First of all, whether or not they have an inflated view of their environmental impact a few hundred Tesla owners are meaningless and extremely trivial given that the output of the dangerous fossil fuel waste carbon dioxide has routinely reached over 30 billion tons a year.
How many stupid Tesla cars have been sold exactly?
I would not be surprised to learn that the carbon dioxide output of self-congratulating bourgeois Tesla owners praising themselves and one another on the internet easily outweighs and carbon dioxide saved by the stupid cars.
The "straight from the horse's mouth" stuff you post here rather supports than invalidates my claim that the car is for billionaires and millionaires. Your link shows that the overwhelming majority of self reporting Tesla owners make more than $100,000/year, and the majority, 74.24%, make over $140,000 per year.
If these people are not millionaires, members of the 1%, it is only because they have spent profligately, I would suspect spending their money in ways that help them avoid reality and keep lying to themselves.
To say that 32% of EV owners use solar power, is not to say that their stupid cars are really "solar powered." The capacity utilization of solar panels on this planet is typically on the order of less than 20%, in winter in most climates, less than 5%. The liars in the solar industry, a toxic industry, sell their wares by quoting peak power rather than average continuous power. Thus a "5000 Watt" solar installation might only produce less than 1000W of average continuous power.
A gallon of gasoline contains 1.3 X 108 Joules of energy. This means to provide the energy equivalent of a gallon of gasoline a fairly large home solar installation on a stupid McMansion would need to operate for 130,000 seconds or 36 hours to produce the energy equivalent of a single gallon of energy. Moreover there are the thermodynamic penalties of several energy conversions, electricity to chemical energy, chemical energy back to electrical energy, and electrical energy to mechanical energy involved, all of which have rather large efficiency problems owing to the 2nd law of thermodynamics, a law that cannot be repealed by idiots in Congress, either on the left or the right.
There are probably a billion better ways that that subsidy dedicated to stupid Tesla car owners could have been spent. Decent nutrition for school children who lack it is one way, providing clean water to the citizens of Flint, MI another...
The fact is that in this country, regrettably, most of the electricity is produced by burning dangerous fossil fuels, mostly coal and gas, but also some petroleum products. When this is done, the thermodynamic 2nd law penalty is even worse for idiotic electric cars.
There are places on this planet where electric cars are actually worse than gasoline cars in the number of people that die from car related air pollution: Electric Vehicles in China: Emissions and Health Impacts (Environ. Sci. Technol., 2012, 46 (4), pp 2018–2024)
Fuck that idiot billionaire Elon Musk. He is doing anything useful in this on going climate disaster - 2015 was the worst year ever observed for increases in carbon dioxide. He's merely distracting attention from it by giving equally clueless people an undeserved reason to pat themselves on the back. He's a clueless as a person declaring themselves to be "environmentalists" because every year they drive to the mall at Christmas to buy a Sierra Club Calendar.
I can't stand it when bourgeois people who lie to themselves assume that everyone on the planet is as clueless as they are. It would be nice if one or two of them took the time to open a science book and try to understand the contents.
Have a great weekend.
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Please. I want one so bad. 
