Electric energy resources rose 9.7% on the year to 22.2 billion kilowatts hour in the first four months, fueled by a 10.7% increase in production, the statistics institute INS said in a statement.
It said thermal power output was up 14.3% on the year to 11.4 billion KWh, while hydropower production increased 9.3% to 6.6 billion KWh.
Nuclear power production advanced 3.6% on the year to 4.04 billion KWh in January to April.
Romanian final power consumption reached 17.9 billion KWh in the first four months, up 3.9% from the same period of 2010. Public illumination fell 13% on the year, but household consumption rose 2.3%.
Total power imports inched down 0.1% on the year to 3.5 billion tons of oil equivalent.