Nice to hear that they started operations now.
I found this bit interesting:
The Geretsried project will ultimately provide, in annual terms, 8.2 megawatts of electricity to the grid or about 64 megawatts of heating to the nearby town.
Emphasis mine... so I would guess they focus on electricity production during the summer months?
Such a close loop system has a bit of a low-grade waste heat problem during summer months though, even when using it to produce electricity. I guess we will see more heated public outdoor swimming pools again if this technology takes off.
Something is wrong with the link or website.
The idea as a PoC is not bad, but it would probably make more sense to use an open standard like GNU Taler for it and only do the data transmission over Meshtastic.