> Nuclear plants can load follow at about 5% of their rated capacity per minute. This is glacial in the world of electricity.

which is why batteries are really great. We have couple of batteries that are 180 and 300gwh, which can turn on frighteningly quick. The iberian market is really young at the moment for batteries, they have a way to go before batteries make a dent in prices (which is great for us)

The spanish grid has about 16% nuclear: https://www.ree.es/en/datos/todate Now spain's grid usually has a whole bunch of solar sites in curtailment, which means they can turn on power fairly quickly. Which is where batteries come in, as the curtailment could be flowing into batteries, and that sweet sweet energy sold at a stonking profit in the evening.

But!

Denmark isn't the spanish grid. They have less predictability, so need bigger storage to account for the variability of wind.