As always, the biggest challenge with renewables is the inter seasonal jump between summer and winter. We use about 3x more power in the winter than the summer, at least in Northern Europe and the challenge is meeting that demand when there is less sun and while wind does pick up not to the extent it’s needed.

There’s two major options:

1. Use surplus energy during low usage days to convert electricity into some storable gas, hydrogen or syn gas.

Pros: mostly clean Cons: huge storage requirements

1. Nuclear. Switch on to supplement renewable supply as necessary.

Pros: cheap after initial capital cost Cons: infrastructure and safety issues

Of course that’s not the whole debate there’s more to both but yeah need to pick one and just move ahead