You have to think about these things as a portfolio rather than just by minimum price.

If you have a steel mill for example you need to be able to basically guarantee a certain level of energy production to run it viably because the risk of there not being any power during adverse weather is enough to make it unviable (you can't just turn these things off). This is the reason why gas and nuclear probably aren't going away (or at least shouldn't).

If you need predictable price buy futures.

If they increase in price then firm production is stimulated to build to meet the gap.

https://www.next-kraftwerke.com/knowledge/futures-market