A Pretty Face
It's also phenomenally inefficient. The reason you have a grid - with large, centralised and flexible/controllable generation - is because of diversity of load. Local generation is fine to offset some of a homeowner's electricity bills (though the payoff is still in the 8-10 year range - e.g. $6k for a solar HW system versus $1.5k for electric or gas is a lot of fucking bills to make up the difference) but it also causes issues such as voltage rise for a grid that was only ever designed to be one way - generator-to-consumer, not consumer-to-grid.
As for the 30% of homes figure, I am assuming that is houses only. In the cities, most people live in apartments. Where exactly you put your solar panels if you live in a flat? And who pays for it if you rent? Renters won't spend $'000s on a solar set up, nor will landlords install them when it's the tenants who reap the benefits via cheaper power costs. Distributed solar generation really only benefits relatively wealthy homeowners who can afford houses in the inner city (it makes more sense in the country as many homes aren't connected to the grid or town gas in the first place).
Chiefly it seems to be for champagne inner city socialists with multi million $ homes who like to virtue signal with their solar/battery setups (all of which, as The Shooman notes is made in the good ole PRC), when they would be better off running their Priuses off the smell of their own farts.
Before fxh chimes in here - I actually have papers published on this topic. So I guess take my POV with a grain of salt.
Yes, there are lots of papers and numbers which blow all the green arguments out of the water; but facts don't matter, rhetoric and feelings matter. The news media love filling people's heads with delusions that the world is going to be phasing out coal and using solar and wind power instead, but it is not. The numbers don't add up. Do you know how many batteries are needed to store all that solar power to run an economy, and do you know how much that is going to cost? The numbers have been done, and fortunately it is the impossible dream. The globalists are promising dreams on technology that hasn't even been invented yet, and by the looks of it the trend is turning against this madness with Europe waking up and going back to coal.
Decimate the private business through high energy costs and then have the World Economic Forum and U.N run the show with China leading the way. Oh look, the WEF is already giving us some hints "Does capitalism need some Marxism to survive the Fourth Industrial Revolution?"
"You will own nothing, and you will be happy". You will rent from the global government.
All the globalists and socialists love the green revolution, and they love technology and artificial intelligence. Easier to watch over the people and give orders when everything is managing under a global system. The green movement will force everyone to comply. Eventually they'll have to force everyone out of houses and into apartments along railway lines because it will be more environmentally efficient. These globalists own the media and schools, so they can should be able to scam humans into doing anything, BUT they have a problem...the world still has a functioning democracy, and humans will fight back when their wallets start hurting and their power goes out - this is already starting to happen. The globalists pushing this green rubbish are toast.