  In this paper we analyze the current situation of wind and photovoltaic (PV ) power in-feed in the German electric power system and their effect on the spot market \approx20 .
<clarity>   In this paper we analyze the current situation of wind and photovoltaic (PV ) power in-feed in the German electric power system and their effect on the spot market \approx20 .
 In this paper we analyze the current situation of wind and photovoltaic (PV ) power in-feed on the spot market \approx20 .