Turkish renewable energy firm Margun Enerji Uretim Sanayi & Ticaret AS (IST:MAGE) has agreed to buy 100% of Hez Enerji Insaat San ve Tic AS, the owner and operator of a 24-MW geothermal power plant in Germencik, Aydin province, in a deal valued at USD 105.5 million (EUR 90.1m).