The standard canle is only a few metres. What country are you in?
You'll need to extend the Non-Tesla end, it's a NEMA 14-50 plug (In the US) on the portable chargers if you have one, an ordinary 110v plug on the free emergency last resort, lots of time on your hands charger that they throw in with the car.
If you're electrically minded, you can make your own extension with plug, socket and cable from the local Home Depot, if not, you'll need to have an electrician make one up for you, same if you're thinking of putting in a new outlet.
The good news is that 15 meters won't affect the charging time.
Have a look around the site, there's much discussion on charging cables and adapters.
Congrats on the Sport!