Hrvatski Telekom d.d. and Liburana d.o.o., which is 100% owned by Professio Energia d.d., on 25 May 2023 concluded a virtual corporate contract for the supply of electricity from renewable sources (Virtual Power Purchase Agreement - vPPA). The electricity from renewable energy, in volumes of 50 GWh per year, will be produced by wind powerplant that will be built at the Mazin Gračac location.