I know some other has asked this question and it has been answered with, not needed, or more free energy nonsense.
But I do see sense on asking or proposing an alternator on the electric cars.
Electric car isn't anything new and there are a lot of options on how to convert your current 4 and 6 cylinders gas cars to electrics. Researches around the glove have develop electric motors that generate enough electricity to charge a battery and induct the motor at the same time. Yes you herd right, the technology for an electric motor to run with its own technology exist.
So why to we need supercharger centers?
How can an apartment owner charge his/her car?
What about a long trip where there isn't any tesla supercharging centers?
Traditional gas cars use alternators to run the car while driving and charge the battery at the same time?
What happens if you drain your battery completely? Will you be able to jump it and get it up an running until you get to a charging station?
I think is possible to add alternators to the tesla to have it running on alternators while the battery gets charged. Or use magnet motors to produce this electricity so you never has to stop and swap your battery or wait long hours to charge. This will also allow to jump your car and have it running on the alternators until you get home, or a charging center or keep running your car until your gets charged by itself.
A few theories of how or where to put your alternators.
Could be On the wheels. The rotor will turn the coils without consuming electricity but predicting it instead. Imaging 4 alternators,
It can also be attached with pulley to the main electric motor and will rotate at the same speed. One motor producing energy (alternator), the other motor inducting energy (engine).
If you think about it there are a lot of theories on how to add one or more alternators to EV, and I believe that if it isn't done at the factory, it will get done by aftermarket suppliers.
So you will be able to be energy free from gas, and tesla supercharged centers. I will see the future electric car that will run forever producing its own electricity.