Bulgarian electricity production reached 26,906 GWh between 1 January and 9 August, up 7.8% year on year. Consumption increased by 6.8% to 25,046 GWh, resulting in a trade surplus of 1,860 GWh. The surplus compares with 1,511 GWh in the corresponding 2025 period.
Renewables delivered via transmission and distribution
Renewable output delivered through the transmission system rose by 16.1% to 2,936 GWh. Distribution-connected renewable generation increased by 6.2% to 2,723 GWh.
Hydropower output rises sharply year on year
Hydropower production climbed to 3,396 GWh, compared with 1,811 GWh a year earlier. The year-to-date comparison indicates a stronger accumulated generation position for Bulgaria relative to many neighbouring markets.
Bulgaria’s role in regional balancing and interconnection flows
The combination of a generation surplus and rapidly expanding storage is increasing Bulgaria’s importance for regional balancing. Bulgaria can take in Greek and domestic solar during low-priced hours, store part of that energy, and release it when Romanian, Serbian or North Macedonian systems are short.
The value of interconnection capacity is also shifting as flows become more dynamic. The historic north-south pattern, under which Bulgarian thermal and nuclear output moved towards Greece, is changing as cheap Greek solar can move north at midday. During the evening, Bulgarian batteries and thermal units can reverse direction.
