Solar power generation in the UK reached a new record over the summer of 2026, as temperatures across the nation soared, according to new analysis by Carbon Brief.
Collectively over June, July and August, solar farms and rooftops generated 8.8 terawatt-hours (TWh) of electricity in the UK*, as shown in the chart below.

Speaking to Carbon Brief, Chris Hewett, chief executive of trade association Solar Energy UK welcomed the new record, adding that it was driven by “clear skies and continued growth in deployment”.
This surge in generation took place amid the hottest summer on record in the UK, with five heatwaves between May and August.
Summer 2026 was the sixth sunniest on record, with more than 620 hours of sunshine, according to the Met Office. England and Wales – which experienced the most extreme heat – saw their second-sunniest summers on record.
June 2026 was the hottest June in England since records began in 1884, according to Met Office data, while Wales and the UK as a whole experienced their second-warmest June.
It was the driest July for England and Wales since records began in 1836, with some parts of London seeing no rain at all in the month, while Wisley in Surrey had no rain for 62 days.
In England, temperatures peaked at 38.1C at Kew Gardens in London on 13 August.
According to the Met Office, this summer’s record mean temperature was made 130 times more likely by climate change.
Amid these hot and sunny months, solar power generation increased 23% from the same period in 2025. This is double the level of solar generation over the summer of 2021, according to Carbon Brief analysis.
While solar panels can be affected by periods of extreme heat, the longer hours of daylight and higher levels of irradiation over the summer more than offset any efficiency losses.
June, July and August all saw solar set new monthly records for solar generation – July saw the highest solar generation in a calendar month ever, with 3.3TWh meeting 15% of overall electricity demand for the month.
As of the end of August, the total UK solar generation in 2026 stood at 17TWh – 13% higher than the same point in 2025.
The number of solar farms and rooftop installations has grown substantially in recent years, helping to boost generation. Domestic rooftop solar accounts for around 29% of total capacity.
In 2025, the UK’s solar capacity reached 21 gigawatts (GW) by the third quarter of the year, according to UK government figures. This is a jump of 3GW, or 18%, year-on-year, as Carbon Brief reported in January.
(Capacity is the maximum output possible from an electricity generation, whereas generation is what was produced over a certain time period, such as a day, month or year.)
According to the University of Sheffield, the installed solar capacity is now nearly 24GW.
This includes nearly 172,000 solar installations that have been fitted across the UK since the start of 2026, according to recent government figures. In July alone, more than 19,800 rooftop solar panels were installed – the equivalent of one installation every two minutes.
In total, nearly 1.7m households in the UK now have solar panels installed.
Over 26 heatwave days this summer – periods of at least three days when temperatures exceed the Met Office’s county-level heatwave temperature threshold – UK households with rooftop solar panels avoided an estimated £86.7m in electricity costs, according to analysis by Utility Bidder.
Talking about the surge in solar generation this summer, Hewett says:
“[It] not only kept bills down for people with solar and batteries in their homes, but helped keep overall power prices much lower than they would have been if Britain had been relying on more gas generation during the day”.
Despite the record generation, no new half-hourly solar power output record was set in the summer of 2026. This still stands at 15.2 megawatts (MW) on 23 April 2026.
* This article refers to the UK throughout, but strictly relates to the island of Great Britain, made up of England, Scotland and Wales. Northern Ireland is part of the separate, all-Ireland electricity system.
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The post Analysis: UK solar power hits record high over summer 2026 appeared first on Carbon Brief.
Climate Change
Australia says COP31 co-presidency will work on a cover decision
Australia and Türkiye have agreed to take forward a “presidency-led decision for COP31” after consulting with different countries and groups, Australia’s climate change and energy minister said on Wednesday at the pre-COP meeting in Fiji.
The announcement that November’s climate conference will produce what is known among negotiators as a “cover decision” lays to rest the annual speculation over how the main outcomes of the UN climate conference will be presented this year.
Unlike other formal decision texts at COP, cover decisions are not negotiated word by word between governments. They are often summaries crafted during the proceedings by the presidency, although they still need to be adopted by consensus. Cover texts bring together key elements and initiatives emerging from the discussions at the two-week UN climate talks and give a sense of the political direction of travel for the coming year.
Australian minister Chris Bowen, who will preside over the negotiations at COP31 in the Turkish seaside resort of Antalya, said the presidency did not want to negotiate “a lengthy political statement”. The two countries are sharing the presidency in an unusual arrangement, although Türkiye has the formal title of COP31 President.
The decision, he explained, will be one that “captures the global moment and calls for action”, adding that it would offer “a focused and concrete response to the challenges and opportunities of our time”.
Bowen said the text could recognise the recent UN report acknowledging that an overshoot of the 1.5C warming limit is now inevitable, but temperatures could be brought back down to that level. The decision could also stress “the urgent need for climate action, support and international cooperation to go further and faster”, he added.
With COP31 President Murat Kurum sitting next to him, smiling and nodding, Bowen said the joint presidency aimed to be open and transparent, giving governments an early idea of what to expect from the COP31 process.
Earlier in the week, they published a second joint letter laying out key areas for progress at the negotiations, from setting up a just transition mechanism to putting science at the centre of the next global stocktake of climate plans and focusing governments on the need to increase adaptation finance.
Cosima Cassel, climate diplomacy lead at think-tank E3G, said a COP31 cover decision should send a clear political signal that accelerating climate action is central to global security, prosperity and resilience, show that faster implementation can help address 1.5C overshoot, and support developing countries to put their climate plans into practice.
EU keen to know “what success looks like”
Earlier on Wednesday, Europe’s climate commissioner Wopke Hoekstra told journalists in Fiji that the European Commission had asked the UN and COP31 organisers to provide clarity on the summit’s agenda and “what success would look like” in Antalya.
That is why, he added, “I… like it a lot that the organisers are pushing for electrification and are already clear about it upfront”.
A voluntary goal for electricity to provide 35% of the world’s final energy consumption by 2035, up from 23% today, was announced by Türkiye at the Bonn mid-year climate talks. It has since been garnering support for the target, which was developed with the backing of international energy agencies. Australia said on Wednesday it would sign up for the goal.
However, it remains unclear if or how this goal will be reflected in the COP31 cover decision, as including it in a document that has to be endorsed by all countries could influence its form.
COP31 electrification pledge leaves out clean power commitment
In recent years, blocking tactics by powerful fossil-fuel producing countries like Russia, Iran and Saudi Arabia have made it difficult for COPs to make headway on a 2023 decision to transition away from fossil fuels (TAFF).
At COP30 in Belém, Brazil had to offer to develop a voluntary TAFF roadmap at the last minute after failing to secure support to launch the process as part of the formal UN talks. There was also confusion over whether COP30 would produce a cover decision, with Brazil holding its cards close to its chest until the second week, when it decided to put together the “Mutirão Decision”.
Electrification goal in cover decision?
This time around, it is now practically certain that COP31 will produce a cover decision, but a key question is whether the co-presidency will somehow try to anchor the voluntary electrification pledge in that text.
Doing so could make it hard to specify that the electricity to meet the target should come from clean, renewable sources, due to potential objections from some countries. The proposed text for the electrification pledge, unveiled on the sidelines of the General Assembly last month, did not make that commitment.
E3G’s Cassel said the COP31 cover decision needs to specify that electrification will be clean “otherwise there is a strong risk that fossil fuel projects are supported by the pledge”. It also must outline the support needed to enable the 35×35 goal to be met, rather than just the top-line target, she added.
On Wednesday, the EU’s Hoekstra said “the whole main effort” towards the electrification goal “should be focusing on renewables”, while nuclear could also be part of the solution.
The energy transition, he added, “is about making sure we transition away from fossil fuels, as the world has already agreed on – so then doubling down on solar, on wind, on battery capacity, on all these elements should be at the very heart of it”.
The post Australia says COP31 co-presidency will work on a cover decision appeared first on Climate Home News.
Australia says COP31 co-presidency will work on a cover decision
Climate Change
Large flotilla brings Pacific voices and message to leaders at Pre-COP meeting: Keep 1.5C Alive
NADI, FIJI Wednesday 7 October 2026 — Around 80 people including Pacific and Torres Strait community members, Elders and youth activists travelled as part of a colourful flotilla past the Pre-COP venues with a message for leaders: ‘Keep 1.5°C Alive’.
High res footage and images available here
The large flotilla included traditional Fijian voyaging vessel the Uto Ni Yalo, six 6-person outrigger canoes, and Greenpeace campaigning vessel the Oceania which sailed from Sydney to the Pre-COP in Nadi. On board were Elders, climate-vulnerable communities members from across the Pacific and Torres Strait, youth activists and poets, and campaigners and climate experts from across the region.
Messaging on canoes and banners said ‘Hold the Line at 1.5°C’ and ‘Keep 1.5°C Alive’ — a reminder to leaders that the climate limit established under the Paris Agreement is a non-negotiable survival line.
Shiva Gounden, Head of Pacific at Greenpeace Australia Pacific, said: “People from across the Pacific and Australia have come together today to make sure the voices of our communities are heard by leaders meeting here in Nadi for the Pre-COP climate talks. The Taku Pakasoa Declaration adopted here at Pre-COP means ‘Strength in Unity’, and that’s how we’re coming together today.
“Our message is clear: Hold the Line on 1.5°C and centre those most impacted by the climate crisis in your decision-making. Our children’s futures must not be stolen away so that polluting nations can continue down the fossil-fuel path.
“Limiting global heating to 1.5°C is a non-negotiable survival line for Pacific communities and for humanity. Every cyclone, every storm now blows with the deadly force of accumulated emissions and gives a warning of what is to come as we face a dangerous summer of climate-fuelled extreme weather. Do not ignore our voices.”
On board, Aigagalefili Fepulea’i-Tapua’i, Pacific youth climate advocate and poet from Aotearoa Climate Action Network, said: “To hold the line on 1.5C for our Pacific family, New Zealand, as the only country where the connection between environmental protection and indigenous rights is legally validated by our constitutional document, must protect the rights of Māori.”
ENDS
Media contact: Kate O’Callaghan in Nadi on +61 406 231 892 (Whatsapp/Signal)
Large flotilla brings Pacific voices and message to leaders at Pre-COP meeting: Keep 1.5C Alive
Climate Change
A ‘victory’ for communities as High Court rules climate impacts from coal and gas must be considered even where fossil fuels are exported
SYDNEY, Wednesday 7 October 2026 — In response to the landmark High Court ruling that climate impacts of fossil fuel projects must be considered by NSW planning authorities, the following lines can be attributed to Joe Rafalowicz, Head of Climate and Energy at Greenpeace Australia Pacific
“The High Court decision today is a victory for communities that bear the brunt of the storms, bushfires and extreme weather fuelled by Australian fossil fuel corporations.
“Coal and gas companies have claimed they are not responsible for their pollution because it happens overseas, but today Australia’s highest court sided with common sense and scientific evidence to find that every new coal and gas approval in this country could put us at risk, no matter where it is sold or burnt.
“As leaders meet at the Pre-COP talks in Fiji this week, Pacific communities are reaffirming the importance of the 1.5C temperature limit as a survival line for humanity, and is a scientific, moral and legal obligation as affirmed by the landmark Pacific-led ICJ Advisory Opinion. The highest court in the world, and now in Australia, have been clear: it is legally imperative that all of the pollution from fossil fuel projects be considered before approving a new project.
“Now is the moment for the Australian Government, as COP31 President of Negotiations, to find the courage, leadership and grit our country is known for to chart a new course away from fossil fuels. This begins with showing leadership at home by ending new coal and gas approvals.”
-ENDS-
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