Your car loses 1-3% battery per day just sitting there. Third-party apps and sentry mode are the biggest culprits.
Sentry mode alone uses 1-2% per day (~250W continuous). Third-party apps that poll the car prevent it from sleeping. Disable sentry at home, limit app polling frequency (TeslaFi, Tessie have sleep settings), and keep cabin overheat protection on "no AC" mode. Over a month, this saves 30-50 miles of range.
How many of these have you done?
Take the EV Quiz