Electricity output from Bosnia and Herzegovina’s Višegrad hydropower plant declined in September, according to figures provided by operator Hidroelektrane na Drini, part of power utility ERS. The facility has an installed capacity of 315 MW. The latest month-to-month data show a sharp drop in generation compared with August.
September 2026 output compared with August and September 2025
Višegrad generated 21.49 GWh during September 2026. That total was down 35.6% from 33.35 GWh recorded in August. Compared with the same month a year earlier, production was also about 25.6% lower than the 28.88 GWh generated in September 2025.
The September figures were reported alongside performance over the rest of the year to date. Generation over the first nine months of 2026 remained comparatively substantial. Cumulative production reached 712.62 GWh, approaching the 781.8 GWh generated during all of 2025.
Annual generation levels and long-term average
In 2025, Višegrad produced 733 GWh, which was higher than the 733 GWh recorded in 2024. Despite that increase, output in 2025 remained significantly below its stated long-term average of approximately 1,010 GWh annually. The plant was commissioned in 1989.
The station operates three generating units of 105 MW each. Its highest recorded annual production was 1,283.05 GWh, registered in 2010. The reported monthly results also highlight differences between installed hydropower capacity and electricity volumes deliverable within a specific operating period.
Water availability and market implications for ERS
For ERS, water availability affects not only generation volumes but also the amount of electricity available for domestic consumption and potential export. Lower hydroelectric output can require greater use of other generating facilities or changes in electricity purchasing and sales schedules, depending on wider system conditions.
The commercial effect can be more pronounced when regional wholesale prices stay elevated. Electricity produced during high-price periods can carry additional value, while shortfalls may limit the utility’s ability to benefit from favorable market conditions . Višegrad’s generation figures therefore reflect how hydrological performance can influence the financial outlook for Southeast European electricity producers .
The cumulative position in 2026 provides some support to annual performance, but the September decline shows how quickly hydro availability can deteriorate within a single operating season .
