Tracking Clean Energy Progress

The IEA’s Tracking Clean Energy Progress (TCEP) has been transformed this year into a digital platform that includes an easy-to-navigate interface with the most-timely information. Data will be updated throughout the year as new information becomes available, and will be complemented by cutting-edge analysis and commentary on notable developments on the global clean energy transition. This means that users will always know they are receiving the very latest information and analysis available.

What’s new for TCEP-2018?

TCEP is now using the IEA’s Sustainable Development Scenario (SDS) to benchmark progress. The SDS was first modelled in the World Energy Outlook 2017, and provides a pathway to keeping global average temperatures to “well below 2C,” reducing air pollution, and increasing energy access. Progress is also tracked against milestones identified in the IEA’s Technology Roadmaps series to assess whether technologies, energy savings and emissions reduction measures are on track to achieve the longer-term SDS objectives.

The new TCEP also undertakes a major enhancement of technology innovation tracking (public and private) and includes a new Innovation Framework that identifies over 100 key innovation gaps across nearly 40 technologies, identifying barriers that need to be overcome for these technologies to reach their full potential.

TCEP also includes a “ones to watch” label that identifies those technologies that deserve an especially close look, including those that the IEA is engaging in more detailed analysis of our own.

For the first time, TCEP includes cutting-edge analysis of high-level indicators that provide an overall assessment of clean energy trends across sectors. These indicators highlight the most important actions needed for the complex energy sector transformations and will help policymakers implement short-term actions that are better aligned with long-term goals.


Since 2011, TCEP has provided an annual and rigorous analysis of the status of global clean-energy transitions across a wide range of technologies and sectors, including recent progress, deployment rates, investment levels, and technology innovations.

For each technology, TCEP examines recent sectoral trends, the latest developments and current policy ambition to determine progress against meeting low‑carbon technology development pathways. The ultimate evaluation of whether a technology or sector is on track (green), needs further improvement (orange) or is not on track (red), is based on a wide variety of quantitative data and analysis as well as expert judgment. To examine recent trends, TCEP uses the combination of IEA statistics up to the latest available year, recent energy market analysis as well as estimates of latest trends in energy and emissions. Recent trends are also examined with reference to technology penetration, market creation and technology development.

  • Technology penetration. What is the current rate of technology deployment? What share of the overall energy mix does the technology represent?
  • Market creation. What mechanisms are in place to enable and encourage technology deployment, including government policies and regulations? Where relevant, what is the level of private-sector involvement in technology progress through deployment?
  • Technology development. Are technology reliability, efficiency and cost evolving, and if so, at what rate? What is the level of public and private investment for technology RD&D?

TCEP is a cross-agency effort drawing in analysis from all parts of the IEA, including experts focusing on energy modelling, market analysis, investment and statistics. It is also supported by the IEA’s extensive global technology network, totalling 6000 researchers across nearly 40 technology collaboration programmes, and a broad range of external stakeholders to obtain the best expertise in the field.