Plenty of semis and terraces have solar. Including the semis I can see out the window right now. In the UK Semi, Terrace and Detached is about 75% of household

Plenty of semis and terraces have solar. Including the semis I can see out the window right now. In the UK Semi, Terrace and Detached is about 75% of households and 80% of people. If you look only at owners it's about 90% of households (and even higher for population) And anyone who owns a home is rich. If you can afford 300k for a house you can afford 15k on reducing your electric bill. Now rental of course is a separate matter, and the real problem. As housing is so constrained landlords can extract all the money from tenants regardless of the quality, but even if it isn't, renters tend not to value things like solar or aircon. You can spend £10k adding solar to a house, but you probably aren't going to get enough from extra rent to offset the cost of installing it. In the US a property owner has to provide AC because renters will expect it, same as you have to provide a washing machine connection in a rented place. This is a mindset thing which can't be changed. In other European countries, but its not changing. Among owner-occupiers its France 80% houses, Germany and Austria 70%. However the rental issue is far more in those countries, where nearly half the country live in rental. Things like balcony solar work well there, and they can power a portable AC.