Farms and rooftop panels contribute 14.4% to the grid – and figures reveal a surge in new installations
Solar energy supplied more power to Great Britain’s grid in July than in any previous month as households turned to rooftop panels to cut their energy bills.
Solar farms and rooftop panels provided 14.4% of the country’s electricity after some parts of the UK recorded almost twice the average sunshine hours for the time of year.
We would like to hear from people who have recently installed renewable energy sources in their home, or considered doing so
Great Britain has recorded more new solar power installations in the first half of this year than in any six-month period since 2011, with most of the new panels going onto household rooftops rather than large-scale solar farms.
The government’s data also shows a rise in households turning to other low-carbon technology: applications to the boiler upgrade scheme, which offers grants for replacing gas boilers with greener alternatives, reached 4,512 last month – up 21% on June last year – with demand for heat pumps expected to climb further in the months ahead.
Boom in solar farms and home installations in first half of 2026 began shortly after start of US-Israel war against Iran
Great Britain has recorded more new solar power installations in the first half of this year than in any six-month period since 2011, as households turn to rooftop panels to help cut their energy bills.
An analysis of the government’s official figures shows that Great Britain added 142,536 solar installations in the first six months of the year, putting it on track to top last year’s record solar additions.
Organised campaigns against wind and solar energy have proved “extremely effective” in undermining community support for renewable energy but enthusiasm for electric vehicles has jumped after Donald Trump’s attack on Iran, according to a detailed snapshot of Australian attitudes to the clean energy transition.
The survey found levels of “deep support” for clean technologies were highest for home batteries and rooftop solar and also improving for major infrastructure projects such as transmission lines, which have been a target for critics of renewables.
A different kind of energy project has arrived in central Utah’s Castle Valley, with the launch of Green River Energy Center—a facility boasting a million solar panels and close to 500 batteries spanning several square miles.
The sprawling new facility, which officially went online in June, was recently captured in satellite images obtained by the U.S. Geological Survey’s Landsat-8 satellite.
The region has long been associated with energy production, beginning with coal mines beneath Utah’s Wasatch Plateau, which, in the late 1800s, helped establish the region as an important source of fuel well over a century ago.
Now, with the launch of the Green River Energy Center, the massive energy facility, located around 130 miles south of Salt Lake City, reportedly boasts 400 megawatts of solar-generating capacity along with another 400 megawatts of battery storage.
At such production levels, the new facility now ranks among some of the largest and most promising utility-scale solar and battery projects that U.S. officials anticipate will be linked to the U.S. electrical grid by the end of the year.
(Image Credit: Lauren DauphinUSGS/NASA)
Growing Concerns of U.S. Power System Failures
The Green River Energy Center has launched its operations amid growing concerns about the strain on the power grid that ensues during the summer amid elevated temperatures. On Sunday, the U.S. Department of Energy (DOE) issued an emergency order to help ensure power could be maintained across 17 U.S. states that are currently being impacted by extreme temperatures.
The order specifically orders generation units maintained by Southwest Power Pool, Inc., to be dispatched, along with maintaining its backup generation resources only as a last resort before any declaration of an Energy Emergency alert (EEA) 3.
“The Trump Administration is tapping into an abundant supply of unused backup generation to maintain affordable, reliable, and secure power for hardworking American families and businesses,” said U.S. Secretary of Energy Chris Wright in a statement.
Batteries and a Million Solar Panels
With its unprecedented million-solar-panel facility, the Green River Energy Center is anticipated to become a major provider to Salt Lake City and other parts of Utah, with project staff estimating that it could generate enough electricity to serve more than 100,000 homes.
Although the site’s massive solar array is what is most eye-catching in the newly released satellite imagery, it is the facility’s battery system that has been getting attention. A primary reason is the system’s ability to store electricity produced during periods of strong sunlight and heat, the likes of which many states are currently experiencing. This allows the facility to continue supplying power even after sunset, or during periods of cloud coverage where less solar generation is available.
Additionally, the project leverages Castle Valley’s existing energy infrastructure. Transmission lines dating back to the region’s coal-powered energy facilities can now help move electricity back into the broader grid, which helps the project build off of existing power infrastructure in the region.
Coal Remains Important
Coal still plays an important role in Utah’s history. The state’s official rock, this fundamental fuel source has long been what drives the state’s energy systems, although that has significantly declined in recent years.
Coal still accounted for close to 75 percent of Utah’s electricity generation a little more than a decade ago. As of 2025, that figure had fallen to nearly half, while solar power had seen a major increase in use during the same period, rising from almost no use in 2015 to producing close to 14 percent of the state’s electricity by 2025.
The Big Picture
More than just revealing a view of power generation facilities like the Green River Energy Center from space, satellite observations that include the new Landsat imagery can help document changes like these, as energy infrastructure expands across the landscape.
That data can often be vital in terms of helping planners and policymakers working to evaluate the renewable energy potential of a region like central Utah, as well as helping to monitor how new energy systems are adopted and perform over time.
For Castle Valley, the Green River Energy Center represents the latest chapter in a long history of producing energy for Utah, and one that builds on some of the fundamental infrastructure that taps into the state’s history of coal production.
Additional details about the new Landsat-8 imagery can be found here.
Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached atmicah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.
Law change means renters and flat owners may be able to cut bills as energy costs soar amid Iran war
British households will be able to buy plug-in solar panels later this summer after the government changed the law so the UK’s biggest retailers could bring them to market for the first time.
People across the country will be able to join the millions across Europe generating their own electricity using “balcony solar panels” from 27 August, according to legislation passed last week.
Apartment living can be a barrier to solar and battery adoption. Here’s how to navigate the hurdles and practicalities
Change by degrees offers life hacks and sustainable living tips each Saturday to help reduce your household’s carbon footprint
Got a question or tip for reducing household emissions? Email us at changebydegrees@theguardian.com
Australia is a world leader in household solar, but the benefits of rooftop renewables are unevenly distributed – and many of the 2.5 million people living in apartments or units are missing out.
About 39% of Australians living in detached or semi-detached houses have solar, compared with 6% of those in apartments or units, research by Energy Consumers Australia (ECA) finds. A gap also exists in the take-up of batteries, installed in 7% of houses but only in 3% of apartments or units.
Reflect Orbital staff shown standing by one of its large reflective surface components (Credit: Reflect Orbital)
Welcome to this week’s installment of The Intelligence Brief… a controversy has erupted in recent days with the FCC’s approval of a proof-of-concept satellite that reflects daylight to Earth at night, in a move that has astronomers concerned. In our analysis, we’ll be looking at 1) the FCC’s approval of Reflect Orbital’s Eärendil-1 satellite, 2) what the company says about its sunlight mirror orbital technologies, 3) the sharp responses from the astronomical community, and 4) where things go from here as the demonstration satellite heads toward production.
Quote of the Week
“While we fully support American technical innovation in space, this innovation cannot come at the cost of imperiling scientific research, which has been at the forefront of American innovation and global leadership for decades.”
– American Astronomical Society statement
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FCC Approves Launch of Satellite Designed to Reflect Sunlight to Earth’s Nightside
This week, in a controversial ruling that has sky watchers (and others) concerned, the U.S. Federal Communications Commission (FCC) approved the launch of an experimental satellite crafted to reflect sunlight onto Earth after sunset.
The move has seen significant pushback from astronomers, who now warn that the technology would likely interfere with scientific observations and alter the natural appearance of the night sky.
Dubbed Eärendil 1, the satellite is being developed by the California-based Reflect Orbital as a proof-of-concept for the company’s larger, and potentially even more impactful vision: as many as 50,000 orbiting mirrors capable of directing sunlight to different regions on Earth.
While astronomers have expressed concern over the implementation of such orbital systems, the company says its satellites would offer the possibility for providing illumination after dark in select areas, which could be used to extend the operation hours for solar powered facilities.
Eärendil 1: A Case Study in Controversy
Branding itself as “the sunlight company,” Reflect Orbital says in a statement at its website that it aims to provide “clean, abundant energy available on demand,” because “reliable access to affordable energy is the foundation of human progress, economic growth, and a healthier planet.”
The satellite, which shares its name with Eärendil the Mariner, a character from J.R.R. Tolkien’s mythos, will carry an 18-by-18-meter (59-by-59-foot) reflective Mylar surface that unfolds in orbit after launch. Operating roughly 625 kilometers (390 miles) above Earth, the spacecraft is designed to redirect sunlight onto specific target areas of approximately five kilometers (three miles) in width.
Although many are sounding the alarm about the potential consequences of such technology, the Reflect Orbital says it maintains strict exclusion zones where astronomical operations or “sensitive areas” exist, and that its technology can be carefully deployed only to regions identified as target areas.
According to a FAQ page on the company’s website, the light produced by Eärendil 1 and future members of the company’s constellation will be “contained within the spot” among several other safety features it promotes. The company also says it can turn off the light quickly, and disable it at any time to prevent light from reaching Earth.
“The light is not bright enough to start fires or harm eyes,” the company’s FAQ page states, “even when viewed through a telescope, and cannot be concentrated past maximum natural sunlight irradiance.”
The company’s CEO, Ben Nowack, has argued the concept could improve the economics of solar power overall, allowing Earth-based power systems the ability to harvest additional sunlight before sunrise and after sunset.
Criticism Abounds
The proposal has drawn criticism from several groups, particularly the American Astronomical Society (AAS), which urged the FCC to reject the application.
“The American Astronomical Society (AAS) is dismayed by the Federal Communications Commission (FCC) decision on 9 July to grant a license to Reflect Orbital,” the organization said in a statement following the FCC ruling. “As the AAS expressed to the FCC, Reflect Orbital’s proposed satellite, which would reflect sunlight back to Earth at night, carries the potential for significant harm to our members and the broader community of those who depend on a dark night sky.”
“This harm could include damage to sensitive research telescope equipment, potential flash-blinding of pilots and drivers, and — as Reflect Orbital stated in its own FCC filings — potential permanent eye damage to anyone looking through a mid-sized telescope,” the AAS statement adds, noting what appears to be a sharp contrast between information contained in FCC filings, and that which appears on the company’s website.
Further, research cited by the AAS suggests that a full constellation of Reflect Orbital satellites could increase nighttime sky brightness by a factor of two to three, even at remote observatories, due to atmospheric scattering of the reflected light.
“While we fully support American technical innovation in space, this innovation cannot come at the cost of imperiling scientific research, which has been at the forefront of American innovation and global leadership for decades,” the AAS statement concludes.
Beyond FCC Authority
However, in the wording featured in the agency’s approval, the FCC concluded that such concerns fall outside its authority, which is primarily limited to regulating the use of radio-frequency spectrum, adding that it believes the overall likelihood of injury resulting from the launch of the proof-of-concept satellite to be low.
In the meantime, while the FCC’s approval marks an early win for Reflect Orbital, the company has said that it is planning to have independent research commissioned to help assess the technology’s environmental and scientific impacts. Additionally, the company says it plans to coordinate with the National Science Foundation to help ensure that its efforts align with those of the broader scientific community.
Fundamentally, the AAS’s disappointment—a view expressed by other members of the scientific community, argues that the ruling presents broader questions about who should oversee the environmental consequences of future space-based illumination projects, especially if such systems end up becoming more widespread in the years ahead.
“In the absence of another licensing agency that could take these considerations into account, we believe that it is critical for the FCC to consider all of the impacts of the satellite’s use case,” the AAS said in its statement this week.
Claims by the Coalition and One Nation that abandoning a net zero climate target would bring down power prices are contradicted in a new CSIRO report on the costs of generating electricity.
Generation costs will probably rise after 2030 regardless of Australia’s policy on net zero, according to the CSIRO’s annual GenCost report, but prices should then stabilise at levels below recent price spikes.
Timing of Devon switchoff ‘could not be worse’, says board, as members face an estimated £2m in lost revenue
Britain’s biggest community solar project has been forced to shut for the duration of its first summer by the government’s energy system operator to avoid overloading the local grid with renewable energy.
The north Devon solar farm was ordered to shut weeks before record high temperatures across Europe led to power supply warnings, due to concerns that the large amount of rooftop solar in the area could destabilise the power grid by triggering a “thermal overload”.
The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
I would like to know why we build solar farms over green space, when we could just put them over massive car parks as a popular current internet meme suggests. Chris, Middlesbrough
China Three Gorges Corporation (CTG) has put the world’s largest solar PV-plus-concentrated-solar hybrid into commercial trial operation in the Gobi Desert — and its headline trick is delivering power after sunset without a single lithium battery.
The 1-gigawatt Hami project in Xinjiang stores the sun’s energy as heat in molten salt, letting it keep generating for up to eight hours after dark.
New Economics Foundation and Finance Innovation Lab suggest loan scheme backed by Bank of England could benefit up to 8m homes
Millions of UK households could save hundreds of pounds a year on their energy bills if the government were to approve low-cost loans for solar panel installation, research has found.
I would like to know why we build solar farms over green space, when we could just put them over massive car parks as a popular current internet meme suggests. Chris, Middlesbrough
Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.
For months I’ve been trying to receive my FIT payment, which should be more than £1,000
I moved into my new house 14 months ago, and soon afterwards applied to ScottishPower, with whom the solar panels are registered for a feed-in tariff (Fit), for transfer of ownership of the panels and the tariff.
After many emails back and forth, I got a response saying they had all the information required.
A handful of Great Britain’s gas power plants were paid almost £4m to generate electricity for just a few hours on Tuesday evening as millions of sweltering viewers turned to air conditioning, electric fans and icy drinks during England’s second World Cup game.
The heatwave has caused electricity prices across Europe to surge this week amid higher demand for cooling and a string of power plant outages due to the record high temperatures.
Solar panels are overheating amid soaring temperatures, leading to gas power stations across the UK being ordered to fire up production to make up the shortfall.
Bosses of some of Britain’s biggest retailers are discussing plans with the government to start selling plug-in solar panels as part of a drive to encourage more UK homes to generate their own electricity.
Executives from brands including Currys, B&Q and Amazon met Martin McCluskey, the minister for energy consumers, on Tuesday to discuss guidelines for selling “balcony solar panels” to the British public.
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