Electricity of Vietnam (EVN) has reported that electricity output in the entire system reached 158 billion kWh in the first seven months of this year, of which coal-fired power and hydroelectricity still played the leading roles, with output of 63.94 billion kWh and 52.58 billion kWh, respectively, or 40.5 per cent and 33.3 per cent of the total. Renewable energy output stood at 22 billion kWh, accounting for 14 per cent.