Yes, the grid votes into play. Especially for commercial solar installations. If I drop a 200Mw facility in a sunny area the grid needs updating to accept that

Yes, the grid votes into play. Especially for commercial solar installations. If I drop a 200Mw facility in a sunny area the grid needs updating to accept that 200Mw at that point. Bit that's "boring" infrastructure. Cables, trenches, transformers. It can be done in "months" (perhaps a couple years) not decades. For residential solar of course it's a non issue. The inverter caps the amount sent to the grid, and that cap is most often set to 0. (The 16% return I mentioned earlier is before feeding to the grid.)