Energy Digest

Daily Summaries & Key Takeaways of Power & Energy Updates
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Last Updated: November 26, 2025 at 06:00 PM
17
News & Articles
3
Research Papers
1

250MWh ‘Sand Battery’ to start construction in Finland, for both heating and ancillary services

Summary

A large-scale "Sand Battery" project is set to commence in Finland, utilizing Polar Night Energy's technology for district heating and ancillary services. The project, partnered by Lahti Energia, will provide a significant boost to the region's energy infrastructure with a massive 250MW thermal energy storage capacity. This initiative aims to increase the efficiency and reliability of the heating network.
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Key Takeaways

  • The "Sand Battery" technology is being used in its largest scale yet for a 250MW thermal energy storage system, marking a significant milestone in the adoption of this innovative energy solution.
  • The project will provide both heating power (2MW) and ancillary services to Lahti Energia's district heating network in Vääksy, Finland.
  • This large-scale deployment is expected to enhance the efficiency and reliability of the region's energy infrastructure, contributing to a more sustainable future.
2

Suggestions Offered for DOE’s ‘Speed to Power’ Initiative

Summary

The US Department of Energy's "Speed to Power" initiative aims to accelerate the development of large-scale grid infrastructure for data centers and artificial intelligence. The DOE has solicited feedback from stakeholders, including public power utilities, which have shared their concerns and suggestions for the initiative. The American Public Power Association (APPA) emphasized the importance of providing financial and technical assistance, streamlining applications, and promoting public-private joint ownership of transmission projects.
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Key Takeaways

  • Public power utilities face significant constraints in expanding capacity while protecting existing customers from risks and costs, and welcome a federal role in accelerating critical projects.
  • APPA suggests that ensuring financial and technical assistance are available for public utilities and streamlining the application process is crucial for the initiative's success.
  • Joint action on projects by individual utilities alone may be limited, and public-private partnerships, such as public-private joint ownership of transmission, could facilitate progress.
  • Coordination among federal agencies is also essential to ensure the initiative's effectiveness.
3

Indian state sets record low battery storage tariff

Summary

Rajasthan Rajya Vidyut Utpadan Nigam Ltd. (RRVUNL) has concluded a tender for a 500 MW/2000 MWh standalone battery energy storage system at a record-low price of INR 285,000 ($3,195)/MW per month, making it the nation's lowest tariff to date for a four-hour, single-cycle system. This achievement is significant, as it nearly matches the two-hour, two-cycle L1 tariff without viability gap funding. The selected developers will set up the systems on a build-own-operate basis to meet Rajasthan's peak and off-peak energy requirements.
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Key Takeaways

  • The tender price of INR 285,000 ($3,195)/MW per month is the nation's lowest tariff for a four-hour, single-cycle system, marking a significant decline from previous rates.
  • The selected developers will use the storage systems on an on-demand basis to meet Rajasthan's peak and off-peak energy requirements, demonstrating the utility's commitment to efficient energy management.
  • The projects awarded are eligible for central financial assistance in the form of viability gap funding through the Power System Development Fund scheme issued by the Ministry of Power.
4

Australia: Potentia gains consent for 1GWh solar hybrid as Fluence delivers to 600MWh battery storage site

Summary

Potentia Energy has received federal environmental approval for its 1,000MWh Tallawang Solar Hybrid project in Australia. Fluence has also successfully delivered its Gridstack battery energy storage equipment to Ampyr Australia's Bulabul Battery installation, which features a capacity of 600MWh. These developments demonstrate the growing momentum behind Australia's renewable energy sector.
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Key Takeaways

  • Potentia Energy has secured federal environmental approval for its Tallawang Solar Hybrid project, indicating that the project is moving forward with minimal regulatory hurdles.
  • The delivery of Fluence's Gridstack battery energy storage equipment to Ampyr Australia's Bulabul Battery installation highlights the increasing adoption of large-scale battery storage solutions in Australia.
  • These developments suggest a growing trend towards hybrid solar energy projects and expanding grid-scale battery storage capacity in Australia, underscoring the country's commitment to renewable energy development.
5

California sees sustained decline in natural gas use as solar output rises

Summary

California's electricity generation mix is shifting towards solar energy, with utility-scale solar generation nearly doubling its output from 2020. The state's natural gas use has also declined, with a 9.5 billion kWh decrease in 2025 compared to the previous year. This trend suggests that California's transition to renewable energy sources is gaining momentum.
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Key Takeaways

  • Solar energy is rapidly increasing in California, nearly doubling its output from 2020 and accounting for a significant portion of the state's electricity generation.
  • Natural gas use has declined by 9.5 billion kWh in 2025 compared to the previous year, representing a 17% decrease, with the trend showing consistency since 2021.
  • The growth of solar energy is contributing to a shift away from natural gas as a primary source of electricity in California, indicating a significant transition towards renewable energy sources.
6

Small but mighty grid batteries take root in Virginia amid energy crunch

Summary

A growing trend of midsize energy-storage units is taking root in Virginia, with two new projects on the eastern peninsula aiming to provide a clean-energy solution amid an energy crunch. These small but mighty grid batteries are cheaper and quicker to build than traditional large-scale utility projects. The 10-megawatt battery project mentioned could be part of this trend.
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Key Takeaways

  • Midsize energy-storage units, larger than typical home batteries paired with rooftop solar, are becoming a growing trend in the clean-energy transition.
  • These smaller batteries are cheaper and quicker to build compared to massive utility-scale projects, making them more accessible for widespread adoption.
  • The development of these midsize grid batteries may provide a cleaner alternative to meet energy demands amid energy crunches or supply chain disruptions.
7

Liquid air energy storage startup Highview breaks ground at 300MWh UK project

Summary

Highview, a startup specializing in liquid air energy storage, has commenced construction on its 300MWh facility in the UK. The project is marked by the presence of Mayor of Greater Manchester Andy Burnham, indicating significant support for the initiative. This development showcases the growing interest in liquid air energy storage as a viable alternative to traditional energy storage methods.
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Key Takeaways

  • Highview's 300MWh liquid air energy storage facility is one of the largest such projects currently under construction in the UK.
  • The project's commencement suggests strong support from local authorities, with Mayor Andy Burnham actively involved in marking the start of construction.
  • Liquid air energy storage represents a promising alternative to traditional energy storage methods, offering potential benefits in terms of scalability and efficiency.
8

‘Rapid growth but disorderly competiton’: Longi enters energy storage industry with PotisEdge deal

Summary

Longi, a Chinese solar PV giant, has entered the energy storage industry through its acquisition of system integrator PotisEdge. This move marks Longi's foray into the rapidly growing but competitive energy storage market. The deal underscores the increasing importance of energy storage solutions in meeting global renewable energy targets.
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Key Takeaways

  • Longi's entry into the energy storage industry highlights the growing demand for sustainable energy solutions and the need for companies to diversify their product offerings.
  • The acquisition of PotisEdge represents a strategic move by Longi to establish itself as a major player in the rapidly growing energy storage market, which is expected to continue its rapid growth in the coming years.
  • The deal suggests that China's solar PV industry is expanding into adjacent markets, such as energy storage, to drive innovation and capture new business opportunities.
9

Parties Warn FERC that Jurisdictional Fight Could Slow Data Center Connection Effort

Summary

The article reports on comments received by FERC regarding its Advance Notice of Proposed Rulemaking (ANOPR) to improve the rules for large load interconnections. Parties, including the Edison Electric Institute, have expressed concerns that over-expansion of jurisdictional issues could hinder the speed-to-market effort and undermine traditional regulatory paradigms. They argue that states and FERC can regulate retail interconnections without disrupting the existing regulatory framework.
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Key Takeaways

  • Parties are warning FERC not to go too far into jurisdictional issues, which could potentially slow down data center connection efforts.
  • The Edison Electric Institute emphasizes that large load customers are end-use retail customers, requiring local distribution service and wholesale transmission service, suggesting that traditional regulation can be effective in facilitating rapid interconnections.
  • States have successfully regulated retail interconnections for decades, including those of large retail loads, and over-expansion of jurisdictional issues could have unintended consequences that undermine the goals of FERC and its stakeholders.
10

Safety and sustainability: Dual pillars shaping Australia’s energy storage sector

Summary

Australia's transition to renewable energy sources has led to a growing demand for reliable and sustainable energy storage solutions. The country is rapidly developing its energy storage sector, driven by the need for safety and sustainability in power and energy systems. This trend is expected to shape the future of Australia's energy landscape.
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Key Takeaways

  • The article highlights the increasing importance of safety and sustainability in the development of energy storage solutions in Australia.
  • As Australia transitions towards renewables, there is a growing demand for reliable and sustainable energy storage solutions to ensure a stable power supply.
  • The country's energy storage sector is expected to play a crucial role in meeting the demands of a rapidly changing energy landscape.
11

Acacia Energy to resell OptiGrid’s AI-powered battery platform for C&I customers in Australia

Summary

Acacia Energy has partnered with OptiGrid to resell its AI-powered battery platform to commercial and industrial (C&I) customers in Australia, aiming to accelerate the deployment of battery storage solutions.
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Key Takeaways

  • The partnership between Acacia Energy and OptiGrid aims to expand access to battery storage technologies for C&I customers in Australia.
  • OptiGrid's AI-powered battery platform is designed to optimize battery performance and trading, providing a more efficient energy management solution.
  • The collaboration is expected to accelerate the adoption of battery storage in the C&I sector, supporting Australia's transition towards renewable energy sources.
12

Toshiba Targets Motorcycles and Boats With Its Batteries

Summary

Toshiba has established itself in the lithium-ion battery market, particularly in industrial, automotive, and energy sectors. Despite using a more expensive anode material with lower energy density, Toshiba's batteries are gaining traction in price-sensitive markets such as low-power vehicles, boats, and industrial equipment. The company's SCiB batteries offer flexible configurations and applications in various industries.
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Key Takeaways

  • Toshiba is targeting the lithium-ion battery market for its industrial, automotive, and energy sectors, using a more expensive anode material with lower energy density to gain competitiveness in price-sensitive markets.
  • The company's SCiB batteries are available in single cells, modules, and packs, offering flexible configurations and applications in industries such as renewable energy systems, energy storage, and grid-frequency regulation.
  • Toshiba is leveraging its battery technology for various applications beyond traditional automotive use cases, expanding into emerging markets like low-power vehicles, boats, and industrial equipment.
13

Plenitude tests perovskite-silicon tandem solar modules in utility-scale installation pilot

Summary

Plenitude, an Italian renewable energy company controlled by Eni, has partnered with Swift Solar to test and evaluate the performance of Swift Solar's perovskite-silicon tandem solar technology in a utility-scale installation pilot. The partnership aims to validate the technology's efficiency and durability under commercial conditions. This milestone represents a significant step forward in the commercialization of perovskite technology for utility-scale solar.
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Key Takeaways

  • Plenitude is partnering with Swift Solar to test and evaluate the performance of its 28% efficient perovskite-silicon tandem solar technology in a utility-scale project.
  • The partnership aims to validate the technology's efficiency and durability under commercial conditions, representing a significant step forward in the commercialization of perovskite technology for utility-scale solar.
  • Swift Solar's technology is expected to achieve module efficiencies of 28% or higher, providing up to 40% more power from the same footprint compared to conventional solar panels.
14

Data centers are breaking the old grid. Let AI build the new one.

Summary

The article suggests that the increasing use of data centers is straining the traditional grid, and AI has the potential to revolutionize the way power systems are designed and managed. By leveraging AI, utilities can set new standards for reliability and affordability. This shift could lead to a more efficient and sustainable energy infrastructure.
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Key Takeaways

  • Data centers are putting pressure on the traditional grid, highlighting the need for innovative solutions to manage increasing energy demands.
  • The adoption of AI by utilities could lead to significant improvements in power system efficiency, reliability, and affordability.
  • AI has the potential to enable a more decentralized and flexible energy infrastructure, reducing strain on traditional grids.
15

No more PJM data centers unless they can be reliably served: market monitor

Summary

The PJM Interconnection's market monitor has recommended to the Federal Energy Regulatory Commission that large data centers can only be approved if the grid operator can still meet reliability metrics, suggesting a connection between the growth of data centers and grid reliability concerns.
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Key Takeaways

  • Large data centers may face stricter regulations unless they can be reliably served by the grid.
  • The PJM Interconnection's market monitor is urging the Federal Energy Regulatory Commission to take action on this issue.
  • Data center growth has raised concerns about grid reliability, highlighting the need for a more sustainable and efficient energy infrastructure.
16

NERC: Winter Grid Reliability at Risk Amid Soaring Demand, Fuel Supply Gaps

Summary

The North American Electric Reliability Corporation (NERC) has warned that winter grid reliability is at risk due to soaring demand and fuel supply gaps. A recent Winter Reliability Assessment found that large areas of the continent face an elevated risk of electricity shortfalls during prolonged, wide-area cold snaps. This poses a threat to power grids in regions such as the Maritimes, New England, and parts of the Southeast.
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Key Takeaways

  • The NERC's Winter Reliability Assessment highlights regions at elevated risk of electricity shortfalls during extreme winter conditions, including areas with natural gas pipeline capacity constraints.
  • Soaring demand for electricity poses a significant challenge to power grids, particularly in regions already facing fuel supply gaps due to infrastructure constraints or other factors.
  • The assessment underscores the need for improved grid resilience and planning to mitigate the impact of prolonged, wide-area cold snaps on winter power reliability.
17

NERC: Winter Grid Reliability at Risk Amid Soaring Demand, Fuel Supply Gaps

Summary

The North American Electric Reliability Corporation (NERC) has warned that winter grid reliability is at risk due to soaring demand and fuel supply gaps. A recent Winter Reliability Assessment found that large areas of the continent face an elevated risk of electricity shortfalls during prolonged, wide-area cold snaps. This poses a threat to power grids in regions such as the Maritimes, New England, and parts of the Southeast.
Read Full Article →

Key Takeaways

  • The NERC's Winter Reliability Assessment highlights regions at elevated risk of electricity shortfalls during extreme winter conditions, including areas with natural gas pipeline capacity constraints.
  • Soaring demand for electricity poses a significant challenge to power grids, particularly in regions already facing fuel supply gaps due to infrastructure constraints or other factors.
  • The assessment underscores the need for improved grid resilience and planning to mitigate the impact of prolonged, wide-area cold snaps on winter power reliability.

Technical papers from ArXiv - for readers interested in academic research

1

Toward Trustworthy Digital Twins in Agentic AI-based Wireless Network Optimization: Challenges, Solutions, and Opportunities

Summary

The article discusses the challenges and limitations of using agentic artificial intelligence (AI) with reinforcement learning (RL) for optimizing wireless networks, particularly in terms of exploration costs and potential risks in real-world deployments. To address these concerns, a unified digital twin (DT) evaluation framework is introduced to ensure trustworthy DTs, which focuses on task-centric assessments rather than traditional physical accuracy metrics. The article presents the framework's effectiveness in reducing training and testing costs without compromising deployment performance.
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Key Takeaways

  • Traditional methods of evaluating digital twins for wireless network optimization rely heavily on isolated physical accuracy metrics, such as channel similarities and user trajectory comparisons, but these may not accurately represent the real-world network.
  • A more holistic, task-centric evaluation framework is proposed to assess digital twins in agentic AI-based network optimization, which can help mitigate exploration costs and ensure reliable performance in real-world deployments.
  • The introduction of a unified DT evaluation framework has shown promise in reducing training and testing costs without compromising deployment performance, particularly through pre-filtering candidate digital twins.
2

Quantum-Enhanced Reinforcement Learning for Accelerating Newton-Raphson Convergence with Ising Machines: A Case Study for Power Flow Analysis

Summary

The article discusses the use of reinforcement learning (RL) to optimize the initialization of the Newton-Raphson method for solving power flow equations. A novel quantum-enhanced RL environment update mechanism is introduced to mitigate the computational cost of evaluating power system states, leading to significant improvements in convergence speed and robustness under different operating conditions.
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Key Takeaways

  • The use of reinforcement learning (RL) can optimize the initialization of the Newton-Raphson method for solving power flow equations, improving convergence speed.
  • A quantum-enhanced RL environment update mechanism is proposed to reduce the computational cost of evaluating power system states, enabling faster and more efficient optimization.
  • This approach shows significant improvements in convergence speed, reduction in NR iteration counts, and enhanced robustness under different operating conditions.
3

iRadioDiff: Physics-Informed Diffusion Model for Indoor Radio Map Construction and Localization

Summary

The article proposes iRadioDiff, a physics-informed diffusion model for constructing indoor radio maps and localizing signals. This framework addresses the challenges of building high-fidelity indoor radio maps by leveraging a sampling-free diffusion-based approach that incorporates material properties and multipath-critical priors. The model achieves state-of-the-art performance in indoor radio map construction and localization.
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Key Takeaways

  • iRadioDiff is a sampling-free diffusion-based framework for constructing indoor radio maps, addressing the limitations of existing methods.
  • The model incorporates physics-informed prompts encoded by material reflection and transmission coefficients to guide the generative process.
  • iRadioDiff achieves state-of-the-art performance in indoor radio map construction and localization, offering effective generalization across layouts and material configurations.