This here is the new energy storage complex - a 20 000 cubic meters of water used as a heat storage for mainly averaging energy usage over day. The storage tank has been added by me. The building is most likely a part of the storage tank. 

However, currently I do not know how else this place should be mapped. Its a form of energy battery, namely heat currently. But besides usual mapping, a building and a storage tank, should this kind of new feature be more specified with details of what it actually is besides using description tag?