Tesla's onboard navigation software should be able to help a lot with this challenge.
When leaving home, create a route to work. Scroll down in the navigation turn list, and you should see the estimated charge left at the end of a round trip.
Monitor this periodically, and if it drops below 15%, then slow down.
The navigation software will also help to identify a supercharger along the route, if needed for a quick recharge - likely on the return trip home. Since only a few miles should be needed to get back home with range to spare, the supercharger stop should be quick, 5-10 minutes.
However, the amount of time saved by driving faster will probably be less than the time required to re-route to a supercharger and charge - so driving slower, especially in winter conditions, could eliminate the need to charge.
Unfortunately, there is a trade-off between performance and range - and if the highest range options had been selected for the Model S, it's likely the drive could be done without any range anxiety.
In the current Owner's manual, there are Driving Tips to Maximize Range on page 78, plus a discussion of Factors Affecting Energy Consumption:
- Slow down driving and avoid frequent and rapid acceleration
- Consider using CHILL mode
- Use SPEED ASSIST or run under AutoPilot, to allow the software to manage acceleration and deceleration
- Try to avoid using the brake pedal for slowing, allowing REGEN to recapture as much energy as possible from braking
- Set Stopping Mode to HOLD, to get more REGEN benefits at low speeds
- Keep the tires at the recommended pressure
- Lighten load by not transporting unnecessary gear
- Drive with the windows up
- Limit use of heating, lights and air conditioning
- Before leaving home, while the vehicle is plugged in, precondition so you can use shore power to get the vehicle ready before leaving
- Enable RANGE MODE
- Disable features like Sentry Mode, Headlights after Exit, and Cabin Overheat Protection, which will use energy while the vehicle is parked
- Enable the ENERGY SAVINGS features in the Display settings
In general, having the vehicle above 90% or 10% regularly risks affecting battery life. Frequently using superchargers can also impact battery life.
As a long-time Tesla owner (since Jan 2013), would not recommend regularly charging above 90%. If the rated range is 320+ miles, you should be able to do a 225 mile round trip - worst case, slowing down can significantly extend range - slowing down from 80 to 65 MPH for 10-15 minutes could be enough to make the difference.
Our first Tesla was a performance model - and could accelerate faster than what you can use in normal driving on typical roads. When we purchased our 2017 S and 2018 X, we did not get the performance models, and instead took the standard models with the longest range - and even though have faster acceleration than you can use or need in daily driving...
But, if you got a performance model, and a long daily commute, following the recommendations in the Owners Manual, using as many of the energy savings settings as possible, and letting the onboard software help with range management - you should be able to do a 225 mile commute without having to stop for charging.