Here is more info.... I commute 102 miles, 51 each way. Coming off a Chevy Volt where I had to charge at each location for max benefit. BUT, given I can easily make it to home from work and back to work on one 50-60% use charge, was wondering if I should just charge at work for 4 hours and the battery getting used 80% down to 30% or charging up at every stop (Home and Work, only during work week). It takes me about 20% to get to work and 30% use to get home (hills). If topping the battery off daily at 80% is best, I'll do that. Right now it is set at 90% per what I read from Elon.
Based on what you are saying, if you want the free charging, you should consider yourself commuting from "work" round trip (charging at work to your set percentage, driving home, not charging, then driving back to work to plug back in) instead of the normal commuting from "home" round trip most people with home charging do.
Same thing (work - home - work) vs ( home - work - home), plugging in, in one of those spots, and charging to your set percentage. There really isnt a need to plug in both places unless you are not working that day (then plug in at home).
If I was in your shoes, with free work charging, I would charge at work every day and not plug in at home at all. Based on your commute, I would set the charge to 90% to make the most of that free electricity at work. At home, I would not plug in unless I wasnt going to work the next day, and I would not use sentry mode, or cabin overheat protection at home.
I would also ensure that the car went to sleep at home by ensuring I wasnt connecting it to any third party apps, or if I did do that, I would make VERY VERY sure that they were not keeping the car awake. The above will have your car sleeping at work when it finishes charging at 90% and at home when you get back at 60%, and its likely you would experience very little BMS drift (reporting of mileage) doing the above.
Of course, if thats not convenient, you can do whatever is convenient, but the above is what I would do if I was commuting like you (which I am very close to doing, btw... I just dont have free charging at work, so I commute "home - work - home" and plug in just like I am mentioning above. My work commute is about 80 miles a day, to your 100 miles a day, and I am commuting from temecula to north county SD. Those 80 real miles cost me between 80 "tesla" miles and 125-130 "tesla" miles depending on time of year, whether its raining, etc, for my model 3 P. I am practicing exactly what I am mentioning above, and a 90% charge on my car is now 267-268 miles, down from 279 miles when new, and my car has 24k miles on it after a year and half.
I am not driving into the office nearly as much right now, because covid, but I feel comfortable recommending the above to you as something to "keep it simple".