AEP wants to ask customers to chip in

By The Roanoke Times


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Appalachian Power Co. (AEP) customers may soon be able to write a larger check for the monthly bill to support the generation of electricity with wind, water and other renewable sources.

The utility said the minimum investment will be $1.50 a month. A typical residential customer could elect to fully offset his electrical consumption with green energy by paying about $15 monthly.

The voluntary program, if approved by state regulators, will be open to nonresidential customers, too.

The company applied July 1 for permission to start in September. But the Virginia State Corporation Commission is taking additional time to evaluate public comments, those of its staff and any rebuttal by the company. A staff report is due Oct. 15.

The SCC is also gathering reaction to proposed increases in electrical bills, arising from three rate-increase filings. The proposals, if approved, could mean that by early next year, the typical electrical bill for a modest home could rise from about $70 to $100 a month.

Appalachian said the portion of its electricity derived from renewable sources is 2 percent. Those sources are water and wind as opposed to primarily coal.

The proposed new program, called a Renewable Power Rider, will encourage the utility to go higher, spokesman John Shepelwich said.

"It pushes us," said Shepelwich, who explained the goal is 12 percent by about 2020.

Here's how that push will work: In one of its renewable-power strategies, Appalachian buys electricity from the municipally owned Summersville Dam Hydroelectric Project in West Virginia.

In addition to receiving the energy, the company receives renewable energy credits. If Appalachian becomes subject to mandatory renewable energy standards, it would comply by handing over the credits. Or, it might sell the credits to another utility that needs some. For now, it is hanging onto them.

Under the Renewable Power Rider program, Appalachian will empower Virginia consumers to cancel some of those credits with additional, voluntary payments included in bills.

That, in turn, theoretically leaves the company in need of more credits. Purchases of more renewable energy are the expected result.

"The company recognizes that there is a growing interest in the development of renewable energy resources," the company wrote to regulators.

"It would like to provide its customers the opportunity to support voluntarily the development of renewable resources in a simple, reasonable and prudent manner through their monthly bills."

The caveat is, the company doesn't want to risk all of its Summersville credits.

So it is placing only 10 percent up for cancellation or retirement. If 1 percent of customers participate in the program, the program could hit its target and the utility intends to close it to new participants.

It wants to hang onto the other 90 percent in case they become saleable for an attractive price or essential to meet a government renewable energy mandate.

But this is the first go-around for the program, and the parameters could be changed, Shepelwich said.

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IEA: Electricity investment surpasses oil and gas for the first time

Electricity Investment Surpasses Oil and Gas 2016, driven by renewable energy, power grids, and energy efficiency, as IEA reports lower oil and gas spending, rising solar and wind capacity, and declining coal power plant approvals.

 

Key Points

A 2016 milestone where electricity topped global energy investment, led by renewables, grids, and efficiency, per the IEA.

✅ IEA: electricity investment hit $718b; oil and gas fell to $650b.

✅ Renewables led with $297b; solar and wind unit costs declined.

✅ Coal plant approvals plunged; networks and storage spending rose.

 

Investments in electricity surpassed those in oil and gas for the first time ever in 2016 on a spending splurge on renewable energy and power grids as the fall in crude prices led to deep cuts, the International Energy Agency (IEA) said.

Total energy investment fell for the second straight year by 12 per cent to US$1.7 trillion compared with 2015, the IEA said. Oil and gas investments plunged 26 per cent to US$650 billion, down by over a quarter in 2016, and electricity generation slipped 5 per cent.

"This decline (in energy investment) is attributed to two reasons," IEA chief economist Laszlo Varro told journalists.

"The reaction of the oil and gas industry to the prolonged period of low oil prices which was a period of harsh investment cuts; and technological progress which is reducing investment costs in both renewable power and in oil and gas," he said.

Oil and gas investment is expected to rebound modestly by 3 per cent in 2017, driven by a 53 per cent upswing in U.S. shale, and spending in Russia and the Middle East, the IEA said in a report.

"The rapid ramp up of U.S. shale activities has triggered an increase of U.S. shale costs of 16 per cent in 2017 after having almost halved from 2014-16," the report said.

The global electricity sector, however, was the largest recipient of energy investment in 2016 for the first time ever, overtaking oil, gas and coal combined, the report said.

"Robust investments in renewable energy and increased spending in electricity networks, which supports the outlook that low-emissions sources will cover most demand growth, made electricity the biggest area of capital investments," Varro said.

Electricity investment worldwide was US$718 billion, lifted by higher spending in power grids which offset the fall in power generation investments.

"Investment in new renewables-based power capacity, at US$297 billion, remained the largest area of electricity spending, despite falling back by 3 per cent as clean energy investment in developing nations slipped, the report said."

Although renewables investments was 3 per cent lower than five years ago, capacity additions were 50 per cent higher and expected output from this capacity about 35 per cent higher, thanks to the fall in unit costs and technology improvements in solar PV and wind generation, the IEA said.

 

COAL INVESTMENT IS COMING TO AN END

Investments in coal-fired electricity plants fell sharply. Sanctioning of new coal power plants fell to the lowest level in nearly 15 years, reflecting concerns about local air pollution, and emergence of overcapacity and competition from renewables, with renewables poised to eclipse coal in global power generation, notably in China. Coal investments, however, grew in India.

"Coal investment is coming to an end. At the very least, it is coming to a pause," Varro said.

The IEA report said energy efficiency investments continued to expand in 2016, reaching US$231 billion, with most of it going to the building sector globally.

Electric vehicles sales rose 38 per cent in 2016 to 750,000 vehicles at $6 billion, and represented 10 per cent of all transport efficiency spending. Some US$6 billion was spent globally on electronic vehicle charging stations, the IEA said.

Spending on electricity networks and storage continued the steady rise of the past five years, as surging electricity demand puts power systems under strain, reaching an all-time high of US$277 billion in 2016, with 30 per cent of the expansion driven by China’s spending in its distribution system, the report said.

China led the world in energy investments with 21 per cent of global total share, the report said, driven by low-carbon electricity supply and networks projects.

Although oil and gas investments fell in the United States in 2016, its total energy investments rose 16 per cent, even as Americans use less electricity in recent years, on the back of spending in renewables projects, the IEA report said.

 

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America’s Electricity is Safe From the Coronavirus—for Now

US Grid Pandemic Response coordinates control rooms, grid operators, and critical infrastructure, leveraging hydroelectric plants, backup control centers, mutual assistance networks, and deep cleaning protocols to maintain reliability amid reduced demand and COVID-19 risks.

 

Key Points

US Grid Pandemic Response encompasses measures by utilities and operators to safeguard power reliability during COVID-19

✅ Control rooms staffed on-site; operators split across backup centers

✅ Health screenings, deep cleaning, and isolation protocols mitigate contagion

✅ Reduced demand and mutual assistance improve grid resilience

 

Control rooms are the brains of NYPA’s power plants, which are mostly hydroelectric and supply about a quarter of all the electricity in New York state. They’re also a bit like human petri dishes. The control rooms are small, covered with frequently touched switches and surfaces, and occupied for hours on end by a half-dozen employees. Since social distancing and telecommuting isn’t an option in this context, NYPA has instituted regular health screenings and deep cleanings to keep the coronavirus out.

The problem is that each power plant relies on only a handful of control room operators. Since they have a specialized skill set, they can’t be easily replaced if they get sick. “They are very, very critical,” says Gil Quiniones, NYPA president and CEO. If the pandemic worsens, Quiniones says that NYPA may require control room operators to live on-site at power plants to reduce the chance of the virus making it in from the outside world. It sounds drastic, but Quiniones says NYPA has done it before during emergencies—once during the massive 2003 blackout, and again during Hurricane Sandy.

Meanwhile, PJM is one of North America’s nine regional grid operators and manages the transmission lines that move electricity from power plants to millions of customers in 13 states on the Eastern seaboard, including Washington, DC. PJM has had a pandemic response plan on the books for 15 years, but Mike Bryson, senior vice president of operations, says that this is the first time it’s gone into full effect. As of last week, about 80 percent of PJM’s 750 full-time employees have been working from home. But PJM also requires a skeleton crew of essential workers to be on-site at all times in its control centers. As part of its emergency planning, PJM built a backup control center years ago, and now it is splitting control center operators between the two to limit contact.

Past experience with large-scale disasters has helped the energy sector keep the lights on and ventilators running during the pandemic. Energy is one of 16 sectors that the US government has designated as “critical infrastructure,” which also includes the communications industry, transportation sector, and food and water systems. Each is seen as vital to the country and therefore has a duty to maintain operations during national emergencies.

“We need to be treated as first responders,” says Scott Aaronson, the vice president of security and preparedness at the Edison Electric Institute, a trade group representing private utilities. “Everybody's goal right now is to keep the public healthy, and to keep society functioning as best we can. A lack of electricity will certainly create a challenge for those goals.”

America’s electricity grid is a patchwork of regional grid operators connecting private and state-owned utilities. This means simply figuring out who’s in charge and coordinating among the various organizations is one of the biggest challenges to keeping the electricity flowing during a national emergency, according to Aaronson.

Generally, a lot of this responsibility falls on formal energy organizations like the nonprofit North American Electric Reliability Corporation and the Federal Energy Regulatory Commission. But during the coronavirus outbreak, an obscure organization run by the CEOs of electric utilities called the Electricity Subsector Coordinating Council has also served as a primary liaison between the federal government and the thousands of utility companies around the US. Aaronson says the organization has been meeting twice a week for the past three weeks to ensure that utilities are implementing best practices in their response to the coronavirus, as well as to inform the government of material needs to keep the energy sector running smoothly.

This tight-knit coordination will be especially important if the pandemic gets worse, as many forecasts suggest it will. Most utilities belong to at least one mutual assistance group, an informal network of electricity suppliers that help each other out during a catastrophe. These mutual assistance networks are usually called upon following major storms that threaten prolonged outages. But they could, in principle, be used to help during the coronavirus pandemic too. For example, if a utility finds itself without enough operators to manage a power plant, it could conceivably borrow trained operators from another company to make sure the power plant stays online.

So far, utilities and grid operators have managed to make it work on their own. There have been a handful of coronavirus cases reported at power plants, but they haven’t yet affected these plants’ ability to deliver energy. The challenges of running a power plant with a skeleton crew is partially offset by the reduced power demand as businesses shut down and more people work from home, says Robert Hebner, the director of the Center for Electromechanics at the University of Texas. “The reduced demand for power gives utilities a little breathing room,” says Hebner.

A recent study by the University of Chicago’s Energy Policy Institute found that electricity demand in Italy has plunged by 18 percent following the severe increase in coronavirus cases in the country. Energy demand in China also plummeted as a result of the pandemic. Bryson, at PJM, says the grid operator has seen about a 6 percent decrease in electricity demand in recent weeks, but expects an even greater drop if the pandemic gets worse.

Generally speaking, problems delivering electricity in the US occur when the grid is overloaded or physically damaged, such as during California wildfires or a hurricane.

An open question among coronavirus researchers is whether there will be a second wave of the pandemic later this year. During the Spanish flu pandemic in the early 20th century, the second wave turned out to be deadlier than the first. If the coronavirus remerges later this year, it could be a serious threat to reliable electricity in the US, says John MacWilliams, a former associate deputy secretary of the Department of Energy and a senior fellow at Columbia University’s Center on Global Energy Policy.

“If this crisis extends into the fall, we're going to hit hurricane season along the coasts,” MacWilliams says. “Utilities are doing a very good job right now, but if we get unlucky and have an active hurricane season, they're going to get very stressed because the number of workers that are available to repair damage and restore power will become more limited.”

This was a sentiment echoed by Bryson at PJM. “Any one disaster is manageable, but when you start layering them on top of each other, it gets much more challenging,” he adds. The US electricity grid struggles to handle major storms as it is, and these challenges will be heightened if too many workers are home sick. In this sense, the energy sector’s ability to deliver the electricity needed to keep manufacturing medical supplies or keep ventilators running depends to a large extent on our ability to flatten the curve today. The coronavirus is bad enough without having to worry about the lights going out.

 

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California Utility Cuts Power to Massive Areas in Northern, Central California

PG&E Public Safety Power Shutoff curbs wildfire risk amid high winds, triggering California outages across Northern California and Bay Area counties; grid safety measures, outage maps, campus closures, and restoration timelines guide residents and businesses.

 

Key Points

A preemptive outage program by PG&E to reduce wildfire ignition during extreme wind events in California.

✅ Cuts power during red flag, high wind, dry fuel conditions

✅ Targets Northern California, Bay Area counties at highest risk

✅ Restoration follows inspections, weather all-clear, hazard checks

 

California utility Pacific Gas and Electric Co. (PG&E) has cut off power supply to hundreds of thousands of residents in Northern and Central California as a precaution to possible breakout of wildfires, a move examined in reasons for shutdowns by industry observers.

PG&E confirmed that about 513,000 customers in many counties in Northern California, including Napa, Sierra, Sonoma and Yuba, were affected in the first phase of Public Safety Power Shutoff, a preemptive measure it took to prevent wildfires believed likely to be triggered by strong, dry winds.

The utility said the decision to shut off power was, amid ongoing debate over nuclear's status in California, "based on forecasts of dry, hot and windy weather including potential fire risk."

"This weather event will last through midday Thursday, with peak winds forecast from Wednesday morning through Thursday morning and reaching 60 mph (about 96 km per hour) to 70 mph (about 112 km per hour) at higher elevations," it said, while abroad National Grid warnings about short supply have highlighted parallel reliability concerns.

PG&E noted that about 234,000 residents in mostly counties of San Francisco Bay Area such as Alameda, Alpine, Contra Costa, San Mateo and Santa Clara were impacted in the second phase of the power shutoff, as the state considers power plant closure delays with potential grid impacts, that began around noon in Wednesday.

The unprecedented power outages sweeping across Northern California has darkened homes and forced schools and business to close, even as the UK paused an emergency energy plan amid its own supply concerns.

University of California, Berkeley canceled all classes for Wednesday due to expected campus power loss over the next few days.

The university said it has received notice from PG&E, as China's power woes cloud U.S. solar supplies that could aid resilience, that "most of the core campus will be without power" possibly for 48 hours.

A freshman at California State University San Jose told Xinhua that their classes were canceled Wednesday as the campus was running out of power.

"I had to go home because even our dormitory went without electricity," the student added.

However, PG&E noted in an updated statement Wednesday night that only 4,000 customers would be affected in the third phase being considered for Kern County in Central California, compared to an earlier forecast of 43,000 people who would experience power outage.

The PG&E power shutoff was the largest preemptive measure ever taken to prevent wildfires in the state's history, and it comes as clean power grows while fossil declines across California's grid, highlighting broader transition challenges.

The San Francisco-based California utility was held responsible for poor management of its power lines that sparked fatal wildfires in Northern California and killed 86 people last year in what was called Camp Fire, the single-deadliest wildfire in California's history.

Several lawsuits and other requests for compensation from wildfire victims that amounted to billions of U.S. dollars forced the embattled the company to claim bankruptcy protection early this year.

 

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Electricity Shut-Offs in a Pandemic: How COVID-19 Leads to Energy Insecurity, Burdensome Bills

COVID-19 Energy Burden drives higher electricity bills as income falls, intensifying energy poverty, utility shut-offs, and affordability risks for low-income households; policy moratoriums, bill relief, and efficiency upgrades are vital responses.

 

Key Points

The COVID-19 energy burden is the rising share of income spent on energy as bills increase and earnings decline.

✅ Rising home demand and lost wages increase energy cost share.

✅ Mandated shut-off moratoriums and reconnections protect health.

✅ Fund assistance, efficiency, and solar for LMI households.

 

I have asthma. It’s a private piece of medical information that I don’t normally share with people, but it makes the potential risks associated with exposure to the coronavirus all the more dangerous for me. But I’m not alone. 107 million people in the U.S. have pre-existing medical conditions like asthma and heart disease; the same pre-existing conditions that elevate their risk of facing a life-threatening situation were we to contract COVID-19. There are, however, tens of millions more house-bound Americans with a condition that is likely to be exacerbated by COVID-19: The energy burden.

The energy burden is a different kind of pre-existing condition:
In the last four weeks, 22 million people filed for unemployment. Millions of people will not have steady income (or the healthcare tied to it) to pay rent and utility bills for the foreseeable future which means that thousands, possibly millions of home-bound Americans will struggle to pay for energy.

Your energy burden is the amount of your monthly income that goes to paying for energy, like your monthly electric bill. So, when household energy use increases or income decreases, your energy burden rises. The energy burden is not a symptom of the pandemic and the economic downturn; it is more like a pre-existing condition for many Americans.

Before the coronavirus outbreak, I shared a few maps that showed how expensive electricity is for some. The energy burden in most pronounced in places already struggling economically, like in Appalachia, where residents in some counties must put more than 30 percent of their income toward their electric bills, and in the Midwest where states such as Michigan have some families spending more than 1/5 of their income on energy bills. The tragic facts are that US families living below the poverty line are far more likely to also be suffering from their energy burden.

But like other pre-existing conditions, the impacts of the coronavirus pandemic are exacerbating the underlying problems afflicting communities across the country.

Critical responses to minimize the spread of COVID-19 are social distancing, washing hands frequently, covering our faces with masks and staying at home. More time at home for most will drive up energy bills, and not by a little. Estimates on how much electricity demand during COVID-19 will increase vary but I’ve seen estimates as high as a 20% increase on average. For some families that’s a bag of groceries or a refill on prescription medication.

What happens when the power gets turned off?
Under normal conditions, if you cannot pay your electric bill your electricity can get turned off. This can have devastating consequences. Most states have protections for health and medical reasons and some states have protections during extreme heat or cold weather. But enforcement of those protections can vary by utility service area and place unnecessary burdens on the customer.

UCS
Only Florida has no protections of any kind against utility shut-offs when health or medical reasons would merit protection against it. However, when it comes to protection against extreme heat, only a few states have mandatory protections based on temperature thresholds.

The NAACP has also pointed out that utilities have unceremoniously disconnected the power of millions of people, disproportionally African-American and Latinx households.

April tends to be a mild month for most of the country, but the South already had its first heat wave at the end of March. If this pandemic lasts into the summer, utility disconnects could become deadly, and efforts to prevent summer power outages will be even more critical to public health. In the summer, during extreme summer heat families can’t turn off the A/C and go to the movies if we are following public health measures and sheltering in place. Lots of families that don’t have or can’t afford to run A/C would otherwise gather at local community pools, beaches, or in cooling centers, but with parks, pools and community groups closed to prevent the virus’s spread, what will happen to these families in July or August?

But we won’t have to wait till the summer to see how families will be hard hit by falling behind on bills and losing power. Here are a few ways electricity disconnection policies cause people harm during the pandemic:

Loss of electricity during the COVID-19 pandemic means families will lose their ability to refrigerate essential food supplies.
Child abuse guidance discusses how unsanitary household conditions are a contributing factor to child protective services involvement. Unsanitary household conditions can include, for example, rotting food (which might happen if electricity is cut off).

HUD’s handbook on federally subsidized housing includes a chapter on termination, which says that lease agreements can be terminated for repeated minor infractions including failing to pay utilities.
Airway machines used to treat respiratory ailments—pre-existing conditions in this pandemic—will not work. Our elderly neighbors in particular might rely on medicine that requires refrigeration or medical equipment that requires electricity. They too have fallen victim to utility shut-offs even during the pandemic.

Empowering solutions are available today

Decisionmakers seeking solutions can look to implement utility shut off moratoriums as a good start. Good news is that many utilities have voluntarily taken action to that effect, and New Jersey and New York have suspended shut-offs, one of the best trackers on who is taking what action has been assembled by Energy Policy Institute.

But voluntary actions do not always provide comprehensive protection, and they certainly have not been universally adopted across the country. Some utilities are waiving fees as relief measures, and some moratoriums only apply to customers directly affected by COVID-19, which will place additional onerous red tape on households that are stricken and perhaps unable to access testing. Others might only be an extension of standard medical shut off protections. Moratoriums put in place by voluntary action can also be revoked or lifted by voluntary action, which does not provide any sense of certainty to people struggling to make ends meet.

This is why the US needs mandatory moratoriums on all utility disconnections. These normally would be rendered at the state level, either by a regulatory commission, legislative act, or even an emergency executive order. But the inconsistent leadership among states in response to the COVID-19 crisis suggests that Congressional action is needed to ensure that all vulnerable utility customers are protected. That’s exactly what a coalition of organizations, including UCS, is calling for in future federal aid legislation. UCS has called for a national moratorium on utility shut-offs.

And let’s be clear, preventing new shut-offs isn’t enough. Cutting power off at residence during a pandemic is not good public policy. People who are without electricity should have it restored so residents can safely shelter in place and help flatten the curve. So far, only Colorado and Wisconsin’s leadership has taken this option.

Addressing the root causes of energy poverty
Preventing shut-offs is a good first step, but the increased bill charges will nevertheless place greater economic pressure on an incalculable number of families. Addressing the root of the problem (energy affordability) must be prioritized when we begin to recover from the health and economic ramifications of the COVID-19 pandemic.

One way policymakers can do that is to forgive outstanding balances on utility bills, perhaps with an eligibility cap based on income. Additional funds could be made available to those who are still struggling to pay their bills via capping bills, waiving late payment fees, automating payment plans or other protective measures that rightfully place consumers (particularly vulnerable consumers) at the center of any energy-related COVID-19 response. Low-and-moderate-income energy efficiency and solar programs should be funded as much as practically possible.

New infrastructure, particularly new construction that is slated for public housing, subsidized housing, or housing specifically marketed for low- and moderate-income families, should include smart thermostats, better insulation, and energy-efficient appliances.

Implementing these solutions may seem daunting, let us not forget that one of the best ways to ease people’s energy burden is to keep a utility’s overall energy costs low. That means state utility commissions must be vigilant in utility rate cases and fuel recovery cost dockets to protect people facing unfathomable economic pressures. Unscrupulous utilities have been known to hide unnecessary costs in our energy bills. Commissions and their staff are overwhelmed at this time, but they should be applying extra scrutiny during proceedings when utilities are recovering costs associated with delivering energy.

What might a utility try to get past the commission?
Well, residential demand is up, so for many people, bills will increase. However, wholesale electricity rates are low right now, in some cases at all-time lows. Why? Because industrial and commercial demand reductions (from social distancing at home) have more than offset residential demand increases. Overall US electricity demand is flat or declining, and supply/demand economics predicts that when demand decreases, prices decrease.

At the same time, natural gas prices have set record lows each month of this year and that’s a trend that is expected to hold true for a while.

Low demand plus low gas prices mean wholesale market prices are incredibly low. Utilities should be taking advantage of low market prices to ensure that they deliver electricity to customers at as low a cost as possible. Utilities must also NOT over-run coal plants uneconomically or lean on aging capacity despite disruptions in coal and nuclear that can invite brownouts because that will not only needlessly cost customers more, but it will also increase air pollution which will exacerbate respiratory issues and susceptibility to COVID-19, according to a recent study published by Harvard.

 

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Brand New Renewable Technology Harnesses Electricity From The Cold, Dark Night

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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Balancing Act: Germany's Power Sector Navigates Energy Transition

Germany January Power Mix shows gas-fired generation rising, coal steady, and nuclear phaseout impacts, amid cold weather, energy prices, industrial demand, and emissions targets shaping renewables, grid stability, and security of supply.

 

Key Points

The January electricity mix, highlighting gas, coal, renewables, and nuclear exit effects on emissions, prices, and demand.

✅ Gas output up 13% to 8.74 TWh, share at 18.6%.

✅ Coal share 23%, down year on year, steady vs late 2023.

✅ Nuclear gap filled by gas and coal; emissions below Jan 2023.

 

Germany's electricity generation in January presented a fascinating snapshot of its energy transition journey. As the country strives to move away from fossil fuels, with renewables overtaking coal and nuclear in its power mix, it grapples with the realities of replacing nuclear power and meeting fluctuating energy demands.

Gas Takes the Lead:

Gas-fired power plants saw their highest output in two years, generating 8.74 terawatt hours (TWh). This 13% increase compared to January 2023 compensated for the closure of nuclear reactors, which were extended during the energy crisis to shore up supply, and colder weather driving up heating needs. This reliance on gas, however, pushed its share in the electricity mix to 18.6%, highlighting Germany's continued dependence on fossil fuels.

Coal Fades, but Not Forgotten:

While gas surged, coal-fired generation remained below previous levels, dropping 29% from January 2023. However, it stayed relatively flat compared to late 2023, suggesting utilities haven't entirely eliminated it. Coal still held a 23% share, and periodic coal reliance remains evident, exceeding gas' contribution, reflecting its role as a reliable backup for intermittent renewable sources like wind.

Nuclear Void and its Fallout:

The shutdown of nuclear plants in April 2023 created a significant gap, previously accounting for an average of 12% of annual electricity output. This loss is being compensated through gas and coal, with gas currently the preferred choice, even as a nuclear option debate persists among policymakers. This strategy kept January's power sector emissions lower than the previous year, but rising demand could shift the balance.

Industry's Uncertain Impact:

Germany's industrial sector, a major energy consumer, is facing challenges like high energy prices and weak consumer demand. While the government aims to foster industrial recovery, uncertainties linger due to a shaky coalition and limited budget, and debate about a possible nuclear resurgence continues in parallel, which could reshape policy. Any future industrial revival would likely increase energy demand and potentially necessitate more gas or coal.

Cost-Driven Choices and Emission Concerns:

The choice between gas and coal depends on their relative costs, in a system pursuing a coal and nuclear phase-out under long-term policy. Currently, gas seems more favorable emission-wise, but if its price rises, coal might become more attractive, impacting overall emissions.

Looking Ahead:

Germany's energy transition faces a complex balancing act, with persistent grid expansion woes and exposure to cheap gas complicating progress. While the reliance on gas and coal highlights the difficulties in replacing nuclear, the focus on emissions reduction is encouraging. Navigating the challenges of affordability, industrial needs, and climate goals will be crucial for a successful transition to a clean and secure energy future.

 

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