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539 documents from Ember
Ember’s response to India’s draft National Electricity Policy- 2026
Ember's response to India's draft National Electricity Policy 2026 argues for a shift from sequential to co-optimised generation and transmission planning to resolve bottlenecks and stranded assets. The brief recommends deploying grid-enhancing technologies to manage the rise of inverter-based resources, unbundling state transmission utilities to increase private sector participation, and reforming DISCOM procurement to avoid over-reliance on long-term coal contracts. It also calls for a robust data-sharing and cybersecurity framework to manage the increasing volume of electricity data from distributed energy resources.
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Document type: Policy brief
EU coal mines still vent methane: satellite findings from Poland
A satellite-based analysis by Ember reveals that Polish coal mines were the most frequent fossil fuel methane super-emitters in the EU in 2025. Despite a ban on routine venting from drainage systems that took effect in January 2025 under the EU Methane Regulation, five Polish drainage systems were observed venting methane. The report highlights a critical gap in enforcement, noting that Poland has not established the required national penalty framework. Coking coal mines were responsible for the vast majority of super-emitter events, and the analysis suggests that captured drainage methane could have provided significant heating energy for Polish households.
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Document type: Report
From baseload to flexibility: How is coal’s role in China changing
China is repositioning its coal fleet to provide system flexibility, with the entire existing fleet on track to be retrofitted by 2027. While technical capacity is increasing, the report argues that full flexibility is constrained by power market design and dispatch practices. It emphasizes that as coal retrofit potential plateaus, the rapid scale-up of clean flexibility, particularly battery energy storage, is essential to avoid locking in emissions beyond 2030 and to maintain grid stability as renewables become dominant.
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Document type: Report
Setting the Scene - Coal flexibility in China: context, drivers, and policy evolution
China is repositioning its coal fleet to serve as a regulatory and security resource to manage the variability of its growing renewable energy sector. This transition is driven by a critical need for short-term flexibility, with the IEA estimating that these needs will be three times higher in 2030 than in 2022. To achieve this, the Chinese government has implemented a series of Five-Year Plans and policies, including a target to retrofit "above 200 GW" of coal capacity for flexibility between 2021 and 2025. Technical efforts focus on lowering minimum loads (ML) to 25-40% of rated capacity and decoupling heat and electricity generation in combined heat and power (CHP) units. Financial mechanisms supporting this shift include a coal capacity pricing mechanism introduced in 2024 and the use of infrastructure real estate investment trusts (REITs) for eligible plants.
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Document type: Report
Discussion - Unleashing coal’s flexible potential while easing the transition to cleaner solutions
China is shifting its power system flexibility from coal retrofits to clean alternatives like battery energy storage. While coal retrofits are nearing exhaustion by 2027, the document argues that market reforms and updated dispatch practices are essential to prevent a reliance on new coal capacity and to meet 2030 emission goals.
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Document type: Report
Measuring the Impact - China’s coal fleet is becoming more flexible, but much of its potential remains untapped
China has rapidly expanded its flexible coal power capacity, exceeding its 2025 national target and positioning itself to meet a 2027 goal of retrofitting 500-700 GW. By the end of 2024, total flexible coal capacity exceeded 600 GW, with significant progress in provinces like Guangxi, Inner Mongolia, Shanxi, and Xinjiang. While coal utilisation is generally declining and showing greater seasonal variability due to renewable growth and demand peaks, the document notes that the full potential of this technical flexibility is not yet reflected in system operations due to market design and institutional arrangements. The transition is supported by a capacity pricing mechanism and diversified revenue models, though flexible operation increases costs through higher maintenance, reduced fuel efficiency at low loads, and accelerated depreciation.
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Document type: Report
Hot stuff: geothermal energy in Europe
The report highlights that 'next generation geothermal' technologies, such as Enhanced Geothermal Systems (EGS), have expanded the geographic viability of geothermal power beyond volcanic regions. In the EU, approximately 43 GW of capacity could be developed at costs below 100 €/MWh, potentially generating 301 TWh of electricity annually. While Europe has a strong historical foundation in geothermal energy, the report warns that the EU risks losing its leadership to the US and Canada due to slow permitting and a lack of coordinated policy frameworks. It also notes geothermal's potential to meet the rising energy demands of AI data centres and its ability to provide firm, low-carbon power and mineral recovery, such as lithium.
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Document type: Report
Türkiye ranks fourth in Europe in electric car sales
In 2025, Türkiye became Europe's fourth-largest market for new battery electric vehicles (BEVs), with sales reaching approximately 190,000 units. This growth saw the BEV share of new car sales rise to 17%, matching the European Union average for the first time. Despite this momentum, BEVs represent only 2.1% of all registered cars in Türkiye, and gasoline consumption increased by 16% in the first 11 months of 2025. The report highlights that while domestic production and tax-compatible models drove growth, high overall tax burdens and exchange rate fluctuations remain challenges to further reducing energy imports.
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Document type: Report
Leveraging global capital towards clean energy as ASEAN races to the Summit
ASEAN requires an estimated US$281 billion annually by 2035 for its energy transition, necessitating a strategic blend of bilateral financing from China, Japan, and the US. While China provides scale and speed through asset-led infrastructure, Japan focuses on system-level upgrades and concessionality, and the US employs blended finance to mobilise private capital. The report argues that ASEAN countries are transitioning from being mere deployment markets to becoming manufacturing hubs for EVs, solar PV, and critical minerals. It recommends that the 2026 ASEAN Summit be used to align these national industrial strategies into coordinated regional value chains to avoid duplication and attract diverse global capital.
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Document type: Policy brief
Curtailing renewables to provide flexibility is an inefficient system response
Between May and December 2025, India's system operator curtailed an estimated 2.3 TWh of solar energy, resulting in approximately 2.11 million tonnes of missed CO2 emission reductions. While generators are compensated for this loss, the costs are passed to consumers, and the practice wastes the value of clean energy assets. With solar capacity reaching 135.8 GW in 2025 and growing faster than demand, the report warns that curtailment could become routine unless system flexibility—such as battery storage—is accelerated to keep pace with capacity additions.
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Document type: Report
Structural and operational factors of renewable energy curtailment in India in 2025
In 2025, India's renewable energy curtailment was primarily driven by transmission infrastructure mismatches and system-wide emergency conditions managed via Tertiary Reserve Ancillary Services (TRAS). While non-fossil fuel capacity reached 266.7 GW by December 2025, the gap between rapid project deployment and slower transmission construction led to significant energy loss, particularly for projects under temporary general network access (T-GNA). Emergency TRAS-down events, often triggered by demand forecasting errors, also caused notable curtailment, such as 93.3 GWh of solar output on 12 October 2025.
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Document type: Report
Building flexibility is central to accommodating increasing solar
India needs to build system flexibility to absorb high and variable renewable generation, moving beyond simple capacity additions. The report identifies three primary levers: improving the flexibility of the coal fleet by lowering minimum technical limits, scaling energy storage (BESS and pumped hydro), and accelerating demand-side flexibility through smart meter deployment and attractive time-of-day tariffs.
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Document type: Report
2025 saw significant solar curtailment to preserve system stability
In 2025, India experienced significant solar curtailment, estimated at 2.3 TWh between late May and December, primarily due to the inability of the coal fleet to ramp down sufficiently during periods of low daytime demand. This was exacerbated by weaker-than-forecast demand growth in 2025, driven by mild temperatures and increased behind-the-meter solar generation. The report highlights that while operational errors in forecasting contributed to the issue, the structural lack of flexibility in coal plants—many of which must operate above a minimum thermal load of 55%—creates a systemic challenge as solar capacity continues to grow faster than demand.
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Document type: Report
Early signs of the impact of batteries
In 2025, EU wholesale electricity prices rose in 21 countries, driven by spikes during peak gas-use hours. Grid-scale battery capacity in the EU exceeded 10 GW in 2025, more than double the 4 GW recorded in 2023. A pipeline of projects in Germany, Poland, and Italy could push capacity beyond 40 GW, potentially displacing costly gas generation and reducing the waste of curtailed wind and solar power.
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Document type: Report
2025 at a glance
In 2025, the EU power sector reached a tipping point as wind and solar generated 30.1% of electricity, surpassing all fossil fuel sources at 29.0%. Solar generation hit a record 369 TWh, growing by 20.1% over 2024, while coal fell to a historic low of 9.2% of the mix. Despite a slight increase in gas power generation and associated import costs, renewables provided nearly half of the EU's electricity (47.7%), with solar output helping to offset low wind and hydro production caused by unusual weather in early 2025.
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Document type: Report
European Electricity Review
In 2025, the EU reached a milestone where wind and solar generated more electricity (30.1%) than all fossil fuel sources (29.0%) for the first time on record. Solar generation grew by 20.1% to reach a record 369 TWh, while coal fell to a historic low of 9.2% of the mix. Despite this, gas generation rose by 8% due to low hydro output, increasing the EU power sector's gas import bill by 16% to €32 billion. The report highlights the role of a growing battery pipeline—exceeding 10 GW of large batteries in 2025—in reducing reliance on expensive gas and mitigating the curtailment of clean power, particularly in Germany.
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Document type: Report
Indian States’ Electricity Transition (SET) 2026
The SET 2026 report assesses 21 Indian states on their electricity transition, finding that progress is fragmented and that leadership in one area, such as decarbonisation, does not automatically ensure system-wide readiness. While states like Karnataka and Himachal Pradesh lead in decarbonisation, and Delhi and Haryana excel in power ecosystem readiness, most states face structural gaps in areas like smart metering, energy storage, and DISCOM financial health. The report emphasizes the need for coordinated state-level interventions to align capacity additions with grid readiness and market-enabling policies.
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Document type: Report
Highlights of the global energy transition in 2025
In 2025, solar and wind power expanded fast enough to outpace global electricity demand growth for the first time over a sustained period. Solar growth accelerated in Africa and Central Europe, while BRICS nations now generate over half of global solar power. The rise of 'electrotech'—led by China—and falling battery costs are enabling fossil-free baseload power and supporting the energy demands of AI and data centres.
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Document type: Report
Plugging heat in: smart policy can help electrify household heating in Europe
The report argues that high electricity prices, often inflated by policy-related levies, make heat pumps less cost-competitive than gas boilers despite their superior efficiency. It analyzes various policy levers—such as removing levies, reducing VAT, or implementing innovative tariffs—to lower the electricity-to-gas price ratio, which the European Heat Pump Association suggests should be no higher than 2 for competitiveness. The analysis highlights that the Netherlands, with the lowest price ratio (1.4), has significantly higher heat pump sales than countries like Germany, Poland, or Hungary, where ratios exceed 3.
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Document type: Report
The EV leapfrog - how emerging markets are driving a global EV boom
In 2025, electric vehicles (EVs) accounted for over a quarter of global new car sales, driven by a significant shift in emerging markets. While legacy auto markets in the US and Canada have seen a rollback of incentives, countries in Southeast Asia and Latin America are 'leapfrogging' advanced economies. Viet Nam and Singapore have reached EV sales shares exceeding 40%, surpassing the UK and EU. China continues to dominate as the largest market, with its exports increasingly targeting non-OECD markets such as Brazil, Mexico, the UAE, and Indonesia. The report highlights that EVs significantly reduce fossil fuel demand, with battery electric vehicles in Brazil delivering an estimated 90% reduction compared to internal combustion engine vehicles.
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Document type: Report