Energy Digest

Daily Summaries & Key Takeaways of Power & Energy Updates
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Last Updated: December 05, 2025 at 06:00 PM
19
News & Articles
4
Research Papers
1

World’s first high-power aluminum-ion battery system for energy storage

Summary

The article reports on the development of a high-power aluminum-ion battery system, marking the first time a complete aluminum-graphite-dual-ion battery system has been built and tested. The system demonstrates stability, fast response, and recyclability for next-generation grid applications using lithium-free technology. This breakthrough could enable cost-effective and non-flammable energy storage solutions.
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Key Takeaways

  • The aluminum-ion battery system uses easily obtainable active materials (aluminum and graphite) and natural graphite as the cathode material, achieving high energy densities of 160 Wh/kg and power densities exceeding 9 kW/kg.
  • The system has been tested to confirm its stability under realistic operational scenarios, demonstrating its potential for fast-response applications in grid management.
  • The aluminum-ion battery technology is considered a cost-effective, non-flammable alternative to traditional lithium-based batteries, offering recyclability and reducing environmental concerns.
2

Brazil adopts legal framework for battery storage

Summary

Brazil has adopted a new legal framework for battery storage, establishing guidelines for regulation, tax exemptions, and incentives to promote the development of battery energy storage systems (BESS). The law recognizes electricity storage as an independent entity and outlines its role in providing multiple services to the electrical system. This move is expected to support the growth of BESS in Brazil.
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Key Takeaways

  • Brazil has introduced a new legal framework for battery energy storage systems (BESS) under Law 15.296, regulating the industry's operation, tax exemptions, and incentives.
  • The law recognizes electricity storage as an independent entity to be regulated by Aneel, Brazil's electricity regulatory agency, alongside production, transmission, distribution, and commercialization activities.
  • The new framework aims to promote the development of BESS in Brazil, highlighting its role in providing multiple services to the electrical system, including power, ancillary services, and energy commercialization.
3

Keeping the smart grid cyber secure

Summary

The increasing adoption of smart grid technology worldwide is making the electricity network more vulnerable to cyber attacks. As the cumulative investment in power grids is forecasted to increase globally, especially in the Asia-Pacific region, cybersecurity measures are becoming crucial to prevent widespread damage and grid shutdowns. Cyber attacks against utilities have risen by 30% in 2024 compared to previous years.
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Key Takeaways

  • The increasing adoption of smart grid technology worldwide is making the electricity network more vulnerable to cyber attacks, posing a significant threat to grid security.
  • The cumulative investment in power grids is forecasted to increase globally, with the Asia-Pacific region leading the way, but this growth also brings new cybersecurity challenges.
  • Cyber attacks against utilities have surged by 30% in 2024 compared to previous years, highlighting the need for increased awareness and robust measures to thwart these threats.
4

The week in 5 numbers: Wind and solar are what’s for dinner

Summary

The article discusses various developments in the power and energy systems sector, including a potential antitrust investigation into Duke Energy and concerns over phantom data centers. Additionally, it highlights the growing importance of wind and solar energy sources. The Trump administration's actions suggest a shift towards increased scrutiny of market practices.
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Key Takeaways

  • The Trump administration is investigating Duke Energy, a "established monopolist", for potential antitrust violations.
  • The risk of phantom data centers has emerged as a concern in power markets, potentially leading to conflicts over capacity auctions.
  • Wind and solar energy sources are gaining prominence, with these alternatives being highlighted as key players in the sector's development.
5

Segway Christmas Holiday Sale drops EV prices by hundreds to lows from $150, EcoFlow expansion battery flash sale, more

Summary

The article highlights various holiday deals and sales on electric vehicles (EVs), energy storage, and related products. Segway's Christmas Holiday Sale offers discounts on popular EVs, including the ZT3 Pro All-Terrain Electric Scooter, while EcoFlow is running a Cyber Week flash sale with up to 62% savings on power stations and batteries. Additionally, Ride1Up is offering extended sales on e-bikes and extra batteries.
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Key Takeaways

  • Segway's Christmas Holiday Sale is offering hundreds of dollars in discounts on popular EVs, including the ZT3 Pro All-Terrain Electric Scooter.
  • EcoFlow's Cyber Week flash sale offers up to 62% savings on expanded DELTA 2 Max Power Station bundles and three battery bundles starting from $329.
  • Ride1Up's extended Cyber Monday Sale continues to offer discounts of up to $600 on e-bikes and extra batteries, starting from $195.
6

Idaho Utility Celebrates 125 Years, Brings New Peaker Plant Online

Summary

Idaho Falls Power, a utility company celebrating its 125-year history, has formally launched a new natural gas-fired peaking generation plant. This milestone marks an important moment in the company's history and indicates a significant expansion of its energy infrastructure. The launch of this peaker plant suggests a focus on increasing energy production to meet growing demand.
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Key Takeaways

  • Idaho Falls Power has launched a new natural gas-fired peaking generation plant, signaling a major expansion of its energy infrastructure.
  • This peaker plant is part of the company's efforts to increase energy production and meet growing demand in the region.
  • The launch marks a significant milestone in the company's 125-year history, highlighting its commitment to providing reliable energy services.
7

First utility-owned geothermal network to double in size with DOE funds

Summary

The U.S. Department of Energy has approved an $8.6 million grant to support the expansion of Eversource Energy's geothermal heating and cooling network, which is the nation's first utility-led system. This network currently serves a small area but will now double in size. The funding is expected to enable further development of the renewable energy source.
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Key Takeaways

  • The $8.6 million grant from the U.S. Department of Energy will support the expansion of Eversource Energy's geothermal heating and cooling network.
  • The project aims to double the size of the nation's first utility-led geothermal system, which currently serves a limited area.
  • The funding is expected to promote further development of renewable energy sources in the region.
8

4 questions utilities need to ask to drive grid modernization efforts

Summary

The article highlights the challenges utilities face in driving grid modernization efforts nationwide, while also noting that each organization's solution is tailored to their specific needs. The article provides guidance for utilities on what questions they should ask to address unique challenges and drive successful modernization efforts. By asking the right questions, utilities can develop effective strategies for integrating renewable energy sources into their grids.
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Key Takeaways

  • Utilities need to assess their current grid infrastructure and identify areas where modernization is most critical, such as upgrading transmission lines or implementing smart grid technologies.
  • A thorough understanding of customer needs and expectations is essential to inform modernization efforts and ensure that the resulting grid can effectively support the integration of renewable energy sources.
  • By asking questions like "What are our customers willing to pay for a more efficient grid?" and "How will we ensure grid resilience in the face of extreme weather events?", utilities can develop effective strategies for driving successful modernization efforts.
9

Virginia data centers must pay β€˜fair share,’ incoming lieutenant governor says

Summary

The incoming Lieutenant Governor of Virginia, Ghazala Hashmi, emphasizes the importance of data centers paying a "fair share" to the state's energy system. This statement suggests that there is a growing focus on ensuring that large data center operators contribute their fair share to the state's energy infrastructure and costs. The comment implies a shift in policy priorities towards sustainable energy development.
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Key Takeaways

  • Data centers operating in Virginia are expected to pay a "fair share" of their energy costs, implying a shift in how these facilities are regulated.
  • The incoming Lieutenant Governor sees an opportunity for building new energy infrastructure in the Commonwealth, suggesting a focus on renewable energy and sustainability.
  • Ghazala Hashmi's statement may signal a change in policy priorities towards ensuring that large data center operators contribute to the state's energy system, rather than solely relying on existing infrastructure.
10

Australia’s grid-forming battery storage pipeline extends to nearly a hundred projects, says AEMO

Summary

The article reports that Australia's grid-forming battery storage pipeline has expanded to nearly a hundred projects, highlighting the importance of battery energy storage systems (BESS) in maintaining system stability as renewable energy penetration increases. BESS equipped with grid-forming inverters play a crucial role in stabilizing the grid and ensuring reliable power supply. This development suggests a significant shift towards integrating more renewable energy sources into Australia's National Electricity Market.
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Key Takeaways

  • Battery energy storage systems (BESS) equipped with grid-forming inverters are becoming increasingly essential for maintaining system stability in Australia's National Electricity Market.
  • The expansion of the grid-forming battery storage pipeline indicates a growing recognition of the importance of stabilizing the grid as renewable energy penetration increases.
  • This development suggests that Australia is transitioning towards a more decentralized and flexible energy system, with BESS playing a key role in ensuring reliable power supply.
11

Alabama Power Approve Rate Freeze, Solar Power for Data Center

Summary

The Alabama Public Service Commission has approved a two-year rate freeze and the implementation of large solar power projects for a proposed data center in Alabama. This decision aims to reduce energy bills for Alabamians, who currently pay some of the highest energy rates in the nation. The data center is expected to utilize solar power, contributing to the state's clean energy goals.
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Key Takeaways

  • The Alabama Public Service Commission has approved a two-year rate freeze, which will keep energy rates stable until 2028.
  • The decision also includes large-scale solar power projects for a proposed data center in Alabama, aiming to reduce reliance on traditional energy sources.
  • The approval is an effort to address the high energy bills faced by Alabamians, who pay some of the highest energy rates in the country.
12

Georgia hashes out plan to let data centers build their own clean energy

Summary

The state of Georgia is considering a plan that would allow data centers to build their own clean energy, potentially speeding up the development of these power-hungry facilities. This move comes after big companies have been pushing for regulations changes to enable them to find and purchase new clean energy sources. The plan is being negotiated between regulators and utility Georgia Power.
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Key Takeaways

  • Big companies are pushing for a regulatory change that would allow data centers to build their own clean energy, which could lead to faster development of these facilities.
  • This move comes after years of lobbying by companies to find new clean energy sources to add to the grid.
  • The plan is being negotiated between regulators and utility Georgia Power, suggesting a collaborative effort to make the regulatory change a reality.
13

BrightNight and Cordelio close on 800MWh Washington state BESS

Summary

BrightNight and Cordelio Power have achieved financial close on their 200MW/800MWh Greenwater battery energy storage system (BESS) in Washington state, US. The project is expected to provide reliable and renewable energy to the local grid. This milestone marks a significant step forward for the development of large-scale BESS projects in North America.
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Key Takeaways

  • BrightNight and Cordelio Power have secured financial close on their 200MW/800MWh Greenwater BESS, demonstrating the growing momentum behind large-scale battery energy storage systems in the US.
  • The project's total capacity of 200MW makes it one of the largest BESS projects in North America, highlighting the increasing demand for renewable energy solutions and grid stability.
  • The financial close of this project is likely to pave the way for BrightNight and Cordelio Power to secure long-term power purchase agreements (PPAs) with major utilities or corporate customers, further solidifying their position in the market.
14

Endurans Solar launches transparent backsheet for utility-scale bifacial modules

Summary

Endurans Solar has launched a transparent backsheet for utility-scale bifacial modules, dubbed HP D15T, which is adhesive-free and fluorine-free. The backsheet has completed IEC certification and offers high moisture and hydrolysis resistance, making it suitable for up to 1500 V systems. This new backsheet aims to provide domestic module manufacturers with enhanced supply chain stability and strategic advantage in the US market.
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Key Takeaways

  • Endurans Solar's HP D15T transparent backsheet is adhesive-free and fluorine-free, meeting IEC certification standards.
  • The backsheet offers high moisture and hydrolysis resistance, making it suitable for up to 1500 V systems with a water vapor transmission rate of less than 1.3 g/mΒ²/d.
  • The HP D15T backsheet is designed to provide domestic module manufacturers with enhanced supply chain stability and strategic advantage in the US market, particularly for utility-scale bifacial projects targeting Inflation Reduction Act tax credits.
15

Sicily opens €246 million tender for solar, battery storage projects of any size under new EU-aligned programme

Summary

Sicily has launched a €246 million tender for solar and battery storage projects, as part of the Pr Fesr Sicilia 2021–2027 programme. The funding window is open to companies of any size and aligns with the European Union's Strategic Technologies for Europe Platform (STEP) notice. The measure supports the development of clean and resource-efficient technologies, including solar photovoltaic systems and battery storage.
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Key Takeaways

  • The tender offers €246 million in funding for solar and battery storage projects across Sicily, supported by the Pr Fesr Sicilia 2021–2027 programme.
  • The funding is open to companies of any size, including aggregated groups, research organizations, and international investors, with eligible activities including productive investments, industrial research, and technological innovation.
  • The measure aligns with the European Union's STEP notice, supporting clean and resource-efficient technologies such as solar photovoltaic systems, battery storage, and energy storage technologies.
16

ADS-TEC battery-buffered EV fast chargers put into ancillary services market in Austria

Summary

The article discusses a project by ADS-TEC Energy to integrate electric vehicle fast-chargers into the ancillary services market in Austria, which could provide a widely replicable model for similar initiatives. This integration aims to stabilize the grid and ensure a reliable energy supply. By leveraging battery-buffered EV fast chargers, ADS-TEC Energy hopes to make this solution more viable.
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Key Takeaways

  • The project aims to integrate electric vehicle fast-chargers into the ancillary services market in Austria, providing a new way to stabilize the grid and ensure energy reliability.
  • This initiative could potentially be widely replicated due to its innovative use of battery-buffered EV fast chargers, making it an attractive solution for other markets.
  • The integration of EV fast-chargers into ancillary services markets has the potential to support the increasing demand for renewable energy sources and reduce reliance on traditional power plants.
17

GreenSketch AI 3.0 fast tracks solar and battery install design and business

Summary

The article discusses the latest upgrade to GreenSketch AI 3.0, a free solar and battery design and installation business tool developed by OSW Group in Australia. The new version includes AI-powered features that simplify and accelerate workflows, allowing installers to automatically detect and refine real roofs for optimal installation suitability. The tool also provides 3D views and templates for battery installations, enabling installers to visualize and configure systems accurately.
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Key Takeaways

  • GreenSketch AI 3.0 has been upgraded with new AI-powered features that simplify and accelerate workflows for solar and battery design and installation businesses.
  • The tool now includes high-resolution imaging of neighborhoods and 3D views to optimize solar layouts, allowing installers to detect and refine real roofs for optimal installation suitability.
  • The platform also provides numerous home battery configuration templates to help installers visualize how an installation can work in the available space, enabling accurate planning and design.
18

TEP Wins Approval for Data Center Energy Supply Agreement

Summary

The Arizona Corporation Commission has approved a 286-MW energy supply agreement between Tucson Electric Power and the developer of an embattled data center project near Tucson. The agreement ensures that the developer, Beale Infrastructure Group, will have access to energy supplies from existing resources already planned by TEP, without requiring new dedicated resources. This approval also provides protections for ratepayers and allows TEP to spread fixed costs across more retail electric sales.
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Key Takeaways

  • Arizona regulators have approved a 286-MW energy supply agreement between Tucson Electric Power and the developer of the Project Blue data center, ensuring that the project will have access to energy supplies.
  • The agreement provides protections for ratepayers by including a minimum monthly charge and requiring Beale Infrastructure Group to give at least three years' notice to terminate the contract.
  • The approval allows TEP to spread fixed costs across more retail electric sales, reducing the need for potential rate increases.
19

Collaboration and Innovation in the U.S. Transmission Industry

Summary

The article discusses the need for modernization and expansion of the U.S. power grid, citing aging infrastructure and rising demand as major concerns. Collaboration and innovation are highlighted as key solutions to address these challenges. The ETS 2025 conference emphasized the importance of teamwork and strategic partnerships in driving positive change.
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Key Takeaways

  • The U.S. power grid is facing significant challenges due to aging infrastructure and rising demand, emphasizing the need for modernization and expansion.
  • Collaboration and innovation are identified as key solutions to address these challenges, requiring teamwork and strategic partnerships to drive positive change.
  • Strategic collaboration among stakeholders, including utilities, regulators, and industry experts, is crucial for developing effective solutions to meet the future energy needs of the U.S.

Technical papers from ArXiv - for readers interested in academic research

1

Adaptive Online Optimization for Microgrids with Renewable Energy Sources

Summary

The article proposes a novel adaptive online optimization algorithm for managing microgrids with high renewable energy penetration. The algorithm is designed to handle changes in the internal model and ensures efficient management of the grid by verifying constraints through projection onto the constraint set. Numerical results show promising performance compared to state-of-the-art alternatives.
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Key Takeaways

  • The proposed algorithm uses a control-based design that applies the internal model principle, and integrates a system identification routine to identify such an internal model.
  • The algorithm ensures efficient management of microgrids by verifying constraints through projection onto the constraint set, which helps in ensuring that the system operates within defined boundaries.
  • The adaptability of the proposed algorithm is enhanced compared to state-of-the-art alternatives, allowing it to effectively handle changes in the internal model and ensure optimal performance.
2

Counterfactual Explanations for Power System Optimisation

Summary

The article discusses the use of counterfactual explanations in power system optimization, particularly in solving complex optimization problems like DC Optimal Power Flow and Unit Commitment. The framework identifies minimum changes in input parameters that would have changed the optimal solution, allowing users to understand why certain generators were not dispatched or how constraints led to specific solutions. Leveraging historical data from previously solved instances can provide significant speed benefits and improve explanation accuracy.
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Key Takeaways

  • The use of counterfactual explanations can help identify the most important differences between real and expected market outcomes in power system optimization.
  • Leveraging historical data from previously solved instances can significantly improve computational efficiency in solving complex optimization problems like DC Optimal Power Flow and Unit Commitment.
  • Conventional methods may not be tractable for certain cases, but the proposed framework provides a way to derive explanations that were previously unattainable.
3

Small-Signal Stability Oriented Real-Time Operation of Power Systems with a High Penetration of Inverter-Based Resources

Summary

This study proposes a control strategy for modern power systems with high penetration of inverter-based resources (IBRs), aiming to ensure safe operation while guaranteeing small-signal stability. The proposed methodology consists of two stages: offline analysis and online feedback optimization. It evaluates the effectiveness of the method on an academic test case based on a modified IEEE 9-bus system.
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Key Takeaways

  • The study proposes a control strategy that combines offline analysis and online feedback optimization to ensure small-signal stability in power systems with high IBR penetration.
  • The methodology uses a damping-based stability index to evaluate operating conditions and drives the system toward an optimal point while maintaining a secure distance from instability regions.
  • The proposed strategy is evaluated on a modified IEEE 9-bus system, which replaces synchronous generators with IBRs operating under grid-following and grid-forming control modes.
4

Stability-Guaranteed Dual Kalman Filtering for Electrochemical Battery State Estimation

Summary

The article discusses the proposed Stability Guaranteed Dual Kalman Filtering (SG-DKF) method for estimating the state of electrochemical batteries, aiming to improve accuracy and stability in battery management. The SG-DKF approach addresses the challenges of divergence in traditional dual Kalman filtering by introducing a Lyapunov-based analysis and an adaptive dead-zone rule. This method achieves comparable accuracy to existing methods while reducing the RMSE of state of charge estimates.
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Key Takeaways

  • The proposed SG-DKF method is designed to address the limitations of traditional dual Kalman filtering, which can experience divergence under large initialization errors or model mismatch.
  • A key innovation of SG-DKF is the use of a Lyapunov-based analysis to establish a sufficient stability condition, leading to an adaptive dead-zone rule for parameter updates.
  • The application of SG-DKF to an electrochemical battery model results in significant improvements in state of charge estimation accuracy, reducing RMSE by over 45% under large initial state errors.