What should I set my charge limit to?

I own the same car. I charge mine to 100% every time as its manual recommends.

I think it means charging to 100% *at least* once per week. Charging it to 100% every time shouldn’t be a problem for that chemistry.

There isn’t an automatic may, you have a charge limit and that’s it set. I change mine 3 times a week and too 100% as that’s the recommendation for a LFP battery.

Is there a con to setting it 100% alway? Will I hurt the LFP battery or not really?

If I had an L2 charger at home and did this, I'd never drive the car below 75%. What do you regularly drive the car down to?

Lfp battery is ok to charge to 100% every time

Me too same 2023

Yep charge it 100%. I have 5% battery degradation in 3 plus years

Btw I drive about 50% of the battery a day so I charge daily

It's not that it likes to be charged to 100%. The LFP controller needs a little help. You can charge it to 100 once a week or even less often to reset the computer. The range calculation is based on metering the kwh consumed and extrapolating the probable condition of the battery with the total kwh the battery holds when full, minus all the kwh spent since the last time it was full, plus all the kwh charged. The battery voltage is flat throughout its range except at full/ near-empty so it's not possible to figure out the battery state of charge in the middles. NMC voltage has a ramp from empty to full so it's easy to know by simple sample. This goes both ways, discharge and charge. Thus, if you charge only to "80" all the time, the calculation will be off farther and farther - what is 80 percent? How accurate is the metering? How much is left??? Hence, the 100 reset once a week - fail to do so and stranding is possible! A definite drawback to LFP. If you were to compare a LFP charged to 100 always and one with careful management, anal rituals, I would expect IMO a noticeable but small payoff. Myself I just play around with it, as it's kind of fun discharging down and charging it a bit back down back up etc. Play what ifs with range. I just keep in mind that the computer loses track, I imagine just a little, as I do these up and downs until I top it off.

2023 m3 rwd. I dont charge every day. My goal is to not charge until 20-30% then up to 80% most charges and like it says charge to 100% once a week. I don’t always do it once a week though. I aim to leave the car at 50% if I won’t be driving for a day or two. I have no proof this is a best practice. I’m not a fan of letting the battery sit at the same soc all the time. My understanding is the sitting unused is where most of the degradation happens. It seems the higher the mileage with low range loss is the cars that are driven hundreds of miles a day no matter what soc the charge to. My wifes long range 23Y isn’t driven as much and we run it up to 54 most charges after we have reached 30 or lower. Every week or two up to 80 then some weeks 90 or 70. I vary so it doesn’t spend a lot of its rest time at the same soc. Sometimes I’m going to take the car a do 100+ miles. I will charge to 90 then send it up to 100 and leave just after it’s done. It charges so much faster at 48 amps vs my 32. I thought it would only be about 35% quicker to charge but it feels so much faster than that. I need to time some charges and see how much faster it actually is.

I’m trying to dial in my charging routine too. I use about 20% of the battery per day, and I keep my charge limit at 100% with scheduled start/stop times. I only plug in when I’m down to around 20–30%. That way the car finishes charging to 100% about 1–2 hours before I leave for work. I’m assuming that shouldn’t cause much extra battery degradation?

Charge to 100 every day on that kind of battery

I did a bunch of google research on this, a year and a half ago (for my wife’s M3 LFP), and the there are many varying opinions- I settled on 40-80% every other week, and top it to 100% the other two weeks a month.  Recently checked, and the battery is at 99% (1% degradation 😉).  Good luck 👍

Hi OP, that is a great question. Early on in my Tesla journey, I bought a subscription to Tessie. In addition to the insights the app provides it also has powerful automations. The ability to change the charging percentages on certain days is one of the automations I set up and it works great.

I usually charge mine to 100% but that's cause I usually charge it only once a week so yeah.

I set it at 75% daily and charge it up to 100% when I remember so probably once a month lol

When you set it to 100 it asks if you want this to be a one time thing. When you want to charge to 100% just adjust the charge limit to 100% before you get out and then, if you reach 100% on the charge it will automatically revert to whatever you had before.

You’re supposed to charge the LFP to 100% every time. It’s recommended that at the minimum you charge it to a 100% once a week.

I have the same car and year. I drive it from 100% to 25% every day. I charge to 100% daily. Battery seems to use the same amount of battery since I purchased.

I literally was having this conversation with myself the last few days. I have a 2022 Model 3RWD. I realized that it takes me way too long to charge to 100 as I’ve been doing. Charging to 80% everyday is fine, depending on your daily commute. Most likely helps with longevity also.

You can keep the charge limit at lower percentages for much longer than a week. What will happen is that the BMS will start to loose track of the small voltage differences that you see in LFP chemistry so the car will estimate the range you have wrong (and by extension also the SOC). If you are only driving short distances, this should not be much of a problem but it is recommended to fully charge LFP batteries every once in a while to allow the BMS to recalibrate. The reason Tesla recommends charging to 100% every week is probably to avoid calls from people that get upset when the displayed SOC/range doesn’t match reality.

I have the same model. I leave it plugged in when not in use and charge to 100% every day at home. On road trips I charge to 96% except when I get to my destination where I charge to 100%.

I've seen research articles that dhow charging up to 70-80% leads to a much less steeper battery degradation than 50 to 100%.

How many miles is your car currently at and how is it holding up in terms of wear/tear?

I have a 2018 M3. I set for 80% unless I know I need a full battery.

67%

Do as the app says

Hmm. If I don't plug in every day I feel like I'll end up forgetting some day...

Set it to 100% and leave it there. From what I understand, LFP batteries have a flat voltage curve so the BMS gets confused over time as to the exact state of charge. By charging to 100% you are giving it a reference point to calibrate itself off of. A full charge doesn't hurt LFP batteries so there is no reason not to keep it at 100%

I have 69k miles with zero issues, never had an issue with my wipers either. Changed tires at 55k

Don't need Tessie for that. Shortcuts on iphone can do that as well

Not true. There are automations available on Tessie that are not available on the iPhone. I did my research

I was strictly referring to the ability to change the charging percentages on certain days which is definitely possible with shortcuts.

Got it. You are correct!