[osacial]

My understanding is that owners of Tesla do not have to pay for electricity to charge cars. It might be similar to other companies, where their electricity used for charging is currently subsidized also by government.

That might change in future and sooner than we realize, especially when current trend is about self-sustainability. Switching all cars to run on electricity does not mean, that in future there will suddenly be more electricity(that will mainly be green), than we have now, so owners of current Teslas in future might be slapped with extra tax, because they are not self-charging. Future Teslas might have solar panels installed, but hardly that will be concern of Elon Musk, as his main income is not related to Tesla Inc, where he now owns only 18% shares and he earns more from space by ripping off NASA.

[dexterdog]

> My understanding is that owners of Tesla do not have to pay for electricity to charge cars.

Your understanding is incorrect.