> First, you can't predict solar or wind days ahead in the same way you can't predict rain, days ahead. There are "weather forecasts", not cloud reading. You

> First, you can't predict solar or wind days ahead in the same way you can't predict rain, days ahead. There are "weather forecasts", not cloud reading. You can. And there is companies specialized in that for the Wind and solar industry. [1] The reason is pretty simple: Weather variability tend to be high at the local level but pretty predictable at the national level (the energy grid level). And to answer to the original post, yes Nuclear energy can also be fine grained controlled to compensate the renewable energy intermittency. It is done every day in France. It can be done yes, Is it efficient ? Not really. [^1]: https://en.wikipedia.org/wiki/Wind_power_forecasting https://en.wikipedia.org/wiki/Wind_power_forecasting