EDF have been in debt for a very long time, they’ve been bought back by the state to restart a new plant generation. Disponibility has been worse and it was uncertain as the new maintenance issue was inspected everywhere. Now the global analysis is done and the maintenance has been aligned with the prediction for months, which calmed the market. Electricity price increase is multi-factorial: post COVID restart, war in Ukraine and new nuclear maintenance issue. It’s still under the effect of all of that and it will take a couple more years to come back to the previous situation, though still higher prices due to normal inflation and progressive carbon pricing.
If you’re worried about price variations, more renewable will make that worse. There are big variations of daily prices on the European market depending on wind in the North for example. Although thanks to the connected system, we can benefit from the right conditions from multiple parts of the continent.