Power lines needed to prevent blackouts

Bitcoin Energy Consumption drives debate on blockchain mining, proof-of-work, carbon footprint, and emissions, with CCAF estimates in terawatt hours highlighting electricity demand, fossil fuel reliance, and sustainability concerns for data centers and cryptocurrency networks.

Key Points

Electricity used by Bitcoin proof-of-work mining, often fossil-fueled, estimated by CCAF in terawatt hours.

✅ CCAF: 40-445 TWh, central estimate ~130 TWh

✅ ~66% of mining electricity sourced from fossil fuels

✅ Proof-of-work increases hash rate, energy, and emissions

The University of Cambridge Centre for Alternative Finance (CCAF) studies the burgeoning business of cryptocurrencies.

It calculates that Bitcoin's total energy consumption is somewhere between 40 and 445 annualised terawatt hours (TWh), with a central estimate of about 130 terawatt hours.

The UK's electricity consumption is a little over 300 TWh a year, while Argentina uses around the same amount of power as the CCAF's best guess for Bitcoin, as countries like New Zealand's electricity future are debated to balance demand.

And the electricity the Bitcoin miners use overwhelmingly comes from polluting sources, with the U.S. grid not 100% renewable underscoring broader energy mix challenges worldwide.

The CCAF team surveys the people who manage the Bitcoin network around the world on their energy use and found that about two-thirds of it is from fossil fuels, and some regions are weighing curbs like Russia's proposed mining ban amid electricity deficits.

Huge computing power - and therefore energy use - is built into the way the blockchain technology that underpins the cryptocurrency has been designed.

It relies on a vast decentralised network of computers.

These are the so-called Bitcoin "miners" who enable new Bitcoins to be created, but also independently verify and record every transaction made in the currency.

In fact, the Bitcoins are the reward miners get for maintaining this record accurately.

It works like a lottery that runs every 10 minutes, explains Gina Pieters, an economics professor at the University of Chicago and a research fellow with the CCAF team.

Data processing centres around the world, including hotspots such as Iceland's mining strain, race to compile and submit this record of transactions in a way that is acceptable to the system.

They also have to guess a random number.

The first to submit the record and the correct number wins the prize - this becomes the next block in the blockchain.

Estimates for bitcoin's electricity consumption
At the moment, they are rewarded with six-and-a-quarter Bitcoins, valued at about $50,000 each.

As soon as one lottery is over, a new number is generated, and the whole process starts again.

The higher the price, says Prof Pieters, the more miners want to get into the game, and utilities like BC Hydro suspending new crypto connections highlight grid pressures.

"They want to get that revenue," she tells me, "and that's what's going to encourage them to introduce more and more powerful machines in order to guess this random number, and therefore you will see an increase in energy consumption," she says.

And there is another factor that drives Bitcoin's increasing energy consumption.

The software ensures it always takes 10 minutes for the puzzle to be solved, so if the number of miners is increasing, the puzzle gets harder and the more computing power needs to be thrown at it.

Bitcoin is therefore actually designed to encourage increased computing effort.

The idea is that the more computers that compete to maintain the blockchain, the safer it becomes, because anyone who might want to try and undermine the currency must control and operate at least as much computing power as the rest of the miners put together.

What this means is that, as Bitcoin gets more valuable, the computing effort expended on creating and maintaining it - and therefore the energy consumed - inevitably increases.

We can track how much effort miners are making to create the currency.

They are currently reckoned to be making 160 quintillion calculations every second - that's 160,000,000,000,000,000,000, in case you were wondering.

And this vast computational effort is the cryptocurrency's Achilles heel, says Alex de Vries, the founder of the Digiconomist website and an expert on Bitcoin.

All the millions of trillions of calculations it takes to keep the system running aren't really doing any useful work.

"They're computations that serve no other purpose," says de Vries, "they're just immediately discarded again. Right now we're using a whole lot of energy to produce those calculations, but also the majority of that is sourced from fossil energy, and clean energy's 'dirty secret' complicates substitution."

The vast effort it requires also makes Bitcoin inherently difficult to scale, he argues.

"If Bitcoin were to be adopted as a global reserve currency," he speculates, "the Bitcoin price will probably be in the millions, and those miners will have more money than the entire [US] Federal budget to spend on electricity."

"We'd have to double our global energy production," he says with a laugh, even as some argue cheap abundant electricity is getting closer to reality today. "For Bitcoin."

He says it also limits the number of transactions the system can process to about five per second.

This doesn't make for a useful currency, he argues.

Rising price of bitcoin graphic
And that view is echoed by many eminent figures in finance and economics.

The two essential features of a successful currency are that it is an effective form of exchange and a stable store of value, says Ken Rogoff, a professor of economics at Harvard University in Cambridge, Massachusetts, and a former chief economist at the International Monetary Fund (IMF).

He says Bitcoin is neither.

"The fact is, it's not really used much in the legal economy now. Yes, one rich person sells it to another, but that's not a final use. And without that it really doesn't have a long-term future."

What he is saying is that Bitcoin exists almost exclusively as a vehicle for speculation.

So, I want to know: is the bubble about to burst?

"That's my guess," says Prof Rogoff and pauses.

"But I really couldn't tell you when."

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Urban Piezoelectric Energy Textiles capture wind-driven motion on tunnels, bridges, and facades, enabling renewable microgeneration for smart cities with decentralized power, resilient infrastructure, and flexible lamellae sheets that harvest airflow vibrations.

Key Points

Flexible piezoelectric sheets that convert urban wind and vibration into electricity on tunnels, bridges, and facades.

✅ Installed on London Crossrail to test airflow energy capture

✅ Flexible lamellae panels retrofit tunnels, bridges, facades

✅ Supports decentralized, resilient urban microgrids

Charlotte Slingsby and her startup Moya Power are researching piezo-electric textiles that gain energy from movement, similar to advances like a carbon nanotube energy harvester being explored by materials researchers. It seems logical that Slingsby originally came from a city with a reputation for being windy: “In Cape Town, wind is an energy source that you cannot ignore,” says the 27-year-old, who now lives in London.

Thanks to her home city, she also knows about power failures. That’s why she came up with the idea of not only harnessing wind as an alternative energy source by setting up wind farms in the countryside or at sea, but also for capturing it in cities using existing infrastructure.

The problem

The United Nations estimates that by 2050, two thirds of the world’s population will live in cities. As a result, the demand for energy in urban areas will increase dramatically, spurring interest in nighttime renewable technology that can operate when solar and wind are variable. Can the old infrastructure grow fast enough to meet demand? How might we decentralise power generation, moving it closer to the residents who need it?

For a pilot project, she has already installed grids of lamellae-covered plastic sheets in tunnels on London Crossrail routes; the draft in the tube causes the protrusions to flutter, which then generates electricity.

“If we all live in cities that need electricity, we need to look for new, creative ways to generate it, including nighttime solar cells that harvest radiative cooling,” says Slingsby, who studied design and engineering at Imperial College and the Royal College of Art. “I wanted to create something that works in different situations and that can be flexibly adapted, whether you live in an urban hut or a high-rise.”

The yield is low compared to traditional wind power plants and is not able to power whole cities, but Slingsby sees Moya Power as just a single element in a mixture of urban energy sources, alongside approaches like gravity power that aid grid decarbonization.

In the future, Slingsby’s invention could hang on skyscrapers, in tunnels or on bridges – capturing power in the windiest parts of the city, alongside emerging air-powered generators that draw energy from humidity. The grey concrete of tunnels and urban railway cuttings could become our cities’ most visually appealing surfaces...

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TagEnergy France Battery Storage Platform enables grid flexibility, stability, and resilience across France, storing wind and solar power, balancing supply and demand, reducing curtailment, and supporting carbon neutrality with fast-response, utility-scale capacity.

Key Points

A utility-scale BESS in France that stores renewable energy to stabilize the grid, boost flexibility, and cut emissions.

✅ Several hundred MW utility-scale capacity for peak shaving.

✅ Fast-response frequency regulation and voltage support.

✅ Reduces fossil peaker use and renewable curtailment.

In a significant leap toward enhancing France’s renewable energy infrastructure, TagEnergy has officially launched the country's largest battery storage platform. This cutting-edge project is set to revolutionize the way France manages its electricity grid by providing much-needed flexibility, stability, and resilience, particularly as the country ramps up its use of renewable energy sources and experiences negative prices in France during periods of oversupply,

The new battery storage platform, with a total capacity of several hundred megawatts, will play a crucial role in facilitating the country's transition to a greener, more sustainable energy future. It marks a significant step forward in addressing one of the most pressing challenges of renewable energy: how to store and dispatch power generated from intermittent sources such as wind and solar energy.

The Role of Battery Storage in Renewable Energy

Battery storage systems are key to unlocking the full potential of renewable energy sources. While wind and solar power are increasingly important in reducing reliance on fossil fuels, their intermittent nature—dependent on weather conditions and time of day—presents a challenge for grid operators. Without an efficient way to store surplus energy produced during peak generation periods, when negative electricity prices can emerge, the grid can become unstable, leading to waste or even blackouts.

This is where TagEnergy’s new platform comes into play. The state-of-the-art battery storage system will capture excess energy when production is high, and then release it back into the grid during periods of high demand, supporting peak demand strategies or when renewable generation dips. This capability will smooth out the fluctuations in renewable energy production and ensure a constant, reliable supply of power to consumers. By doing so, the platform will not only stabilize the grid but also increase the overall efficiency and utilization of renewable energy sources.

The Scale and Scope of the Platform

TagEnergy's battery storage platform is one of the largest in France, with a capacity capable of supporting a wide range of energy storage needs across the country. The platform’s size is designed to handle significant energy loads, making it a critical piece of infrastructure for grid stability. The project will primarily focus on large-scale energy storage, but it will also incorporate cutting-edge technologies to ensure fast response times and high efficiency in energy release.

France’s energy mix is undergoing a transformation as the country aims to achieve carbon neutrality by 2050. With ambitious plans to expand renewable energy production, particularly from offshore wind such as North Sea wind potential, solar, and hydropower, energy storage becomes essential for managing supply and demand. The new battery platform is poised to provide the necessary storage capabilities to keep up with this shift toward greener, more sustainable energy production.

Economic and Environmental Impact

The launch of the battery storage platform is a major boon for the French economy, creating jobs and attracting investment in the clean energy sector. The project is expected to generate hundreds of construction and operational jobs, providing a boost to local economies, particularly in the areas where the storage facilities are located.

From an environmental perspective, the platform’s ability to store and release renewable energy will greatly reduce the country’s reliance on fossil fuels, decreasing greenhouse gas emissions. The efficient storage of solar and wind energy will mean that more clean electricity can be used, with solar-plus-storage cheaper than conventional power in Germany underscoring cost competitiveness, even during times when these renewable sources are not producing at full capacity. This will help France meet its energy and climate goals, including reducing carbon emissions by 40% by 2030 and achieving carbon neutrality by 2050.

The development also aligns with broader European Union goals to increase the share of renewables in the energy mix. As EU nations work toward their collective climate commitments, energy storage projects like TagEnergy’s platform will be vital in helping the continent achieve a greener, more sustainable future.

A Step Toward Energy Independence

The new battery storage platform also has the potential to enhance France’s energy independence. By increasing the storage capacity for renewable energy, France will be able to rely less on imported fossil fuels and energy from neighboring countries, particularly during periods of high demand. Energy independence is a key strategic goal for many nations, as it reduces vulnerability to geopolitical tensions and fluctuating energy prices.

In addition to bolstering national security, the platform supports France’s energy transition by facilitating the deployment of more renewable energy. As storage capacity increases, grid operators will be able to integrate larger quantities of intermittent renewable energy without sacrificing reliability. This will enable France to meet its long-term energy goals while also supporting the EU’s ambitious climate targets.

Future of Battery Storage in France and Beyond

TagEnergy’s launch of France’s largest battery storage platform is a monumental achievement in the country’s energy transition. However, it is unlikely to be the last of its kind. The success of this project could pave the way for similar initiatives across France and the wider European market. As battery storage technology advances, and affordable solar batteries scale up, the capacity for storing and utilizing renewable energy will only grow, unlocking new possibilities for clean, affordable power.

Looking ahead, TagEnergy plans to expand its operations and further invest in renewable energy solutions. The French market, along with growing demand for storage solutions across Europe, presents significant opportunities for further development in the energy storage sector. With the continued integration of renewable energy into the grid, large-scale storage platforms will play an increasingly critical role in shaping a low-carbon future.

The launch of TagEnergy’s battery storage platform marks a pivotal moment for France’s renewable energy landscape. By providing critical storage capacity and ensuring the reliable delivery of clean electricity, the platform will help the country meet its ambitious climate and energy goals. As technology advances and the global transition to renewables accelerates, with over 30% of global electricity now coming from renewables, projects like this one will play an essential role in creating a sustainable, low-carbon energy future.

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China Coal-Fired Power Consolidation targets capacity cuts through mergers, SASAC-led restructuring, debt reduction, asset optimization, and retiring inefficient plants across state-owned utilities to improve efficiency, stabilize liabilities, and align with energy transition policies.

Key Points

A SASAC-driven plan merging utility assets to cut coal capacity, reduce debt, and retire outdated, loss-making plants.

✅ Merge five central utilities' coal assets to streamline operations

✅ Target 25-33% capacity cuts and >50% loss reduction by 2021

✅ Prioritize debt-ridden regions: Gansu, Shaanxi, Xinjiang, Qinghai, Ningxia

China plans to slash coal-fired power capacity at its five biggest utilities by as much as a third in two years by merging their assets, amid broader power-sector strains that reverberate globally, according to a document seen by Reuters and four sources with knowledge of the matter.

The move to shed older and less-efficient capacity is being driven by pressure to cut heavy debt levels at the utilities. China, is, however, building more coal-fired power plants and approving dozens of new mines to bolster a slowing economy, even as recent power cuts highlight grid imbalances.

The five utilities, which are controlled by the central government, accounted for around 44% of China’s total coal-fired power capacity at the end of 2018, a share likely to be tested by rising electrification goals, with electricity to meet 60% by 2060 according to industry forecasts.

“(The utilities) will strive to reduce coal-fired power capacity by one quarter to one third ...cutting total losses by more than 50% from the current level to achieve a significant decline in debt-to-asset ratios by the end of 2021,” the document said.

The plan, initiated and overseen by the State-owned Assets Supervision and Administration Commission of the State Council (SASAC), follows heavy losses at some of the utilities, amid a pandemic-era demand drop that hit industrial consumption.

Some of their coal-fired power stations have filed for bankruptcy in recent years as Beijing promotes the use of renewable energy and advances its nuclear program while opening up the state-controlled power market.

The SASAC did not immediately respond to a fax seeking comment and the sources declined to be identified as they were not authorised to speak to the media.

The utilities - China Huaneng Group Co, China Datang Corp, China Huadian Corp, State Power Investment Corp and China Energy Group - did not respond to faxes requesting comment.

Together, they had 474 coal-fired power plants with combined power generation capacity of 520 gigawatts (GW) at the end of last year.

Their coal-fired power assets came to 1.5 trillion yuan ($213 billion) while total coal-fired power liabilities were 1.1 trillion yuan, the document said.

The document was seen by two people at two of the utilities and was also verified by a source at SASAC and a government researcher.

It was not clear when the document was published but it said the merging and elimination of outdated capacity would start from 2019 and be achieved within three years, aiming to improve the efficiency and operations at the companies, reflecting a broader electricity sector mystery that policymakers are trying to resolve.

Utilities with debt-ridden operations in the northwestern regions of Gansu, Shaanxi, Xinjiang, Qinghai and Ningxia would be the first to carry out the plan, it said, even as India ration coal supplies during demand surges.

The government researcher said the SASAC has been researching possible consolidation in the coal-fired power sector since 2017, but added: “It’s easier said than done.”

“No one is willing to hand in their high quality assets and there is no point in merging the bad assets,” the government researcher said.

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US power grid modernization addresses aging infrastructure, climate resilience, extreme weather, EV demand, and clean energy integration, using AI, transmission upgrades, and resilient substations to improve reliability, reduce outages, and enable rapid recovery.

Key Points

US power grid modernization strengthens infrastructure for resilience, reliability, and clean energy under rising demand.

✅ Hardening substations, lines, and transformers against extreme weather

✅ Integrating EV load, DERs, and renewables into transmission and distribution

✅ Using AI, sensors, and automation to cut outages and speed restoration

The power grid in the U.S. is aging and already struggling to meet current demand, with dangerous vulnerabilities documented across the system today. It faces a future with more people — people who drive more electric cars and heat homes with more electric furnaces.

Alice Hill says that's not even the biggest problem the country's electricity infrastructure faces.

"Everything that we've built, including the electric grid, assumed a stable climate," she says. "It looked to the extremes of the past — how high the seas got, how high the winds got, the heat."

Hill is an energy and environment expert at the Council on Foreign Relations. She served on the National Security Council staff during the Obama administration, where she led the effort to develop climate resilience. She says past weather extremes can no longer safely guide future electricity planning.

"It's a little like we're building the plane as we're flying because the climate is changing right now, and it's picking up speed as it changes," Hill says.

The newly passed infrastructure package dedicates billions of dollars to updating the energy grid with smarter electricity infrastructure programs that aim to modernize operations. Hill says utility companies and public planners around the country are already having to adapt. She points to the storm surge of Hurricane Sandy in 2012.

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"They thought the maximum would be 12 feet," she says. "That storm surge came in close to 14 feet. It overcame the barriers at the tip of Manhattan, and then the electric grid — a substation blew out. The city that never sleeps [was] plunged into darkness."

Hill noted that Con Edison, the utility company providing New York City with energy, responded with upgrades to its grid: It buried power lines, introduced artificial intelligence, upgraded software to detect failures. But upgrading the way humans assess risk, she says, is harder.

"What happens is that some people tend to think, well, that last storm that we just had, that'll be the worst, right?" Hill says. "No, there is a worse storm ahead. And then, probably, that will be exceeded."

In 2021, the U.S. saw electricity outages for millions of people as a result of historic winter storms in Texas, a heatwave in the Pacific Northwest and Hurricane Ida along the Gulf Coast. Climate change will only make extreme weather more likely and more intense, driving longer, more frequent outages for utilities and customers.

In the West, California's grid reliability remains under scrutiny as the state navigates an ambitious clean energy shift.

And that has forced utility companies and other entities to grapple with the question: How can we prepare for blackouts and broader system stress we've never experienced before?

A modern power station in Maryland is built for the future
In the town of Edgemere, Md., the Fitzell substation of Baltimore Gas and Electric delivers electricity to homes and businesses. The facility is only a year or so old, and Laura Wright, the director of transmission and substation engineering, says it's been built with the future in mind.

She says the four transformers on site are plenty for now. And to counter the anticipated demand of population growth and a future reliance on electric cars, she says the substation has been designed for an easy upgrade.

"They're not projecting to need that additional capacity for a while, but we designed this station to be able to take that transformer out and put in a larger one," Wright says.

Slopes were designed to insulate the substation from sea level rise. And should the substation experience something like a catastrophic flooding event or deadly tornado, there's a plan for that too.

"If we were to have a failure of a transformer," Wright says, "we can bring one of those mobile transformers into the substation, park it in the substation, connect it up in place of that transformer. And we can do that in two to three days."

The Fitzell substation is a new, modern complex. Older sites can be knocked down for weeks.

That raises the question: Can the amount of money dedicated to the power grid in the new infrastructure legislation actually make meaningful changes to the energy system across the country, where studies find more blackouts than other developed nations persist?

"The infrastructure bill, unfortunately, only scratches the surface," says Daniel Cohan, an associate professor in civil and environmental engineering at Rice University.

Though the White House says $65 billion of the infrastructure legislation is dedicated to power infrastructure, a World Resources Institute analysis noted that only $27 billion would go to the electric grid — a figure that Cohan also used.

"If you drill down into how much is there for the power grid, it's only about $27 billion or so, and mainly for research and demonstration projects and some ways to get started," he says.

Cohan, who is also author of the forthcoming book Confronting Climate Gridlock, says federal taxpayer dollars can be significant but that most of the needed investment will eventually come from the private sector — from utility companies and other businesses spending "many hundreds of billions of dollars per decade," even as grid modernization affordability remains a concern. He also says the infrastructure package "misses some opportunities" to initiate that private-sector action through mandates.

"It's better than nothing, but, you know, with such momentous challenges that we face, this isn't really up to the magnitude of that challenge," Cohan says.

Cohan argues that thinking big, and not incrementally, can pay off. He believes a complete transition from fossil fuels to clean energy by 2035 is realistic and attainable — a goal the Biden administration holds — and could lead to more than just environmental benefit.

"It also can lead to more affordable electricity, more reliable electricity, a power supply that bounces back more quickly when these extreme events come through," he says. "So we're not just doing it to be green or to protect our air and climate, but we can actually have a much better, more reliable energy supply in the future."

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Skinners Pond Transmission Line expands PEI's renewable energy grid, enabling wind power integration, grid reliability, and capacity for the planned 40 MW windfarm, funded through the Green Infrastructure Stream to support sustainable economic growth.

Key Points

A 106-km grid project enabling PEI wind power, increasing capacity and reliability, linking Skinners Pond to Sherbrooke.

✅ 106-km line connects Skinners Pond to Sherbrooke substation

✅ Integrates 40 MW windfarm capacity by 2025

✅ Funded by Canada and PEI via Green Infrastructure Stream

The health and well-being of Canadians are the top priorities of the Governments of Canada and Prince Edward Island. But the COVID-19 pandemic has affected more than Canadians' personal health. It is having a profound effect on the economy.

That is why governments have been taking decisive action together to support families, businesses and communities, and continue to look ahead to planning for our electricity future and see what more can be done.

Today, Bobby Morrissey, Member of Parliament for Egmont, on behalf of the Honourable Catherine McKenna, Minister of Infrastructure and Communities, the Honourable Dennis King, Premier of Prince Edward Island, the Honourable Dennis King, Premier of Prince Edward Island, and the Honourable Steven Myers, Prince Edward Island Minister of Transportation, Infrastructure and Energy, announced funding to build a new transmission line from Sherbrooke to Skinners Pond, as part of broader Canadian collaboration on clean energy, with several premiers nuclear reactor technology to support future needs as well.

The new 106-kilometre transmission line and its related equipment will support future wind energy generation projects in western Prince Edward Island, complementing the Eastern Kings wind farm expansion already advancing. Once completed, the transmission line will increase the province's capacity to manage the anticipated 40 megawatts from the future Skinner's Pond Windfarm planned for 2025 and provide connectivity to the Sherbrooke substation to the northeast of Summerside.

The Government of Canada is investing $21.25 million and the Government of Prince Edward Island is providing $22.75 million in this project, reflecting broader investments in new turbines across Canada, through the Green Infrastructure Stream (GIS) of the Investing in Canada infrastructure program.

This projects is one in a series of important project announcements that will be made across the province over the coming weeks. The Governments of Canada and Prince Edward Island are working cooperatively to support jobs, improve communities and build confidence, while safely and sustainably restoring economic growth, as Nova Scotia increases wind and solar projects across the region.

"Investing in renewable energy infrastructure is essential to building healthy, inclusive, and resilient communities. The new Skinners Pond transmission line will support Prince Edward Island's production of green energy, focusing on wind resources rather than expanded biomass use in the mix. Projects like this also support economic growth and help us build a greener future for the next generation of Islanders."

Bobby Morrissey, Member of Parliament for Egmont, on behalf of the Honourable Catherine McKenna, Minister of Infrastructure and Communities

"We live on an Island that has tremendous potential in further developing renewable energy. We have an opportunity to become more sustainable and be innovative in our approach, and learn from regions where provinces like Manitoba have clean energy to help neighbouring provinces through interties. The strategic investment we are making today in the Skinner's Pond transmission line will allow Prince Edward Island to further harness the natural power of wind to create clean, locally produced and locally used energy that will benefit of all Islanders."

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