The article reports that between June 2014 and autumn 2017, the Rellswerk, a small power station by illwerke vkw, was built and put into operation. Topics include considered that the Rellswerk is located in the Rellstal, a side valley of the Montafon in southern Vorarlberg/Austria and with the pump turbine water that is drawn in via the two streams Vilifau and Zaluanda is pumped into the Lünersee, which is around 550 m higher.