Well, in principle, we know how to build nuclear. We're slow at it, it's expensive, but it's sort of off-the-shelf.
Long term energy storage, by batter or otherwise..? I don't believe anyone has done it. We're not talking about maybe smoothing out energy supply/demand over 24h, were talking producing energy in the summer for the winter.
I'm saying there's no storage solution yet. Even combining all storage types, you'd still run out of materials (battery) or locations (hydro) before finishing.
It's not speed vs speed. It's speed vs forecasted capacity.
Long term energy storage, by batter or otherwise..? I don't believe anyone has done it. We're not talking about maybe smoothing out energy supply/demand over 24h, were talking producing energy in the summer for the winter.