Potentia Energy, a joint venture between Italy’s Enel Green Power and its Japanese oil group Inpex Corp (<a href="http://www2.jpx.co.jp/tseHpFront/JJK020010Action.do;jsessionid=00BCDA79CB46082DE7A8E5D7B455B59D2" target="_blank">TYO:1605</a>), has agreed to buy a controlling stake in an over 1-GW portfolio of renewable energy assets in Australia under its broader expansion plans in the country.