Before revision:  This paper shows that both effects overamplify the well-known merit-order effect of RES power in-feed beyond a level that can still be explained by the underlying physical realities .
After revision:  This paper shows that both effects overamplify the well-known merit-order effect of RES power in-feed beyond a level that can still be explained by the underlying physical realities , i.e., thermal power plants being willing to accept negative electricity prices to be able to stay online due to considerations of wear