Extend range to 500 miles (or more) by making the existing battery pack scalable/upgradeable/swappable.
Moderator: The current pack is already scalable/upgradeable (85 to 100) and swappable. To make a far larger capacity battery today would require an entire vehicle redesign to handle double the batteries and double the pack weight. This would impact the structure, cabin space, suspension, brakes, tires, and steering and would come close to an entirely new vehicle design. The cost for a 500-mile battery replacement pack with today’s technology would also be quite expensive.
Update: A number of Tesla cars have been announced as of 2021 with more range. The estimated EPA range for these new cars: