Power price moves and market fragmentation
On 28 July 2026, Southeast European power prices jumped as evening scarcity offset record solar output. In parallel, trading notes pointed to a split between markets despite stronger renewables and lower import needs. On 31 July 2026, the SEE power complex was described as fragmented, with Paks outage risk driving a Central European premium.
Market coverage also highlighted that Southeast Europe’s electricity market shifted beyond renewables, with grid integration and storage shaping the next investment cycle. A separate trading note dated 29 July 2026 linked higher prices in Serbia and Hungary to nuclear outages and rising demand, while Greece diverged. Another note on 27 July 2026 said Serbia decoupled as demand rebounded and German solar widened regional spreads.
Nuclear operations and Danube-linked constraints
Romania’s nuclear situation remained central to regional supply expectations during the period. On 29 July 2026, a Cernavoda shutdown was reported to have turned Romania from exporter into importer as the Danube reached critical levels. On 1 August 2026, Cernavoda kept its second reactor online while Romania managed drought risk.
Hungary’s exposure to cooling water constraints was also flagged on 1 August 2026, when Paks shutdown risk was linked to dependence on Danube cooling water. Serbia began an institutional phase of its nuclear programme with French support on 1 August 2026. Separately, Nuclearelectrica launched a 20-year power auction to support refurbishment of Cernavodă Unit 1 on 27 July 2026.
Electricity generation shifts across countries
Bulgaria’s electricity output rebounded year on year despite softer May demand on 1 August 2026. In Bosnia, coverage said Ugljevik remained offline on 29 July 2026, with coal shortages exposing the fragility of Republika Srpska’s power system. Bosnia’s electricity output later rebounded as thermal generation regained dominance on 29 July 2026.
Other generation dynamics were reported across the region: North Macedonia’s electricity production rose on 27 July 2026, with hydro and wind offsetting weaker thermal output. Slovenia’s June power balance shifted toward hydro and renewables as thermal output contracted on 28 July 2026. Montenegro secured grid debt before adding generation on 30 July 2026, while Western Balkan electricity prices detached from Bulgaria and Italy on 30 July 2026.
Hydrogen corridor planning and storage-linked gas security
North Macedonia mapped a hydrogen corridor linking Greece, Serbia and European networks on 28 July 2026. In gas markets, reporting described a shift in security focus from headline supply toward storage discipline on 30 July 2026. Croatia was also said to be turning to HEP as slow storage injections threatened winter gas security on 28 July 2026.
The Central European gas corridor angle continued with Krk LNG expansion strengthening Croatia’s position on 28 July 2026. Vertical Gas Corridor expansion into the western Balkans was reported on 31 July 2026. A separate thread noted that Federation of Bosnia and Herzegovina reduced its electricity trade exposure on 31 July 2026, alongside Bosnia seeking lower CBAM costs for electricity exports.
Gas price adjustments and supply-cost pass-throughs
Bulgargaz reversed its August price proposal after an Azerbaijani supply disruption was reported on 1 August 2026. On 31 July 2026, Bosnia’s southern gas route gained commercial case as Russian supply costs rose, while Bosnian gas prices increased as Gazprom passed through higher supply costs. A separate report dated 27 July 2026 said Bosnia’s Russian gas price rose by 14.4%, citing that supply concentration became more expensive.
The same period included reporting that Bosnia’s hydro recovery cut imports as coal generation retreated on 27 July 2026. Croatia’s growing negative-price exposure was tied to storage being a market necessity on 27 July 2026. Region-wide coverage also referenced how Danube drought turned energy security into a multi-asset problem on 30 July 2026.
Nuclear programme progress and hydropower project selection in Serbia
Ahead of broader nuclear milestones, Serbia’s nuclear programme moved into an institutional phase with French support on 1 August 2026. In hydropower, Bechtel and ENKA advanced to the second phase of Serbia’s €2.63bn Đerdap 3 process on 30 July 2026. On 27 July 2026, Bechtel advanced alone in Serbia’s Đerdap 3 selection process.
Cernavodă refurbishment auction alongside oil, solar and wind project updates
Nuclearelectrica’s auction for Cernavodă Unit 1 refurbishment ran for a term of 20 years, announced on 27 July 2026. Oil developments included higher oil prices returning NIS to profit while sanctions continued to dominate risk on 1 August 2026. The same date reported NIS agreeing a Romanian exit as sanctions reshaped its regional business.
NIS fuel logistics, JANAF earnings and Slovenia fuel levies suspended
NIS sought another US waiver due to ownership uncertainty threatening Serbia’s fuel supply chain on 29 July 2026. Serbia released diesel stocks as low Danube disrupted fuel logistics on 27 July 2026. JANAF’s stable first-half earnings supported expansion beyond oil transport on
Croatia household solar-battery programme; Romanian solar connection; Montenegro solar pipeline; wind financing and grid approvals; PPC Hungary solar acquisition option; Iratoșu EPC mandate; Gura Văii construction finance; Korita grid agreement; renewable certificates volume; environmental compliance ruling; CBAM cost focus; Ugljevik offline coal shortage context; Slovenian retail price linkage via suspended levies; Krk LNG corridor positioning; Vertical Gas Corridor expansion; hydrogen corridor mapping; storage discipline emphasis; Danube drought multi-asset energy security framing; Paks outage risk premium; Cernavodă shutdown importer/exporter shift; drought risk reactor online status.
Croatia opened a household solar and battery programme worth €38 million on 27 July 2026 . Nofar connected a Romanian solar plant of 146 MW and advanced a large storage portfolio on 1 August 2026 . In Montenegro, the Rudine solar project reached construction-ready stage 31 July 2026 , while EPCG and Masdar began a renewable programme with 190 MW of solar capacity 29 July 2026 .
An integrated EPC mandate for the 58 MW Iratoșu solar project was won by Ameresco Sunel 28 July 2026 . PPC entered Hungary with a 57.5 MW solar acquisition and a battery option 27 July 2026 . Solar-related reporting also included Albania converting development-bank support into implementation work 30 July 2026 .
BCR financing moved OMV Petrom and Renovatio’s Gura Văii wind farm into construction 28 July 2026 , while Korita wind project secured grid agreement but permitting work remained 27 July 2026 . Croatian renewable certificates cleared at narrow premiums as more than 312,000 guarantees were sold
