> For instance in Britain solar in winter has 1/10th of the output in summer, and we can have lulls in wind output for many days at a time. Grid expansion can

> For instance in Britain solar in winter has 1/10th of the output in summer, and we can have lulls in wind output for many days at a time. Grid expansion can average over regional lulls. Renewables also need to be built to provide significant overcapacity. Storage can help, but you can do it with only those two.