Comment by Zeebrommer
2 days ago
Mostly yes, but it works the other direction as well: a fossil power station may not want to completely shut down because it expects more demand later in the day, and offer a few hours of low cost electricity to stay in the merit order.
A lot of fossil power stations cant shut down for a few hours, they have to keep themselves on.
Coal mostly. This is why coal is largely being phased out for natural gas which can cycle on and off as needed.