Scrutable

IvanV wrote: Mon Nov 17, 2025 4:22 pm Whilst this - the solar panel bit at least - sounds rather amazing, we should remember that only about 20% of the world's final energy consumption is supplied by electricity. But on the other hand, that doesn't imply we need 4 times more on top. Electricity can usually be used with about 2 to 3 times the efficiency of other energy sources, at least for common large fossil fuel powered applications like road vehicles and space heating. So replacing the rest - in terms of gross energy requirement - would only require about 1.5 to 2 times more.

Grumble wrote: Mon Nov 17, 2025 8:34 pm

IvanV wrote: Mon Nov 17, 2025 4:22 pm Whilst this - the solar panel bit at least - sounds rather amazing, we should remember that only about 20% of the world's final energy consumption is supplied by electricity. But on the other hand, that doesn't imply we need 4 times more on top. Electricity can usually be used with about 2 to 3 times the efficiency of other energy sources, at least for common large fossil fuel powered applications like road vehicles and space heating. So replacing the rest - in terms of gross energy requirement - would only require about 1.5 to 2 times more.

That 20% figure is wrong though, that’s not final energy usage. The figure Michael Liebreich uses is over 30% here: https://about.bnef.com/insights/clean-e ... et-part-i/ so we’re over 50% better off than you think