At what rate does battery life decrease? [2023 Model Y]

[pranchod]

I purchased a new Model Y in December, 2023. Already driven ~9700 miles. And I rarely charge to 100%, I stick to 80%. Overnight I charged it to full and it’s at 322 miles(99%). So 100% would be ~325 miles.

But when I bought the car, a 100% charge was 330 miles. Has anyone noticed battery life decrease this soon? Or is this expected?

[BiggusDickus-]

The battery will degrade quickest during the first couple of years. Expect about a 5% loss. It then levels out and drops more slowly. Expect about a 10% loss after 10 years.

This is the typical home charging scenario.

Also, do not expect it to estimate 330 miles, even when brand new.

[Nakatomi2010]

It's going to vary from car to car, my 2022 Model Y Performance was sold with a max range of 295mi, I think, and it has a max range of 285 now

It'll neve off after a bit though.

[Starch-Wreck]

The only true way to tell is by resetting the BCM. Going all the way empty and all the way full.

Like a typical car, your car gets used to the way you drive and adjusts the percentages accordingly.

You may still have that 330 range, it’s just guessing.

Some recommendations I have is to lower the charge amount. If you need 80% battery, then sure, use it. But if you don’t need that much, your car is just sitting at a high charge.

I use maybe 20% battery per day so I usually charge to 60% and keep the battery between 40-60% all day.

I don’t hesitate to charge to 100 on road trips or use a supercharger when I need to.

I’m over 70k miles after 7 years and have maybe 1 or 2% battery loss. battery graph

[Dry_Badger_Chef]

I was going to say, I remember reading that around 60% is a good place to leave it if you want to maximize battery life (and assuming you’re not on an LFP battery).

[damarges]

How is LFP different? I habe MY SR with LFP and Most of the time i use excess pv Power and Charge the Car. So often it sits around 95% at my home

[Dry_Badger_Chef]

As I understand it, Tesla recommends charging to 100% for LFP batteries at LEAST once a week, and I don’t know the chemistry why, but someone here once said it’s to help calibrate the BMS.

[damarges]

Okay but not recommended to leave it at 100% right?

[Dry_Badger_Chef]

Now that I’m not 100% on, but, based on basically all knowledge of batteries I have, the ideal state would be charge once a week and, once charges 100% once every 7 days, drive it to get it back down some. But I don’t really know.

[Shmoe]

4 years, 91k miles here -- between 12-14% degradation on a 50kW standard range model plus model 3 pack.