France, Germany, Portugal and Spain each set new daily solar generation records in late May, pv magazine confirmed on June 3. Germany produced 503 GWh of solar in a single day on May 28; Spain followed with 265 GWh.
The records came during an early heat dome that pushed Portugal to 40.3°C and the UK to 35.1°C. Solar is no longer a marginal contributor on hot afternoons. It is increasingly the system, which makes the week's quieter stories, about storage, enforcement and market rules, the ones that actually decide whether that power gets used. (pv magazine)
Energy Transition
Romania gets its first large-scale battery as Eastern Europe starts closing the flexibility gap
The EBRD agreed on June 4 to provide up to €44 million to finance one of Romania's first large-scale standalone battery storage systems, on a non-recourse project-finance basis. The structure matters: lenders are now willing to back merchant storage revenue in a Central European market, not just subsidised assets.
Storage is the direct answer to the solar peaks setting records further west. Without it, midday abundance turns into curtailment and negative prices rather than usable evening supply.
Romania has lagged on flexibility while building renewables, so a bankable first project is the precedent that lets the next ten happen faster. (EBRD)
Vienna's gas phase-out and a Dublin data-centre heat scheme win EUSEW recognition
The European Sustainable Energy Week awards were announced in Brussels on June 9, opening the event's 20th edition. Vienna's "100 Projects Phasing Out Gas" took the Local Energy Action prize for its push to fully renewable heating and cooling by 2040.
The Women in Energy award went to Donna Gartland of Codema, Dublin's energy agency, for Ireland's first large-scale district heating scheme drawing waste heat from data centres. That reframes a familiar complaint: data centres are usually counted only as a load on the grid, but their waste heat is a resource a city can plumb into homes. (CINEA)
Climate Tech
China's solar slump reshapes the cost base for European installers
China installed a record 315 GW of solar in 2025, but March 2026 installations fell 56% year-on-year and April dropped 79%, Carbon Brief reported on June 5. The cause is a February 2025 shift from fixed tariffs to contracts-for-difference.
The knock-on for Europe is in the export figures. Chinese solar exports rose 60% year-on-year in April, keeping module prices low for European buyers but deepening the dependence the Net-Zero Industry Act was written to reduce. (Carbon Brief)
Policy & Regulation
Commission sends Spain and Poland to court over emissions trading rules
The Commission's June 4 infringements package referred Spain and Poland to the Court of Justice for failing to transpose the revised EU Emissions Trading System rules, with financial sanctions requested. Spain was cited for both the aviation ETS and the wider 2023 revision; the transposition deadline was the end of 2023.
Reasoned opinions also went to Cyprus over incomplete transposition of the renewables permitting directive, and to Hungary and Romania on energy efficiency. The enforcement signal is blunt: the legislative architecture of the Green Deal only works if member states actually write it into national law, and several have not. (European Commission)
CBAM's definitive-phase consultation closes June 10
The public consultation on detailed rules for the Carbon Border Adjustment Mechanism's definitive regime closes today. From 2026 CBAM applies in full, with free ETS allowances for covered sectors cut 2.5% annually as the border levy phases in.
For European steel, cement and aluminium producers, the detail being consulted on determines real compliance costs from next year. Importers and exporters are pressing for clarity on how embedded emissions are calculated before the system bites. (European Commission)
UK proposes an 87% emissions cut by 2040
The UK government proposed on June 5 cutting greenhouse gas emissions to 87% below 1990 levels by 2040, a target its climate advisers say keeps the 2050 net-zero goal in reach. The plan estimates roughly £880 billion of investment over 25 years against £1,620 billion in benefits.
It needs parliamentary approval to become binding. With Conservative and Reform politicians pledging to unwind net-zero commitments, the target is set to become a political flashpoint rather than a technocratic formality. (Carbon Brief)
Science
The instruments that watch Europe's climate lifeline are losing their funding
Carbon Brief reported on June 9 that the US government plans to dismantle ocean moorings in the Irminger Sea that help monitor the Atlantic Meridional Overturning Circulation, the current system that keeps Europe temperate. Two of the moorings feed the international OSNAP array.
Researchers describe the OSNAP and RAPID monitoring arrays as in "critical condition," with funding vulnerable across several countries. The risk is not the circulation collapsing tomorrow but losing the ability to see it change at all, which is harder to reverse than it sounds. European institutions now have an opening to backstop arrays that have depended heavily on US support. (Carbon Brief)
One to Watch
Whether Brussels softens the 90% gas storage target for 2026
EU gas storage entered 2026 unusually low after a cold winter, and most member states will struggle to hit the mandated 90% fill level by November 1. Policymakers are weighing a relaxation to around 80%, with an amendment to the Gas Storage Regulation moving through the legislative process.
The tension is real and worth watching. A lower target eases the scramble for expensive summer LNG and the price spikes it causes, but it thins the buffer if next winter turns hard or supply is disrupted. Watch for the Commission's position over the summer and how the Parliament responds. (European Parliament)