The prices of energy did indeed raise through the roof. Crazy.
We do have a plan in which each hour the price of electricity does change. So we try to keep an eye on it, when we do put on which machine (if possible) and defenitely when charging the cars.
Currently the prices are extremely high due to a so called Dunkelflaute. That is when there is almost no sun and no wind. So no green energy is produced. For sure if you have a plan like we have, this comes in hard. Currently the price has doubled in a few days. It will go back again to the more normal prices when there is wind and sun. But that is not foreseen until the weekend.
It would be hard here to be completely of the grid. The winter are too dark! Maybe we will save for a battery. time will tell.
We have some pretty rough winters too, so I can see what you are saying about going completely off the grid. Our power company does offer plans like that where you can try to use more energy during off peak hours but since my wife and I both work, it would never even out for us.