Long-term Storage of LFP M3?

[RichAZ/CapeCod]

We have a MY and a Bolt. Turning the Bolt in to GM (hopefully) and am interested in replacing the car with a M3 SR+ with LFP battery. We have driven our MY back and forth from Cape Cod to southern AZ a couple of times (last trip was a week ago. 3,345 miles due to visiting friends in NC). Anyway, the M3 would sit in our garage in AZ for around five months at a time.

My question; anyone know what SOC a LFP battery is happiest at when stored? I understand they can tolerate 100% charging on a regular basis, but doubt that would be the best percent to leave a traction battery at when not driving the machine.

Thanks!

Rich

 

[Jeremy3292]

Good article: https://iopscience.iop.org/article/10.1149/2.0411609jes/pdf

TLDR: Store at room temperature and at 70% or below.

 

[RichAZ/CapeCod]

TLDR: Store at room temperature and at 70% or below.

Thanks Jeremy. My AZ garage will hit 110 on a few summer days, but I can dream!! Will leave the vehicle plugged in, so hopefully it will run the coolant to the battery.

Rich

 

[Jeremy3292]

Thanks Jeremy. My AZ garage will hit 110 on a few summer days, but I can dream!! Will leave the vehicle plugged in, so hopefully it will run the coolant to the battery.

Rich

Having a garage is definitely helpful and since you are able to have it plugged in, I would leave it at 50% (lowest Tesla will allow plugged in). Cabin overheat protection will help.

 

[Frank99]

You have to be careful with cabin overheat in the Phoenix area. If your garage gets to 110 and the a/c turns on, that will just add more heat into the garage, which will make the a/c run more, which will pump even more heat into garage.
If the car is out of the sun and in the garage, turn off cabin overheat protection.

 

[theothertom]

Hey Rich,
Are you going to use the LFP car in Cape Cod? Do some research on cold weather range loss for LFP before you make that decision.

 

[RichAZ/CapeCod]

Hey Rich,
Are you going to use the LFP car in Cape Cod? Do some research on cold weather range loss for LFP before you make that decision.

Not for the Cape. But I will drive it at least on one round trip back and forth from AZ to the Cape and return. Early Fall and late Spring, so no issues.

Rich