Energy production rose 7.6% on the year in January through June, while manufacturing output edged up 0.1%, data adjusted for the number of working days and seasonal factors showed.
On the other hand, output in the mining sector fell 1.1% on the year in the first half.
In unadjusted data, Romanian industrial production inched up 0.2% on the year in January through June, the data showed.
For June alone, adjusted industrial output nudged down 0.4% from the previous month, but was up 1.4% compared with the same month of 2011. Unadjusted production decreased by 5.7% on the month in June and by 1.4% on the year.