First trip, aim to recharge at 20%. Safe for the battery, low anxiety. As you learn your car’s burn rate and Supercharger locations, you can drop the battery charge level at arrival.
Time is money. You may decide that faster cruise speed, with higher burn rate, gives you more earn time at the destination. As mentioned, plugging into Supercharger during fluid exchange-rest room and coffee-will add meaningful range with minimal time loss.
We live outside Philadelphia. In February I had a full-day meeting in far North Jersey. Figured I would stop at a Supercharger on the way home. Instead, discovered I needed a rest stop before I reached the meeting site. Found a Supercharger in a plaza with a coffee shop that was right off the highway. Plugged in, executed fluid exchange, unplugged. Added enough range to eliminate anxiety on the trip home.
FWIW - Chill Mode with Autopilot enabled gives me best efficiency. Tires at 48 psi cold helps range, gives absolutely even treadwear, even with episodes of spirited driving.
Try AbetterRoutePlanner site. It handles multiple stops and suggests charging strategy . Once you’ve entered your car’s characteristics, it is very accurate.
Depending on sales call duration, there may be an L2 charger at the site that can add some power while you earn work. PlugShare site can show you what’s available nearby.
Our local hospital, with medical office building, has a CHADeMO charger in the garage. You may be able to justify the $450 CHAdeMO adapter depending on number of those chargers, your schedule and the charging pattern that balances range anxiety and time efficiency.
FWIW - over 45K miles in 3 years on our Model S. I schedule charging to hit 100% as I’m ready to pull out of the driveway on a road trip. I have arrived home with 6% charge. Then I plug it in to recharge after a short cool-down period. 3% range loss after almost 3 years.
Our approach balances, “The car works for us, we don’t work for the car!” and, “Treat your tools well, and they will give long, reliable and effective service!” Don’t be afraid to push the car near its limits, do care for it.