Shadow

I don't know how reliable this source is but I can not find anything to disprove it.

http://www.renewablesinternational.net/german-power-exports-still-more-valuable-than-imports/150/537/79015/

It appears that Germany gets more for its exports to France than it pays for its imports. It makes sense as France's nuclear power plants are pretty inflexible, the idea being to run them flat chat all the time. This means that when demand is low France has to sell its excess for whatever it can get for it. On the other hand when demand is high, they will need to import power, which Germany may be able to provide and can then charge a premium for

Warmair,

There is nothing wrong with the figures, just the conclusion. The import/export of power due to supply/demand differences is eclipsed by the power purchased from one country and sold to another at a higher price to cover network costs pretty much like Transgrid and Ausgrid do in Aus. The costs from the generators is 3-4c/kWhr and sold to industrial/domestic consumers from between 6c and 35c. The balance is network costs.

Irrespective, the feed in costs for solar is about 135 euro /MWhr and is sold on at 25-50 euro, effectively subsidizing external customers. No wonder Germans are getting annoyed with the 70% increase in real power costs in the last decade.

As for stability just look at https://www.energy-charts.de/price.htm
and look at week 19 incl the intraday prices.