Battery Strategy

I always charge my battery to 50% as soon as I pull in the garage. Then I set it to be ready to go the next morning at whatever percentage I need. This strategy seems to have worked well. After 25k miles I still have a rated range around 320 miles. It takes about 2 minutes every evening to figure out where I am going the next day and how much battery I will need.

I have charged to 100% about 5-7 times per month, but it reaches 100% minutes before I leaven and I drive it down to between 10-50% immediately. So my car spends the overwhelming majority of its life at 50% battery.

I learned this strategy from someone on this forum. I would give credit if I could remember who it was from. But for me, it seems to work well.

My father in law also has a model y, 1 year older than mine. Also 25k miles. He keeps it charged at 80% all of the time. His rated range is down to 301. I don’t know much about batteries, but anecdotally the strategy I’m using seems to be significantly better than his strategy. But there may be other factors I am uninformed about.

 

[Kibana Dai]

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I always charge my battery to 50% as soon as I pull in the garage. Then I set it to be ready to go the next morning at whatever percentage I need. This strategy seems to have worked well. After 25k miles I still have a rated range around 320 miles. It takes about 2 minutes every evening to figure out where I am going the next day and how much battery I will need.

I have charged to 100% about 5-7 times per month, but it reaches 100% minutes before I leaven and I drive it down to between 10-50% immediately. So my car spends the overwhelming majority of its life at 50% battery.

I learned this strategy from someone on this forum. I would give credit if I could remember who it was from. But for me, it seems to work well.

My father in law also has a model y, 1 year older than mine. Also 25k miles. He keeps it charged at 80% all of the time. His rated range is down to 301. I don’t know much about batteries, but anecdotally the strategy I’m using seems to be significantly better than his strategy. But there may be other factors I am uninformed about.

Nice!! Could you please explain why blue curve starts to go up after ~9400 miles? Is that because you changed your charging strategy?

 

[Mensra]

Nice!! Could you please explain why blue curve starts to go up after ~9400 miles? Is that because you changed your charging strategy?

I suspect it was the battery management system recalibrating.

 

[ATPMSD]

Well you have certainly geeked out! Possible reasons for the difference in range:

• BMS calibration issues: for example, how far does your father-in-law drain down the battery before charging? If it is not very much the BMS calibration (range) is likely off.
• Environmental issues: are both cars kept in the same environment, such as a heated garage?

A good test would be to drive both cars down to single digits, then charge to 100% and see what the ranges are.

Have fun!