Kind of pretty important and relevant:

The main reason why this process isn’t “something for nothing” is that it takes twice as much electrical energy to produce energy in the form of gasoline. As Aircela told The Autopian:

Aircela is targeting >50% end to end power efficiency. Since there is about 37kWh of energy in a gallon of gasoline we will require about 75kWh to make it. When we power our machines with standalone, off-grid, photovoltaic panels this will correspond to less than $1.50/gallon in energy cost.

So basically juat imagine a gas powered generator hooked up to this to power.

Ok, see how that’s silly?

Right, now, if you do run it off solar power, than sure! That makes more sense.

But the thing isn’t magic, it takes energy to convert air into basically a form of liquid energy.

And… you’d probably have to refine it or chemically treat it at least somewhat.

I’m not a chemist, but I am guessing this is the case, if you want gasoline that is just equivalent to what your car would expect.