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“Successful”: forcing other people to give you money for nothing.

Exactly. There's a reason the power company distribution lines operate at thousands of volts, and it's not because the power company has an affinity for zeros.

It's because it's the only way you can get a reasonable fraction of the power shoved in one end of the line to come out the other.

Anyone who's tried to use a couple hundred foot long extension cord or had to run wire to an outbuilding has experienced how quickly the voltage drop eats up any useful power when you're at double and even triple digit voltages.

I bet the "green" power, by the time it gets to even the nearest neighbor is such a trickle that it isn't even measurable compared to the line losses involved.

We have some property in a rural area. The site where we spend most of the time is shaded by a hill. I have another hill several hundred feet away with better solar exposure. But even to get that power across our property would require a significant investment in heavy copper, and that's after inverting it to 110vac first. Trying to push that at 12-18VDC? Forget it.