It is though, unless we had a major breakthrough in the last decade i'm not aware of, you can't just "plug in" 1 TW/h of solar pannels on a power grid when you

It is though, unless we had a major breakthrough in the last decade i'm not aware of, you can't just "plug in" 1 TW/h of solar pannels on a power grid when you need to. You can however start a generator, an eoliene, a turbine. PV don't offer that, although other kind of solar can.