Cross-border flows in the week to 20 September
In the week to 20 September, Greece increased net electricity exports, while Bulgaria stayed the larger regional exporter despite a smaller export surplus. Greek net exports rose from 91.93 GWh to 126.87 GWh. Bulgaria’s net export balance stood at 247.47 GWh, down 9.90% from the previous week.
Greece: demand and generation shifts behind higher exports
Greek electricity demand fell 9.32% to 1,019.36 GWh. Gas-fired generation declined 12.46% over the same period. Wind output increased 10.3%, partly offsetting a 9.2% fall in solar generation. The combination of lower demand and reduced gas generation coincided with the increase in net exports.
Bulgaria: hydro decline alongside stable thermal output
Bulgaria’s hydropower output dropped 28.51% to 37.61 GWh. Total thermal generation was broadly stable during the week. Despite maintaining a larger surplus than Greece, Bulgaria’s export balance fell by 9.90%. Its weekly day-ahead price decreased 2.93% to €162.07/MWh.
Day-ahead pricing and implications for traders
Greece averaged €155.42/MWh on a weekly basis for day-ahead power. The two markets reached export positions through different changes in demand and generation, with Greece exporting more as consumption fell and gas-fired output declined. Bulgaria maintained a much larger surplus, though reduced hydro output aligned with a smaller export balance. For cross-border traders, whether these export volumes persist as autumn demand changes depends on hourly generation and border capacity.
