Using Global Solar Atlas we can calculate the economics of Dama Solar project. 1.3GWp solar plant should in Arad, Romania produce on average 1654850 MWh each year.
Project costs $636.3m (€561m)
https://finance.yahoo.com/energy/articles/rezolv-secures-636...
At the guaranteed price EUR 40.35 per MWh, the project should pay back in about 8.4 years.