Plattensee

Lake Balaton is a small reservoir in which the water of the dwarf brook is dammed up. The lake is used as the upper reservoir of a hydroelectric power station further down in the valley.

Lake Balaton is part of an old hydroelectric power station system

It is a reservoir for electricity generation, bio electricity

Small reservoir. Idyllic location. Also accessible by car.

Yes, extremely Bio.bzw. sustainable .. but also the genesis is extremely exciting: the Gutacher company Gütermann, which already in the first half 20.Jahrhunderts manufactured yarns industrially (weaving, spinning, dyeing, I hang a link below ..), has both the Lake in a hollow, as well as the power plant, which can be seen well from the road, built.
 A manager had the idea to use from the height of the Kandel foothills at St. Peter, height difference about 500m, hydropower with enormous pressure, and thus to generate the electricity needed for production. So at the height of Lake Balaton was simply created by congestion, and high pressure resistant steel pipes down to the Simonswälder valley (near bus stop Obersimonswald-Engel) relocated. There was a hydroelectric plant built, (Looks a bit like a Roman villa (link: de.wikipedia.org/wiki/Zweribachwerk#/media/File:Zweribachwerk_(1).jpg) that was also pumping power plant, say At night and on weekends, the lake was to be replenished with pumping power, electricity was produced during the day, but the amount of water in the inlet area of ​​Lake Balaton was far too low, pumping was not necessary at all and, as far as I know, never really performed An amount of electricity sufficient to supply several hundred households, and since there is no pumping, additional electricity is saved, so BioBio ...
Who wants to know more:
To the power plant: de.wikipedia.org/wiki/Zweribachwerk
To the company Gütermann: de.wikipedia.org/wiki/Gütermann
The reading is worthwhile !! And a tour over the Zweribachfälle is anyway the highlight in the Simonswälder valley.

Artificial to generate electricity for Gütermann (yarns) storage lake.

Storage lake for energy production for Gütermann Garnwerke

Near the lake is the restaurant Plattenhof, where you can stop for a bite to eat.