Agree, lots of unknowns ahead. My response was simply to the comment above asking for citations whether it is even technically possible to run the grid at such

Agree, lots of unknowns ahead. My response was simply to the comment above asking for citations whether it is even technically possible to run the grid at such high penetration. Someone made the point that it's a rather daunting materials design challenge to make PV panels: They must withstand 30 years of water, heat, salt and UV light with no degradation, and then trivially separate into their constituent components at recycling time. We are definitely gearing up to create an enormous recycling headache 30 years from now.