Spanish utility Iberdrola has inaugurated its ‘Tâmega Gigabattery’ in northern Portugal, a renewable energy complex including pumped hydro with an energy storage capacity of 40GWh. Iberdrola has invested €1.5 billion (US$1.54 billion) in the facility which combines two run-of-river hydroelectric plants and an 880MW PHES unit (Gouvães), with a total combined hydroelectric power of 1,158MW....Continue Reading