I'm sure it depends on the country, but in my country (Spain) you can literally go and buy solar panels in the local hardware store and install them without permits, even for renters given you don't destroy anything. And besides that, most owners (as a renter) are OK with you installing solar panels.

Never owned a place, had solar panels installed in the last three places I lived in, the first two were apartments, currently renting a house. None of the owners had problems with us installing solar panels.

I don't personally own infrastructure to import LNG either. Grid-scale renewables don't require people to own property.

Got a balcony in your German apartment? Then you can use solar panels.

https://www.dw.com/en/boom-small-solar-devices-plugged-into-...

> Having a place you can legally install panels is for the upper class. Do you own a house?

Owning a house does not require belonging to the "upper class" in Europe.