker61]

I wanted to post my experience with my HV Battery. As you can see from the pic below, I use the full range of the battery. My MME is a 2021 Standard Range. I purchased in Sept. 2021

It has been almost 3 years and I have basically charged starting at 0-10% up to 100% every day for 3 years.
Most of my charges are done using level 2, but I have a moderate amount of DCFC sessions.

While I don't have an ODBC to check battery SOH, I have done something else.

I see all these people that say keep your SOC between 80-20, but my experience so far has shown no issue with using the absolute full range of the battery.

I have probably charged to 100% 780 times in 3 years
Of course, the car does not sit at 100% very long and I plug in right when I get to work so it doesn't sit below 20% very long
You can also see I have over 118,000 miles on the car.

While your statistics are interesting, I would say that your conclusion is 'unsupported' because you have not recorded the actual SOH number available via ODB2.

The other aspect of your data is that your use pattern doesn't really speak for or against the upper limit since you don't store your vehicle at 100%, you drive it the next day.

Your repeat drive to <20% SOC is the interesting part of your test.... and I would LOVE to see what your SOH actually is. I'd suggest getting a $25 ODB2, installing the CarScanner app, and take a look and report to this thread!

I'd love to see how the repeat <20% DOD has or has not affected the measured SOH as you have blown thru the 100,000 mile mark!

 

[dtbaker61]

I don't know. I don't have an OBD reader

get one!

not expensive, and pretty fun in combination with CarScanner custom dashboard.

https://www.macheforum.com/site/thr...r-output-regen-charging-and-other-data.33211/

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