Before revision:  Our combined analysis results show that, if the necessary regulatory adaptations are taken, i.e., significantly increasing the spot market's share of overall load demand and using  true marginal costs of RES units in the merit-order, energy-based power markets can remain functional despite very high RES power in-feed.
After revision:  Our combined analysis results show that, if the necessary regulatory adaptations are taken, i.e., significantly increasing the spot market's share of overall load demand and using true marginal costs of RES units in the merit-order, energy-based power markets can remain functional despite high RES power in-feed.