He's got a point though [1]. The price of solar has gone down massively as well. We can use it to charge batteries. Farmers here are renting solar cells on their territory, getting free energy and selling the overabundant for money. If we invest in green companies who use solar energy, we end up stimulating that industry instead of giving the grey energy providers our dime.

Tesla's at the upper end of the market, but just today I saw on HN an article that GM is selling an EV in China for ~5k USD. In the mid-90s it was GM who, after an experiment, neglected the idea of an EV. See e.g. the documentary Who Killed The Electric Car? [2]

[1] https://en.wikipedia.org/wiki/Solar_energy#Potential

[2] https://en.wikipedia.org/wiki/Who_Killed_the_Electric_Car%3F