Since LFP batteries are more stable, they can be charged to 100% for daily driving. In fact, Tesla suggests charging your LFP Model 3 to 100%
at least once a week to balance voltage and recalibrate range and charge readings. Jun 15, 2023
Not saying I agree, just following protocol.
When Tesla started deliveries of the Model 3 RWD with lithium ferrophosphate (LFP) batteries, it made a strange recommendation on its website and in the user manual. Unlike the usual charging behavior for Li-Ion batteries, Tesla said it’s OK to charge the battery to 100% and even
recommends doing so as often as possible. 100% is what the owner’s manual says. But what does Tesla know, they only built the thing?
I would agree though that full charges a couple of times a week are probably best for maintaining range accuracy and not necessarily best for longevity. Whether you are charging to 50% or 90% really doesn't make any difference, because the LFP batteries operate at a relatively consistent voltage (3.2 v) across the charging spectrum. Probably charge to 80 or 90% for daily drives, and 100% weekly, or twice a week to maintain the accuracy of the range estimate. It's a balance. You are no doubt going to deplete the life of the battery over the time you own it and it is nice to know that the LFPs have a longer longevity than other batteries produced for and by Tesla.