As the other commenter wrote: trading, transfers, etc. is normal in the EU grid. You buy cheap, you sell expensive. Just because Germany imports electricity, doesn't mean it has to. The German grid, even in its unfinished state, allows turning off power generation where it doesn't make sense financially, and they can do that fast because they don't have those slow nuclear power generators clogging up the grid.
We'll see what comes of it when the year is finished and official sources release their information. Until then, you can translate this page here from the Federal Network Agency: https://www.smard.de/page/home/topic-article/444/213848
In the last paragraphs they write on in/exports and that they've bought cheap from France and Belgium in the last quarter. Why shouldn't they? France needs to have their reactors running. They are a constant deficit on the French taxpayer. Therefore, it is cheap on the EEX.
Nope. Albeit being shock-full of nuclear reactors... France always maintains fossil fuel active in order to load-follow. Add 'peakers' (needed during peak-demand) and here is the result: https://ourworldindata.org/explorers/energy?Metric=Share+of+...
Details: there are safety-related limits (power modulation proportion, duration of a pause needed after each modulation, modulations frequency...) to nuclear load-following capacity, and the very combustible status is a major parameter.
Pertinent document (French ahead!): https://www.sfen.org/rgn/expertise-nucleaire-francaise-suivi...
« un réacteur peut varier de 100 % à 20 % de puissance en une demi-heure, et remonter aussi vite après un palier d’au moins deux heures, et ce deux fois par jour »
Proposed translation: "a reactor power output can vary from 100% to 20% in 30 minutes, then after 2 hours can go back to 100% at the same speed, and can cycle this way 2 times per day".
This is quite a good performance when it comes to load-following (French engineers are very good at this), however it is insufficient in the real world (save any ridiculously expensive over-provision of nuclear reactor, most idling) and very weak compared to gas turbines performances.
> Edf indeed needs to sell as much as they can
No. EDF always needed to sell as much as they can, even before AREHN, because maintaining a high load factor for their nuclear reactors is financially key. An idle industrial reactor is a financial disaster.