I'm curious if these systems form a net positive. The cost of a thing provides a pretty reasonable proxy as a summation of the energy put into it's creation. The implication being that a balcony solar system is probably roughly net-negative, environmentally speaking, until it reaches its ROI.

I wonder if enough of these systems reach return to cover all the ones that don't for some reason or another. Looks like ROI might be 3-7 years, at the high end seems probable people would maybe move and not be able to use them and never really get their money's worth out of it.

> at the high end seems probable people would maybe move and not be able to use them and never really get their money's worth out of it.

The whole point is that these plug-in like a hairdryer. Zero installation.

If you move, you take it with you.

If you move to a place they are not permitted, sell it before you leave.