Sweden does have great mountains and hydropower, which makes integrating wind power easier. (Or even some solar too. It's bad in the winter but otherwise tends to anticorrelate with wind, which is good.) And nukes as well.

Also, the international spot power market actually started with Nordpool in the nordics, where it expanded to Europe. The countries in Europe buy and sell electricity all the time and it is a tremendous benefit. https://www.nordpoolgroup.com/en/maps/#/nordic