I guess you've read "for one year" as "in one year", but that's not what "for" means, and anyway, I'm sure it took a lot more than a year to install 100GW worth

I guess you've read "for one year" as "in one year", but that's not what "for" means, and anyway, I'm sure it took a lot more than a year to install 100GW worth of turbines.