Green energy project will help city reduce greenhouse gases

Nighttime Thermoelectric Generator converts radiative cooling into renewable energy, leveraging outer space cold; a Stanford-UCLA prototype complements solar, serving off-grid loads with low-power output during peak evening demand, using simple materials on a rooftop.

Key Points

A device converting nighttime radiative cooling into electricity, complementing solar for low-power evening needs.

✅ Uses thermocouples to convert temperature gradients to voltage.

✅ Exploits radiative cooling to outer space for night power.

✅ Complements solar; low-cost parts suit off-grid applications.

Two years ago, one freezing December night on a California rooftop, a tiny light shone weakly with a little help from the freezing night air. It wasn't a very bright glow. But it was enough to demonstrate the possibility of generating renewable power after the Sun goes down.

Working with Stanford University engineers Wei Li and Shanhui Fan, University of California Los Angeles materials scientist Aaswath Raman put together a device that produces a voltage by channelling the day's residual warmth into cooling air, effectively generating electricity from thin air with passive heat exchange.

"Our work highlights the many remaining opportunities for energy by taking advantage of the cold of outer space as a renewable energy resource," says Raman.

"We think this forms the basis of a complementary technology to solar. While the power output will always be substantially lower, it can operate at hours when solar cells cannot."

For all the merits of solar energy, it's just not a 24-7 source of power, although research into nighttime solar cells suggests new possibilities for after-dark generation. Sure, we can store it in a giant battery or use it to pump water up into a reservoir for later, but until we have more economical solutions, nighttime is going to be a quiet time for renewable solar power. 

Most of us return home from work as the Sun is setting, and that's when energy demands spike to meet our needs for heating, cooking, entertaining, and lighting.

Unfortunately, we often turn to fossil fuels to make up the shortfall. For those living off the grid, it could require limiting options and going without a few luxuries.

Shanhui Fan understands the need for a night time renewable power source well. He's worked on a number of similar devices, including carbon nanotube generators that scavenge ambient energy, and a recent piece of technology that flipped photovoltaics on its head by squeezing electricity from the glow of heat radiating out of the planet's Sun-warmed surface.

While that clever item relied on the optical qualities of a warm object, this alternative device makes use of the good old thermoelectric effect, similar to thin-film waste-heat harvesting approaches now explored.

Using a material called a thermocouple, engineers can convert a change in temperature into a difference in voltage, effectively turning thermal energy into electricity with a measurable voltage. This demands something relatively toasty on one side and a place for that heat energy to escape to on the other.

The theory is the easy part – the real challenge is in arranging the right thermoelectric materials in such a way that they'll generate a voltage from our cooling surrounds that makes it worthwhile.

To keep costs down, the team used simple, off-the-shelf items that pretty much any of us could easily get our hands on.

They put together a cheap thermoelectric generator and linked it with a black aluminium disk to shed heat in the night air as it faced the sky. The generator was placed inside a polystyrene enclosure sealed with a window transparent to infrared light, and linked to a single tiny LED.

For six hours one evening, the box was left to cool on a roof-top in Stanford as the temperature fell just below freezing. As the heat flowed from the ground into the sky, the small generator produced just enough current to make the light flicker to life.

At its best, the device generated around 0.8 milliwatts of power, corresponding to 25 milliwatts of power per square metre.

That might just be enough to keep a hearing aid working. String several together and you might just be able to keep your cat amused with a simple laser pointer. So we're not talking massive amounts of power.

But as far as prototypes go, it's a fantastic starting point. The team suggests that with the right tweaks and the right conditions, 500 milliwatts per square metre isn't out of the question.

"Beyond lighting, we believe this could be a broadly enabling approach to power generation suitable for remote locations, and anywhere where power generation at night is needed," says Raman.

While we search for big, bright ideas to drive the revolution for renewables, it's important to make sure we don't let the smaller, simpler solutions like these slip away quietly into the night.

This research was published in Joule.

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Japan Electricity Crunch exposes vulnerabilities in a liberalised power market as LNG shortages, JEPX price spikes, snow-hit solar, and weak hedging strain energy security and retail providers amid cold snap demand and limited reserve capacity.

Key Points

A winter demand shock and LNG shortfalls sent JEPX to records, exposing gaps in hedging, data, and energy security.

✅ JEPX wholesale prices spiked to an all-time high

✅ LNG inventories and procurement proved insufficient

✅ Snow disabled solar; new entrants lacked hedging

Japan's worst electricity crunch since the aftermath of the Fukushima crisis has exposed vulnerabilities in the country's recently liberalised power market, although some of the problems appear self-inflicted.

Power prices in Japan hit record highs last month, mirroring UK peak power prices during tight conditions, as a cold snap across northeast Asia prompted a scramble for supplies of liquefied natural gas (LNG), a major fuel for the country's power plants. Power companies urged customers to ration electricity to prevent blackouts, although no outages occurred.

The crisis highlighted how many providers were unprepared for such high demand. Experts say LNG stocks were not topped up ahead of winter and snow disabled solar power farms, while China's power woes strained solar supply chains.

The hundreds of small power companies that sprang up after the market was opened in 2016 have struggled the most, saying the government does not disclose the market data they need to operate. The companies do not have their own generators, instead buying electricity on the wholesale market.

Prices on the Japan Electric Power Exchange (JEPX) hit a record high of 251 yen ($2.39) per kilowatt hour in January, equating to $2,390 per megawatt hour of electricity, above record European price surges seen recently and the highest on record anywhere in the world. One megawatt hour is roughly what an average home in the U.S. would consume over 35 days.

But the vast majority of the new, smaller companies are locked into low, fixed rates they set to lure customers from bigger players, crushing them financially during a price spike like the one in January.

More than 50 small power providers wrote on Jan. 18 to Japan's industry minister, Hiroshi Kajiyama, who oversees the power sector, asking for more accessible data on supply and demand, reserve capacity and fuel inventories.

"By organising and disclosing this information, retail electricity providers will be able to bid at more appropriate prices," said the companies, led by Looop Co.

They also called on Kajiyama to require transmission and distribution companies to pass on some of the unexpected profits from price spikes to smaller operators.

The industry ministry said it had started releasing more timely market data, and is reviewing the cause of the crunch and considering changes, echoing calls by Fatih Birol to keep electricity options open amid uncertainty.

Japan reworked its power markets after the Fukushima nuclear disaster in 2011, liberalizing the sector in 2016 while pushing for more renewables.

But Japan is still heavily reliant on LNG and coal, and only four of 33 nuclear reactors are operating. The power crisis has led to growing calls to restart more reactors.

Kazuno Power, a small retail provider controlled by a municipality of the same name in northern Japan, where abundant renewable energy is locally produced, buys electricity from hydropower stations and JEPX.

During the crunch, the company had to pay nearly 10 times the usual price, Kazuno Power president Takao Takeda said in an interview. Like most other new providers, it could not pass on the costs, lost money, and folded. The local utility has taken over its customers.

"There is a contradiction in the current system," Takeda said. "We are encouraged to locally produce power for local consumption as well as use more renewable energy, but prices for these power supplies are linked to wholesale prices, which depend on the overall power supply."

The big utilities, which receive most of their LNG on long-term contracts, blamed the power shortfall on a tight spot market and glitches at generation units.

"We were not able to buy as much supply as we wanted from the spot market because of higher demand from South Korea and China, where power cuts have tightened supply," Kazuhiro Ikebe, the head of the country's electricity federation, said recently.

Ikebe is also president of Kyushu Electric Power, which supplies the southern island of Kyushu.

Utilities took extreme measures - from burning polluting fuel oil in coal plants to scavenging the dregs from empty LNG tankers - to keep the grid from breaking down.

"There is too much dependence on JEPX for procurement," said Bob Takai, the local head of European Energy Exchange, where electricity pricing reforms are being discussed, and which started offering Japan power futures last year. He added that new entrants were not hedging against sharp price moves.

Three people, who requested anonymity because of the sensitivity of the matter, were more blunt. One called the utilities arrogant in assuming they could find LNG cargoes in a pinch. Prices were already rising as China snapped up supplies, the sources noted.

"You had volatility caused by people saying 'Oh, well, demand is going to be weak because of coronavirus impacts' and then saying 'we can rely more on solar than in the past,' but solar got snowed out," said a senior executive from one generator. "We have a problem of who is charge of energy security in Japan."

Inventories of LNG, generally about two weeks worth of supplies, were also not topped up enough to prepare for winter, a market analyst said.

The fallout from the crunch has become more apparent in recent days, with new power companies like Rakuten Inc suspending new sales and Tokyo Gas, along with traditional electricity utilities, issuing profit downgrades or withdrawing their forecasts.

Although prices have fallen sharply as temperatures warmed up slightly and more generation units have come back online, the power generator executive said, "we are not out of the woods yet."
 

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Duke Energy Carolinas Solar RFP draws 3.9 GW of utility-scale bids, oversubscribed in DEP and DEC, below avoided cost rates, minimal battery storage, strict PPA terms, and interconnection challenges across North and South Carolina.

Key Points

Utility-scale solar procurement in DEC and DEP, evaluated against avoided cost, with few storage bids and PPA terms.

✅ 3.9 GW bids for 680 MW; DEP most oversubscribed

✅ Most projects 7-80 MWac; few include battery storage

✅ Bids must price below 20-year avoided cost estimate

Last week the independent administrator for Duke’s 680 MW solar solicitation revealed data about the projects which have bid in response to the offer, showing a massive amount of interest in the opportunity.

Overall, 18 individuals submitted bids for projects in Duke Energy Carolinas (DEC) territory and 10 in Duke Energy Progress (DEP), with a total of more than 3.9 GW of proposals – more nearly 6x the available volume. DEP was relatively more over-subscribed, with 1.2 GWac of projects vying for only 80 MW of available capacity.

This is despite a requirement that such projects come in below the estimate of Duke’s avoided cost for the next 20 years, and amid changes in solar compensation that could affect project economics. Individual projects varied in capacity from 7-80 MWac, with most coming within the upper portion of that range.

These bids will be evaluated in the spring of 2019, and as Duke Energy Renewables continues to expand its portfolio, Duke Energy Communications Manager Randy Wheeless says he expects the plants to come online in a year or two.

Lack of storage

Despite recent trends in affordable batteries, of the 78 bids that came in only four included integrated battery storage. Tyler Norris, Cypress Creek Renewables’ market lead for North Carolina, says that this reflects that the methodology used is not properly valuing storage.

“The lack of storage in these bids is a missed opportunity for the state, and it reflects a poorly designed avoided cost rate structure that improperly values storage resources, commercially unreasonable PPA provisions, and unfavorable interconnection treatment toward independent storage,” Norris told pv magazine.

“We’re hopeful that these issues will be addressed in the second RFP tranche and in the current regulatory proceedings on avoided cost and state interconnection standards and grid upgrades across the region.”

Limited volume for North Carolina?

Another curious feature of the bids is that nearly the same volume of solar has been proposed for South Carolina as North Carolina – despite this solicitation being in response to a North Carolina law and ongoing legal disputes such as a church solar case that challenged the state’s monopoly model.

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Ontario Wind Power Policy Shift signals renewed investment in renewable energy, wind farms, and grid resilience, aligning with climate goals, lower electricity costs, job creation, and turbine technology for cleaner, diversified power.

Key Points

A provincial pivot to expand wind energy, meet climate goals, lower costs, and boost jobs across Ontario’s power system.

✅ Diversifies Ontario's grid with scalable renewable capacity.

✅ Targets emissions cuts while stabilizing electricity prices.

✅ Spurs rural investment, supply chains, and skilled jobs.

Ontario’s energy landscape is undergoing a significant transformation as Premier Doug Ford makes a notable shift in his approach to wind power. This change represents a strategic pivot in the province’s energy policy, potentially altering the future of Ontario’s power generation, environmental goals, and economic prospects.

The Backdrop: Ford’s Initial Stance on Wind Power

When Doug Ford first assumed the role of Premier in 2018, his administration was marked by a strong stance against renewable energy projects, including wind power, with Ford later saying he was proud of tearing up contracts as part of this shift. Ford’s government inherited a legacy of ambitious renewable energy commitments from the previous Liberal administration under Kathleen Wynne, which had invested heavily in wind and solar energy. The Ford government, however, was critical of these initiatives, arguing that they resulted in high energy costs and a surplus of power that was not always needed.

In 2019, Ford’s government began rolling back several renewable energy projects, including wind farms, and was soon tested by the Cornwall wind farm ruling that scrutinized a cancellation. This move was driven by a promise to reduce electricity bills and cut what was perceived as wasteful spending on green energy. The cancellation of several wind projects led to frustration among environmental advocates and the renewable energy sector, who viewed the decision as a setback for Ontario’s climate goals.

The Shift: Embracing Wind Power

Fast forward to 2024, and Premier Ford’s administration is taking a markedly different approach. The recent policy shift, which moves to reintroduce renewable projects, indicates a newfound openness to wind power, reflecting a broader acknowledgment of the changing dynamics in energy needs and environmental priorities.

Several factors appear to have influenced this shift:

1. Rising Energy Demands and Climate Goals: Ontario’s growing energy demands, coupled with the pressing need to address climate change, have necessitated a reevaluation of the province’s energy strategy. As Canada commits to reducing greenhouse gas emissions and transitioning to cleaner energy sources, wind power is increasingly seen as a crucial component of this strategy. Ford’s change in direction aligns with these national and global goals.

2. Economic Considerations: The economic landscape has also evolved since Ford’s initial opposition to wind power. The cost of wind energy has decreased significantly over the past few years, making it a more competitive and viable option compared to traditional energy sources, as competitive wind power gains momentum in markets worldwide. Additionally, the wind energy sector promises substantial job creation and economic benefits, which are appealing in the context of post-pandemic recovery and economic growth.

3. Public Opinion and Pressure: Public opinion and advocacy groups have played a role in shaping policy. There has been a growing demand from Ontarians for more sustainable and environmentally friendly energy solutions. The Ford administration has been responsive to these concerns, recognizing the importance of addressing public and environmental pressures.

4. Technological Advancements: Advances in wind turbine technology have improved efficiency and reduced the impact on wildlife and local communities. Modern wind farms are less intrusive and more effective, addressing some of the concerns that were previously associated with wind power.

Implications of the Policy Shift

The implications of Ford’s shift towards wind power are far-reaching. Here are some key areas affected by this change:

1. Energy Portfolio Diversification: By reembracing wind power, Ontario will diversify its energy portfolio, reducing its reliance on fossil fuels and increasing the proportion of renewable energy in the mix. This shift will contribute to a more resilient and sustainable energy system.

2. Environmental Impact: Increased investment in wind power will contribute to Ontario’s efforts to combat climate change. Wind energy is a clean, renewable source that produces no greenhouse gas emissions during operation. This aligns with broader environmental goals and helps mitigate the impact of climate change.

3. Economic Growth and Job Creation: The wind power sector has the potential to drive significant economic growth and create jobs. Investments in wind farms and associated infrastructure can stimulate local economies, particularly in rural areas where many wind farms are located.

4. Energy Prices: While the initial shift away from wind power was partly motivated by concerns about high energy costs, including exposure to costly cancellation fees in some cases, the decreasing cost of wind energy could help stabilize or even lower electricity prices in the long term. As wind power becomes a larger component of Ontario’s energy supply, it could contribute to a more stable and affordable energy market.

Moving Forward: Challenges and Opportunities

Despite the positive aspects of this policy shift, there are challenges to consider, and other provinces have faced setbacks such as the Alberta wind farm scrapped by TransAlta that illustrate potential hurdles. Integrating wind power into the existing grid requires careful planning and investment in grid infrastructure. Additionally, addressing local concerns about wind farms, such as their impact on landscapes and wildlife, will be crucial to gaining broader acceptance.

Overall, Doug Ford’s shift towards wind power represents a significant and strategic change in Ontario’s energy policy. It reflects a broader understanding of the evolving energy landscape and the need for a sustainable and economically viable energy future. As the province navigates this new direction, the success of this policy will depend on effective implementation, ongoing stakeholder engagement, and a commitment to balancing environmental, economic, and social considerations, even as the electricity future debate continues among party leaders.

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EU Gas Price Cap Strategies aim to curb inflation during an energy crisis by capping wholesale gas and electricity generation costs, balancing supply and demand, mitigating subsidies, and safeguarding supply security amid Russia-Ukraine shocks.

Key Points

Temporary EU measures to cap gas and power prices, curb inflation, manage demand, and protect supply security.

✅ Flexible temporary price limits to secure gas supplies

✅ Framework cap on gas for electricity generation with demand checks

✅ Risk: subsidies, higher demand, and market distortions

The European Commission has outlined possible strategies to cap gas prices as the bloc faces a looming energy crisis this winter. 

Member states are divided over the emergency measures designed to pull down soaring inflation amid Russia's war in Ukraine. 

One proposal is a temporary "flexible" limit on gas prices to ensure that Europe can continue to secure enough gas, EU energy commissioner Kadri Simson said on Tuesday. 

Another option could be an EU-wide "framework" for a price cap on gas used to generate electricity, which would be combined with measures to ensure gas demand does not rise as a result, she said.

EU leaders are meeting on Friday to debate gas price cap strategies amid warnings that Europe's energy nightmare could worsen this winter.

Last week, France, Italy, Poland and 12 other EU countries urged the Commission to propose a broader price cap targeting all wholesale gas trade. 

But Germany -- Europe's biggest gas buyer -- and the Netherlands are among those opposing electricity market reforms within the bloc.

Russia has slashed gas deliveries to Europe since its February invasion of Ukraine, with Moscow blaming the cuts on Western sanctions imposed in response to the invasion, as the EU advances a plan to dump Russian energy across the bloc.

Since then, the EU has agreed on emergency laws to fill gas storage and windfall profit levies to raise money to help consumers with bills. 

Price cap critics
One energy analyst told Euronews that an energy price cap was an "unchartered territory" for the European Union. 

The EU's energy sector is largely liberalised and operates under the fundamental rules of supply and demand, making rolling back electricity prices complex in practice.

"My impression is that member states are looking at prices and quantities in isolation and that's difficult because of economics," said Elisabetta Cornago, a senior energy researcher at the Centre for European Reform.

"It's hard to picture such a level of market intervention This is uncharted territory."

The energy price cap would "quickly start costing billions" because it would force governments to continually subsidise the difference between the real market price and the artificially capped price, another expert said. 

"If you are successful and prices are low and you still get gas, consumers will increase their demand: low price means high demand. Especially now that winter is coming," said Bram Claeys, a senior advisor at the Regulatory Assistance Project. 

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Quebec Ice Storm 2025 disrupted power across Laurentians and Lanaudiere as freezing rain downed lines; Hydro-QuE9bec crews accelerated grid restoration, emergency response, and infrastructure resilience amid ongoing outages and severe weather alerts.

Key Points

Quebec Ice Storm 2025 brought freezing rain, outages, and grid damage, hitting Laurentians and Lanaudiere hardest.

✅ Peak: 62,000 Hydro-QuE9bec customers without electricity

✅ Most outages in Laurentians and Lanaudiere regions

✅ Crews repairing lines; restoration updates ongoing

A significant weather event struck Quebec in late March 2025, as a powerful ice storm caused widespread power outages across the province. The storm led to extensive power outages, affecting tens of thousands of residents, particularly in the Lanaudière and Laurentians regions. ​

Impact on Power Infrastructure

The freezing rain accumulated on power lines and vegetation, leading to numerous power outages across the network. Hydro-Québec reported that at its peak, over 62,000 customers were without electricity, with the majority of outages concentrated in the Laurentians and Lanaudière regions. By the afternoon, the number decreased to approximately 30,000, and further to just under 18,500 by late afternoon. 

Comparison with Previous Storms

While the March 2025 ice storm caused significant disruptions, it was less severe compared to the catastrophic ice storm of April 2023, which left 1.1 million Hydro-Québec customers without power. Nonetheless, the 2025 storm's impact was considerable, leading to the closure of municipal facilities and posing challenges for local economies, a pattern echoed when Toronto outages persisted for hundreds after a spring storm.

Ongoing Challenges

As of April 1, 2025, some areas continued to experience power outages, and incidents such as a manhole fire left thousands without service in separate cases. Hydro-Québec and municipal authorities worked diligently to restore services and address the aftermath of the storm, while Hydro One crews restored power to more than 277,000 customers after damaging storms in Ontario. Residents were advised to stay updated through official channels for restoration timelines and safety information.

Future Preparedness

The recurrence of such severe weather events highlights the importance of robust infrastructure and emergency preparedness, as seen in BC Hydro's storm response to an 'atypical' event that demanded extensive coordination. Both utility companies and residents must remain vigilant, especially during seasons prone to unpredictable weather patterns, with local utilities like Sudbury Hydro crews working to reconnect service after regional storms.

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