Nonprofit companyÂ’s energy vision lights Nicaraguan villages' future

By San Francisco Chronicle


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As dark clouds approached, Guillaume Craig packed up his tools, climbed into a rickety boat and sped off from a small fishing village, hoping to make the three-hour commute downriver before nightfall. The boat wasn't quite fast enough, so the former Oakland resident used a flashlight to guide his way back through endless miles of tropical forest.

"That was actually our easiest site to reach," said Craig, whose San Francisco-based Blue Energy foundation is delivering renewable energy to hundreds of residents along Nicaragua's remote Caribbean coast.

Craig, 31, his brother, Mathias, 33, and a small crew of volunteers have been traversing the muddy backwaters, installing solar panels and windmills for free and bringing renewable energy to villages, schools and health clinics where none existed before.

"It could make a huge difference in rural areas," said Mathias Craig, who says he has always been fascinated with wind power. "You can't even reach a lot of these places with power lines."

The San Francisco nonprofit has attracted the attention of the government of President Daniel Ortega, who has expressed interest in alternative technology to help alleviate the country's energy crunch. Within the next six months, the Craigs say, Blue Energy wind turbines will be tested at a UC Berkeley field station in Richmond. If they pass international standards, the Ortega government will consider using them countrywide.

Since June, many regions across the nation have experienced four- to eight-hour-a-day blackouts, prompting even Pacific Coast resort developers to knock on Blue Energy's doors. For now, the brothers say, the tourist areas will have to take a backseat to underserved rural communities. "We are a nonprofit," said Guillaume Craig.

Nearly 80 percent of Nicaragua's electricity is powered by oil. In July, Venezuelan President Hugo Chavez financed the construction of a 150,000-barrel-a-day, $2.5 billion refinery - the largest in Central America - as part of his oil-funded battle against U.S. influence in Latin America. Chavez has also sent generators to help offset the rolling blackouts.

Mathias Craig, who studied civil engineering at UC Berkeley, says Blue Energy began as a graduate project at the Massachusetts Institute of Technology before being incorporated in 2003. The next year, the Craigs arrived in Nicaragua - the only country where they are currently operating - at the behest of their mother. Colette Grinevald is a linguistics professor who specializes in indigenous languages along the Caribbean coast.

Blue Energy works mainly with Rama and Miskito Indians, who form part of an autonomous zone of 650,000 inhabitants with greater independence from the national government than the rest of the country. Since it began operations in Nicaragua, Blue Energy has provided electricity to five villages and 1,400 residents. To date, the foundation's most remote site is Punta de Aguila, a five-and-a-half-hour trip south of Bluefields over choppy waters.

While Hurricane Dean nearly destroyed several turbines earlier in the summer, this month's Hurricane Felix missed Blue Energy's area of operation.

The Craigs are convinced that wind and solar power are the most practical ways to bring energy to isolated indigenous villages far removed from any power grid. Currently, the only option for most coastal dwellers is diesel-powered generators.

"Our community has always lived in darkness," said Edgar Swartz, 32, standing in the shadow of an 80-foot Blue Energy wind turbine that powers the village of Kakabila, home to 700 people. "We think plenty about electricity."

Separated by geography and culture, the region is among the poorest in a nation that has the dubious distinction of being the second poorest in the Western Hemisphere, with Haiti being the poorest. On the Caribbean coast, basic health services are spotty, illiteracy is 65 percent in rural areas, and an estimated 80 percent go without regular electricity.

Blue Energy operates on an annual shoestring budget of about $120,000 in grants from the government of Finland and contributions from mainly American and French donors. The Craigs hope to eventually turn a profit that will sustain their nonprofit work.

The foundation currently churns out one new wind turbine a week from the rustic port town of Bluefields, the region's largest city with 50,000 people. Following a common design to harness wind power, the turbines are hand built and shipped in pieces in 15-foot wooden boats with outboard motors.

Blue Energy also buys solar panels from local distributors to keep communities powered during hot, non-windy days. The full wind and solar package costs $12,000 for 1 kilowatt of power. In contrast, a small diesel generator costs about $500 and is typically affordable only for those operating local businesses.

The foundation pays for installation for entire communities, but those who want power for private use, such as charging cell phones and hooking up television sets, must purchase a special $300 battery and pay roughly $4 a month for recharging fees.

Though more expensive than generators, alternative energy will pay for itself in the long run, the brothers argue. Using nothing but wind and sun, the Blue Energy installation pumps out roughly 3,500 watt-hours of electricity each day - enough to power five homes using a small radio and refrigerator over a 24-hour period.

The Craigs estimate that it takes three windmills to sufficiently power small communities of up to 700 people with basic energy needs. They hope alternative energy will allow these villages to open night schools and improve refrigeration for the main industry along the coast - seafood.

Mathias Craig, however, said his heart sank when he saw the first installation three years ago in Punta de Aguila being used to power television sets tuned to Spanish-language soap operas.

"We don't promote using television," he said. "But they get to pick."

In the meantime, the Craigs hope to train Nicaraguans in solar and wind power that will one day rival the nation's largest privately owned electrical companies.

That makes perfect sense to Poochy Newton, 48, a Miskito fisherman who is selling his diesel generator to become the first nonbusiness user of alternative energy in Set Net Point, a four-hour boat ride north of Bluefields. Newton calculates that he will save about $30 a month by not using diesel fuel, which is shipped in, for his generator.

"Diesel is very expensive," Newton said. "The wind is going to work out much better."

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LOC Renewables Delivers First MWS Services To China's Offshore Wind Market

Pinghai Bay Offshore Wind Farm MWS advances marine warranty survey best practices, risk management, and international standards in Fujian, with Haixia Goldenbridge Insurance and reinsurer-aligned audits supporting safer offshore wind construction and logistics.

 

Key Points

An MWS program ensuring Pinghai Bay Phase 2 meets standards via audits, risk controls, and vetted procedures.

✅ First MWS delivered in China's offshore wind market

✅ Audits, risk consultancy, and reinsurer-aligned standards

✅ Supports 250MW Phase 2 at Pinghai Bay, Fujian

 

LOC Renewables has announced it is to carry out marine warranty survey (MWS) services for the second phase of the Pinghai Bay Offshore Wind Farm near Putian, Fujian province, China, on behalf of Haixia Goldenbridge Insurance Co., Ltd. The agreement represents the first time MWS services have been delivered to the Chinese offshore wind market.

China’s installed offshore capacity jumped more than 60% in 2017, and its growing offshore market is aiming for a total grid-connected capacity of 5GW by 2020, as the sector globally advances toward a $1 trillion industry over the coming decades. Much of this future offshore development is slated to take place in Jiangsu, Zhejiang, Guangdong and Fujian provinces. As developers becoming increasingly aware of the need for stringent risk management and value that internationally accepted standards can bring to projects, Pinghai Bay will be the first Chinese offshore wind farm to employ MWS to ensure it meets the highest technical standards and minimise project risk. The agreement will see LOC Renewables carry out audit and risk consultancy services for the project from March until the end of 2018.

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In recent years, as Chinese offshore wind projects have grown in scale and complexity the need for international expertise in the market has increased, with World Bank support for emerging markets underscoring global momentum. In response, domestic insurers are partnering with international reinsurers to manage and mitigate the associated larger risks. Applying the higher standards required by international reinsurers, LOC Renewables will draw on its extensive experience in European, US and Asian offshore wind markets to provide MWS services on the Pinghai project from its Tianjin office.

“As offshore wind technology continues to proliferate across Asia, driven by declining global costs, successful knowledge transfer based on best practices and lessons learned in the established offshore wind markets becomes ever more important,” said Ke Wan, Managing Director, LOC China.

“With a wealth of experience in Europe and the US, where UK offshore wind growth has accelerated, we’re increasingly working on projects across Asia, and are delighted to now be providing the first MWS services to China’s offshore wind market – services that bring real value in lower risk and will enable the project to achieve its full potential.”

“At 250MW, phase two of the Pinghai Bay Wind Farm represents a significant expansion on phase one, and we wanted to ensure that it met the highest technical and risk mitigation standards, informed by regional learnings such as Korean installation vessels analyses,” said Fan Ming, Business Director at Haixia Goldenbridge Insurance.

“In addition to their global experience, LOC Renewables’ familiarity with and presence in the local market was very important to us, and we’re looking forward to working closely with them to help bring this project to fruition and make a significant contribution to China’s expanding offshore wind market.”

 

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Newsom Vetoes Bill to Codify Load Flexibility

California Governor Gavin Newsom vetoed a bill aimed at expanding load flexibility in state grid planning, citing conflicts with California’s resource adequacy framework and concerns over grid reliability and energy planning uncertainty.

 

Why has Newsom vetoed the Bill to Codify Load Flexibility?

Governor Gavin Newsom’s veto blocks legislation that would have required the California Energy Commission to incorporate load flexibility into the state’s energy planning and policy framework, a move that has stirred debate across the clean energy sector.

✅ Argues the bill conflicts with California’s existing Resource Adequacy system

✅ Draws backlash from clean energy and grid modernization advocates

✅ Exposes ongoing tension over how to manage renewable integration and demand response

 

California Governor Gavin Newsom has vetoed Assembly Bill 44, which would have required the California Energy Commission to evaluate and incorporate load management mechanisms into the state’s energy planning process. The move drew criticism from clean energy advocates who say it undermines efforts to strengthen grid reliability and reduce costs.

The bill directed the commission to adopt “upfront technical requirements and load modification protocols” that would allow load-serving entities to adjust their electrical demand forecasts. Proponents viewed this as a way to modernize California’s grid management, and to explore a revamp of electricity rates to help clean the grid, making it more responsive to demand fluctuations and renewable energy variability.

In his veto statement, Newsom said the bill was incompatible with existing energy planning frameworks, even as a looming electricity shortage remains a concern. “While I support expanding electric load flexibility, this bill does not align with the California Public Utility Commission’s Resource Adequacy framework,” he said. “As a result, the requirements of this bill would not improve electric grid reliability planning and could create uncertainty around energy resource planning and procurement processes.”

Newsom’s decision comes shortly after he signed a broad package of energy legislation that set the stage for a regional Western electricity market and extended the state’s cap-and-trade program. However, that legislative package did not include continued funding for several key grid reliability programs — including what advocates have called the world’s largest virtual power plant, a distributed network of connected devices that can balance electricity demand in real time.

Clean energy supporters saw AB 44 as a crucial step toward integrating these distributed energy resources into long-term grid planning. “With Assembly Bill 44 being vetoed, the state has missed a huge opportunity to advance common-sense policy that would have lowered costs, strengthened the grid, and unlocked the full potential of advanced energy,” said Edson Perez, California lead at Advanced Energy United.

Perez added that the setback increases pressure on lawmakers to take stronger action in the next legislative session. “The pressure is on next session to ensure that California is using all tools in its policy toolbox to build critically needed infrastructure, strengthen the grid, and bring costs down,” he said.

California’s growing use of demand response programs and virtual power plants has been central to its strategy for managing grid stress during heat waves and wildfire seasons. These systems allow utilities and customers to temporarily reduce or shift energy use, helping to prevent blackouts and reduce the need for fossil-fuel peaker plants during peak demand.

A recent report by the Brattle Group found that California’s taxpayer-funded virtual power plant could save ratepayers $206 million between 2025 and 2028 while reducing reliance on gas generation. The study, commissioned by Sunrun and Tesla Energy, highlighted the potential for flexible load management to improve both grid reliability and reduce costs, even as regulators weigh whether the state needs more power plants to ensure reliability.

Despite these findings, Newsom’s veto signals continued tension between state policymakers and clean energy advocates over how best to modernize California’s power grid. While the governor has prioritized large-scale renewable development and regional market integration, critics argue that California’s climate policy choices risk exacerbating reliability challenges and that failing to codify load flexibility could slow progress toward a more adaptive, resilient, and affordable clean energy future.

 

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Ukrainians Find New Energy Solutions to Overcome Winter Blackouts

Ukraine Winter Energy Crisis highlights blackouts, damaged grid, and resilient solutions: solar panels, generators, wood stoves, district heating, batteries, and energy efficiency campaigns backed by EU and US aid to support communities through harsh winters.

 

Key Points

A wartime surge of blackouts driving resilient, off-grid and efficiency solutions to keep heat and power flowing.

✅ Solar panels, batteries, and generators stabilize essential loads

✅ Wood stoves and district heating maintain winter warmth

✅ Efficiency upgrades and aid bolster grid resilience

 

As winter sets in across Ukraine, the country faces not only the bitter cold but also the ongoing energy crisis exacerbated by Russia’s invasion. Over the past year, Ukraine has experienced widespread blackouts due to targeted strikes on its power infrastructure. With the harsh winter conditions ahead, Ukrainians are finding innovative ways to adapt to these energy challenges and to keep the lights on this winter despite shortages. From relying on alternative power sources to implementing energy-saving measures, the Ukrainian population is demonstrating resilience in the face of adversity.

The Energy Crisis in Ukraine

Since the onset of the war in February 2022, Ukraine’s energy infrastructure has become a prime target for Russian missile strikes. Power plants, electrical grids, and transmission lines have all been hit, causing significant damage to the nation’s energy systems, as Ukraine fights to keep the lights on amid repeated attacks. As a result, millions of Ukrainians have faced regular power outages, especially in the winter months when energy demand surges due to heating needs.

The situation has been compounded by the difficulty of repairing damaged infrastructure while the war continues. Many areas, particularly in eastern and southern Ukraine, still suffer from limited access to electricity, heating, and water, with strikes in western Ukraine occasionally causing further disruptions. With no end in sight to the conflict, the Ukrainian government and its citizens are being forced to think outside the box to ensure they can survive the harsh winter months.

Alternative Energy Sources: Solar Power and Generators

In response to these energy shortages, many Ukrainians are turning to alternative energy sources, particularly solar power and generators. Solar energy, which has been growing in popularity over the past decade, is seen as a promising solution. Solar panels can be installed on homes, schools, and businesses, providing a renewable source of electricity. During the day, the sun provides much-needed energy to power lights, appliances, and even heating systems in homes. While solar power may not fully replace the energy lost during blackouts, it can significantly reduce dependency on the grid, and recent electricity reserve updates suggest fewer planned outages if attacks abate.

To make solar power more accessible, many local and international organizations are providing solar panels and batteries to Ukrainians. These efforts have been critical, especially in rural areas where access to the national grid may be sporadic or unreliable. Additionally, solar-powered streetlights and community energy hubs are being set up in various cities to provide essential services during prolonged outages.

Generators, too, have become a vital tool for many households. Portable generators allow people to maintain some level of comfort during blackouts, powering essential appliances like refrigerators, stoves, and even small heaters. While generators are not a permanent solution, they offer a crucial lifeline when the grid is down for extended periods.

Wood and Coal Stoves: A Return to the Past

In addition to modern energy solutions, many Ukrainians are returning to more traditional sources of energy, such as wood and coal stoves. These methods of heating, while old-fashioned, are still widely available and effective. With gas shortages affecting the country and electricity supplies often unreliable, wood and coal stoves have become an essential part of daily life for many households.

Firewood is being sourced locally, and many Ukrainians are collecting and stockpiling it in preparation for the colder months. While this reliance on solid fuels presents environmental concerns, it remains one of the most feasible options for families living in rural areas or in homes without access to reliable electricity.

Moreover, some urban areas have seen a revival of district heating systems, where heat is generated centrally and distributed throughout a network of buildings. This system, although not without its challenges, is helping to provide warmth to thousands of people in larger cities like Kyiv and Lviv.

Energy Conservation and Efficiency

Beyond alternative energy sources, many Ukrainians are taking measures to reduce their energy consumption. Energy conservation has become a key strategy in dealing with blackouts, as individuals and families aim to minimize their reliance on the national grid. Simple steps like using energy-efficient appliances, sealing windows and doors to prevent heat loss, and limiting the use of electric heating have all become commonplace.

The Ukrainian government, in collaboration with international partners, has also launched campaigns to encourage energy-saving behaviors. These include public information campaigns on how to reduce energy consumption and initiatives to improve the insulation of homes and buildings. By promoting energy efficiency, Ukraine is not only making the most of its limited resources but also preparing for long-term sustainability.

The Role of the International Community

The international community has played a crucial role in helping Ukraine navigate the energy crisis. Several countries and organizations have provided funding, technology, and expertise to assist Ukraine in repairing its power infrastructure and implementing alternative energy solutions. For example, the United States and the European Union have supplied Ukraine with generators, solar panels, and other renewable energy technologies, though U.S. support for grid restoration has recently ended in some areas of assistance. This support has been vital in ensuring that Ukrainians can meet their energy needs despite the ongoing conflict.

In addition, humanitarian organizations have been working to provide emergency relief, including distributing winter clothing, heaters, and fuel to the most vulnerable populations, and Ukraine helped Spain amid blackouts earlier this year, underscoring reciprocal resilience. The global response has been a testament to the solidarity that exists for Ukraine in its time of need.

As winter arrives, Ukrainians are finding creative and resourceful ways to deal with the ongoing energy crisis caused by the war, reflecting the notion that electricity is civilization on the front lines. While the situation remains difficult, the country's reliance on alternative energy sources, traditional heating methods, and energy conservation measures demonstrates a remarkable level of resilience. With continued support from the international community and a commitment to innovation, Ukraine is determined to overcome the challenges of blackouts and ensure that its people can survive the harsh winter months ahead.

 

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Energy UK - Switching surge continues

UK Energy Switching Surge sees 600,000 customers change suppliers in October, driven by competition, the Energy Switch Guarantee, and better tariffs, with Electralink's DTN supporting customer switching and Ofgem oversight.

 

Key Points

A rise in UK customers switching electricity suppliers in October, driven by competition and the Energy Switch Guarantee.

✅ 600,000 switches recorded in October

✅ 32% moved to small and mid-tier suppliers

✅ Energy Switch Guarantee assures simple, safe transfers

 

More than 600,000 customers took steps to save on their energy bills this winter by switching electricity provider in October, as forecasts such as a 16% bill decrease in April offer further encouragement, the latest figures from Energy UK reveal.

A third (32 per cent) of those changing providers in October moved to small and mid-tier suppliers.

Regional markets have seen changes too, including Irish electricity price increases that highlight wider cost pressures.

With recent research showing that that nine in ten energy switchers were happy with the process of changing suppliers and with the reassurance provided by the Energy Switch Guarantee - a series of commitments ensuring switches are simple, speedy and safe - and amid MPs proposing price restrictions to protect consumers, more and more customers are now confident when looking to move.

Lawrence Slade, chief executive of Energy UK said: 'Switching continues to surge with over 600,000 customers changing supplier to find a better deal last month. Many more will have made savings by checking they are on the best deal with their current supplier. It only takes a few minutes to do this and with over 55 suppliers across the market, there's never been more competition or choice.'

Around 75 per cent of the market are signatories of the Guarantee. This includes: British Gas, Bulb Energy, E.ON, EDF Energy, First Utility, Flow Energy, npower, Octopus Energy, Pure Planet, Sainsbury's Energy, Scottish Power, So Energy and Tonik Energy.

The switching data is supplied by Electralink who provides a secure service to transfer data between the electricity market participants. The company operates the Data Transfer Network (DTN) which underpins customer switching, meter interoperability and other business processes critical to a competitive electricity market, where knowing where your electricity comes from can support informed choices.

The data referenced in these reports is since our collection of data only and is for electricity only.

These figures do not include internal electricity switching, and statistics on this from the larger suppliers and on Standard Variable Tariffs can be viewed on the Ofgem website, while ministers consider ending the gas-electricity price link to reduce bills.

 

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Three New Solar Electricity Facilities in Alberta Contracted At Lower Cost than Natural Gas

Alberta Solar Energy Contracts secure low-cost photovoltaic PPAs for government operations, delivering renewable electricity at 4.8 cents/kWh, beating natural gas LCOE, enhancing summer grid efficiency across Hays, Tilley, and Jenner with Canadian Solar.

 

Key Points

Low-cost PV power agreements meeting 55% of Alberta government electricity demand via new Canadian Solar facilities.

✅ Price: 4.8 cents/kWh CAD, under gas-fired generation LCOE.

✅ Sites: Hays, Tilley, Jenner; 50% equity with Conklin Métis Local #193.

✅ Supplies 55% of provincial government electricity demand.

 

Three new solar electricity facilities to be built in south eastern Alberta (Canada) amid Alberta's solar growth have been selected through a competitive process to supply the Government of Alberta with 55 per cent of their annual electricity needs. The facilities will be built near Hays, Tilley, and Jenner, by Canadian Solar with Conklin Métis Local #193 as 50-percent equity owners.

The Government of Alberta's operations have been powered 100 per cent with wind power since 2007. Upon the expiration of some of these contracts, they have been renewed to switch from wind to solar energy. The average contract pricing will be $0.048 per kilowatt hour (3.6 cents/kWh USD), which is less than the average historical wholesale power pool price paid to natural gas-fired electricity in the province in years 2008 - 2018.

"The conversation about solar energy has long been fixated on its price competitiveness with fossil fuels," said John Gorman, CanSIA President & CEO. "Today's announcement demonstrates that low cost solar energy has arrived as a mainstream option in Alberta, even as demand for solar lags in Canada according to federal assessments. The conversation should next focus on how to optimize an all-of-the-above strategy for developing the province's renewable and non-renewable resources."

"This price discovery is monumental for the solar industry in Canada" said Patrick Bateman, CanSIA Director of Policy & Market Development. "At less than five cents per kilowatt hour, this solar electricity has a cost that is less than that of natural gas. Achieving Alberta's legislated 30 per cent by 2030 renewable electricity target just became a whole lot cheaper!".

 

Quick Facts:

  • The contract price of 4.8 cents/kWh CAD to be paid by Alberta Infrastructure for this solar electricity represents a lower Levelized Cost of Electricity (LCOE) than the average annual wholesale price paid by the power pool to combined-cycle and single-cycle natural gas-fired electricity generation which was 7.1 cents/kWh and 11.2 cents/kWh respectively from 2008 - 2018.
  • Alberta receives more hours of sunshine than Miami, Florida in the summer months. Alberta's electricity supply is most strained in summer, highlighting challenges for solar expansion when high temperatures increase the resistance of the distribution and transmission systems, and reduce the efficiency of cooling thermal power plants. For this reason, solar facilities sited near to electricity demand improves overall grid efficiency. Supply shortages are atypical in Alberta in winter when solar energy is least available. When they do occur, imports are increased and large loads are decreased.
  • In 2018, Alberta's solar electricity generation exceeded 50 MW. While representing much less than 1% of the province's electricity supply today, the Canadian Solar Industries Association (CanSIA) forecasts that solar energy could supply as much as 3 per cent of the province's electricity by 2030, supporting renewable energy job growth across Alberta. A recent supply chain study of the solar electricity sector in Alberta by Solas Energy Consulting Inc. found a potential of $4.1 billion in market value and a labour force rising to 10,000 in 2030.

 

To learn more about solar energy and the best way for consumers to go solar, please visit the Canadian Solar Industries Association at www.CanSIA.ca.

 

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National Grid and SSE to use electrical transformers to heat homes

Grid Transformer Waste Heat Recovery turns substations into neighborhood boilers, supplying district heating via heat networks, helping National Grid and SSE cut emissions, boost energy efficiency, and advance low carbon, net zero decarbonization.

 

Key Points

Grid Transformer Waste Heat Recovery captures substation heat for district heating, cutting emissions and gas use.

✅ Captures waste heat from National Grid transformers

✅ Feeds SSE district heat networks for nearby homes

✅ Cuts carbon, improves efficiency, aligns with net zero

 

Thousands of homes could soon be warmed by the heat from giant electricity grid transformers for the first time as part of new plans to harness “waste heat” and cut carbon emissions from home heating.

Trials are due to begin on how to capture the heat generated by transmission network transformers, owned by National Grid, to provide home heating for households connected to district heating networks operated by SSE.

Currently, hot air is vented from the giant substations to help cool the transformers that help to control the electricity running through National Grid’s high-voltage transmission lines.

However, if the trial succeeds, about 1,300 National Grid substations could soon act as neighbourhood “boilers”, piping water heated by the substations into nearby heating networks, and on into the thousands of homes that use SSE’s services.

“Electric power transformers generate huge amounts of heat as a byproduct when electricity flows through them. At the moment, this heat is just vented directly into the atmosphere and wasted,” said Nathan Sanders, the managing director of SSE Energy Solutions.

“This groundbreaking project aims to capture that waste heat and effectively turn transformers into community ‘boilers’ that serve local heat networks with a low- or even zero-carbon alternative to fossil-fuel-powered heat sources such as gas boilers, a shift akin to a gas-for-electricity swap in heating markets,” Sanders added.

Alexander Yanushkevich, National Grid’s innovation manager, said the scheme was “essential to achieve net zero” and a “great example of how, taking a whole-system approach, including power-to-gas in Europe precedents, the UK can lead the way in helping accelerate decarbonisation”.

The energy companies believe the scheme could initially reduce heat network carbon emissions by more than 40% compared with fossil gas systems. Once the UK’s electricity system is zero carbon, and with recent milestones where wind was the main source of UK electricity on the grid, the heating solution could play a big role in helping the UK meet its climate targets.

The first trials have begun at National Grid’s specially designed testing site at Deeside in Wales to establish how the waste heat could be used in district heating networks. Once complete, the intellectual property will be shared with smaller regional electricity network owners, which may choose to roll out schemes in their areas.

Tim O’Reilly, the head of strategy at National Grid, said: “We have 1,300 transmission transformers, but there’s no reason why you couldn’t apply this technology to smaller electricity network transformers, too, echoing moves to use more electricity for heat in colder regions.”

Once the trials are complete, National Grid and SSE will have a better idea of how many homes could be warmed using the heat generated by electricity network substations, O’Reilly said, and how the heat can be used in ways that complement virtual power plants for grid resilience.

“The heavier the [electricity] load, which typically reaches a peak at around teatime, the more heat energy the transformer will be able to produce, aligning with times when wind leads the power mix nationally. So it fits quite nicely to when people require heat in the evenings,” he added.

Other projects designed to capture waste heat to use in district heating schemes include trapping the heat generated on the Northern line of London’s tube network to warm homes in Islington, and harnessing the geothermal heat from disused mines for district heating networks in Durham.

Only between 2% and 3% of the UK is connected to a district heating network, but more networks are expected to emerge in the years ahead as the UK tries to reduce the carbon emissions from homes, alongside its nuclear power plans in the wider energy strategy.

 

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