[daddymalu]

I noticed some i5 owners are charging to 100%. Is that normal or should I stick to 80-90%?

[SkykingUSA]

I set my car to charge to 60% max, and I usually plug it in again when it gets down into the low forties. Works for me during a regular week.

I also changed the charge speed to 6A since that is also enough for a typical week. I only charge higher than 60% if I know I will have a long distance to go or expect I might need more range for something specific.

[RichardInCA]

I charge mine to 70 or 75% routinely. Charging to 100% can cause acceleration of battery degradation if you leave the vehicle with high state of charge for prolonged periods - for instance it’s fine to charge it to 100% and then take it on a road trip right after.

This is a really good overview if you want to go deeper on this stuff: https://g60.bimmerpost.com/forums/sh....php?t=2116211

[deutsch100]

Most of the time I leave my car parked with 25-60% SOC.

I 100% charge during the night 2-4x a month, but I do drive far the following morning. When I know I will not be driving for a few days, I do not charge.

I use Level II for my 100% charges, and in between I just top off with slow and gentle Level I

I have been doing this since 2017 with BMW, Jaguar, Tesla, Audi and Range Rover. Works great for me and no battery issues.

[agorski]

I don't have a daily commute so I keep it between 40-60%. As the other thread video explains, it's also good to dial down the L2 charging rate to whatever will get you to your target before you need it.

[AP]

You should read this
https://batteryuniversity.com/articl...ased-batteries

Technical document but it goes into the best way to prolong lithium batteries. What’s good for them and what is not good

So everything in a car requires some mechanical sympathy or in the case of EVs , chemistry sympathy!


Just because the car lets you charge it to 100% and leave it there and then run down to near zero doesn’t mean it’s necessarily good for it

Whilst this article is more towards phone batteries and such, car batteries whilst obviously more sophisticated are I believe subject to same issues .

You might argue if you are leasing for 3 years it doesn’t matter. The battery will be fine during that time and you don’t need to worry about it after that

[Roki_014]

mine is a lease so i charge it to 100% at least 5-6 times a week

[RichardInCA]

Originally Posted by Roki_014

mine is a lease so i charge it to 100% at least 5-6 times a week

Out of curiosity, why? Are you taking longer trips?

[Roki_014]

Originally Posted by RichardInCA

Out of curiosity, why? Are you taking longer trips?

yes and no , i just want to make sure i have the most miles, in case i have to go meet with my customers, i ve had the car for 4 months and already have over 7k miles, right now at 100% it shows my rage is 317 miles

[BMW5151]

Originally Posted by AP

You should read this
https://batteryuniversity.com/articl...ased-batteries

Technical document but it goes into the best way to prolong lithium batteries. What’s good for them and what is not good

So everything in a car requires some mechanical sympathy or in the case of EVs , chemistry sympathy!


Just because the car lets you charge it to 100% and leave it there and then run down to near zero doesn’t mean it’s necessarily good for it

Whilst this article is more towards phone batteries and such, car batteries whilst obviously more sophisticated are I believe subject to same issues .

You might argue if you are leasing for 3 years it doesn’t matter. The battery will be fine during that time and you don’t need to worry about it after that

I hope to lease a 550e (if I can get the proper options) and keep charged to 100%, so any battery degradation will be the problem for later owners. Since the condition of the batteries is an unknown, EVs depreciate much more rapidly than ICE vehicles. I get the info from our clients, as some of our clients are auto dealers.

[agorski]

Originally Posted by BMW5151

I hope to lease a 550e (if I can get the proper options) and keep charged to 100%, so any battery degradation will be the problem for later owners.

At the end of the lease, the dealer can plug into the OBD port and measure the health of the battery. Just sayin'.

[LVBMW]

Originally Posted by agorski

At the end of the lease, the dealer can plug into the OBD port and measure the health of the battery. Just sayin'.

Right now, however, there's nothing in the lease return guidelines that has anything to do with battery health. I doubt they could include such a thing as there are just so many variables.

[RichardInCA]

Originally Posted by LVBMW

Right now, however, there's nothing in the lease return guidelines that has anything to do with battery health. I doubt they could include such a thing as there are just so many variables.

I agree….but also think it’s a matter of time before this does factor in. It’s kinda crazy to me as it’s the most expensive part to replace compared to all the other things they might ding you on at the end of the lease. My guess is that since there’s no built-in way to assess battery health in iDrive, it might be hard to hold customers accountable to returning with a minimum % of original battery health.

[SkykingUSA]

Originally Posted by RichardInCA

I agree….but also think it’s a matter of time before this does factor in. It’s kinda crazy to me as it’s the most expensive part to replace compared to all the other things they might ding you on at the end of the lease. My guess is that since there’s no built-in way to assess battery health in iDrive, it might be hard to hold customers accountable to returning with a minimum % of original battery health.

Or battery health is not the customer's problem because the battery is under warranty for 8 years. They must expect degradation to be so insignificant after three years that they are not worried about it at all. I suspect the whole issue of battery health is a much smaller issue than we make it out to be. At least, that's what I'm hoping as someone who plans to be a longer-term owner of his car. :-)

[RichardInCA]

Originally Posted by SkykingUSA

Or battery health is not the customer's problem because the battery is under warranty for 8 years. They must expect degradation to be so insignificant after three years that they are not worried about it at all. I suspect the whole issue of battery health is a much smaller issue than we make it out to be. At least, that's what I'm hoping as someone who plans to be a longer-term owner of his car. :-)

I agree - we’re in this weird/early “gathering long term data” phase, but it’s probably instructive to look at the i4 and iX data assuming that we’re all using the same battery chemistry/tech (may be a bad assumption if the BMS is different).

[Blue Sky]

[QUOTE="Roki_014;31346744"]mine is a lease so i charge it to 100% at least 5-6 times a week

This is why EV resale inspection needs to be better understood and standardized.

[///M TOWN]

I charge to 90-95% on level l and have for 10 plus years on 5 different EV’s

Level ll to 80 and level l at 12a is easy on the battery even to 100% once a week

[ToddRGuy]

Originally Posted by daddymalu

I noticed some i5 owners are charging to 100%. Is that normal or should I stick to 80-90%?

I'd follow the recommendations of the people in the thread if you care about battery health in the long term. I read a recent thread where someone remarked that they didn't care about battery health, since it was a lease, and future problems could be dealt with by "the next guy". Deferred misery is not really my style of ownership.

There's an interesting podcast thread on here somewhere where they interview a Professor from UC Berkley on battery technology. It's a long podcast but very informative.

[Scrapula]

If I buy a used EV, I would check to see if it was registered at Recurrent Auto. I have my car registered (it’s free). Then when you go to sell it or trade it in, you will have a complete charging history. To me, this is like keeping all your records for oil changes and other maintenance. I always provided that when selling a car. I think most people would like a car that was charged less frequently and at lower levels. Might give you more resale value.

[ToddRGuy]

Originally Posted by Scrapula

If I buy a used EV, I would check to see if it was registered at Recurrent Auto. I have my car registered (it’s free). Then when you go to sell it or trade it in, you will have a complete charging history. To me, this is like keeping all your records for oil changes and other maintenance. I always provided that when selling a car. I think most people would like a car that was charged less frequently and at lower levels. Might give you more resale value.

That’s an amazing idea and feature! It might be the salvation of BEV resale value. Especially, when some people don’t give a toss about leased vehicles or how they treat them.

[SkykingUSA]

Originally Posted by Scrapula

If I buy a used EV, I would check to see if it was registered at Recurrent Auto. I have my car registered (it’s free). Then when you go to sell it or trade it in, you will have a complete charging history. To me, this is like keeping all your records for oil changes and other maintenance. I always provided that when selling a car. I think most people would like a car that was charged less frequently and at lower levels. Might give you more resale value.

Great input, thanks! I just signed up and added my car. Looking forward to when the reports start to populate.

[essgee]

MyBMW app also lets you export the charging session details by month. I tried it and it’s pretty easy and neat. Of course, if you want to save all the data, you will need to export it out every so often and delete it from the app as otherwise it will take up your phone storage.