Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.

2018 Model 3 LR RWD with only 64KWh battery?


Efficiency Obsessed Member
Oct 22, 2018
San Diego
I have a similar gripe with my P3D+. Not quite as bad as this but even starting off at 100% and pulling in at “1%” my max used hasn’t even touched 70kWh.

OTOH, It will go all the way up to “299mi” at full charge.

I think you have a 2020 P3D+.

Was that 100% to 1% in one continuous drive? If not, you could lose significant energy when the car sits.

You would expect to see (assuming you have 77.6kWh = 260Wh/rmi*299rmi; you may have more):

77.6kWh*0.955 = 74.1kWh (buffer is 4.5%, below 0%)
You use 0.99 of that:
The trip meter always shows a 1-2% loss:
0.98*73.4kWh = 71.9kWh

So the max I would expect you would see on the trip meter would be about 72-73kWh, for a brand new car. You saw less than 70kWh, which implies to me that the car must have spent some time sitting and losing energy. Could also be some error on the % used - rated miles would give better accuracy.

However, this method of tracking capacity is completely different from what the OP was observing. It is definitely well worth doing and capturing the data though - it is one of the only ways to capture degradation over time - you can always go back to your pictures and see how much energy you were able to pull out of your new battery, and compare.


Efficiency Obsessed Member
Oct 22, 2018
San Diego
My car manufacture date is in this range, but how does an owner actually know the issue is or is not effecting their car? Op's battery seems low but how do non-Tesla folks really know?

My recollection is that Tesla reached out to affected owners. Not sure if there are any people here who were affected who could chime in with their experience.


Devil’s Advocate
Dec 31, 2019
Hmm...could be interesting. I’ll have to do a “past zero” test some time to see if my BMS is still fuzzy.

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.