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Change of energy efficiency investment, R&D spending and patent filings related to energy efficiency, 2015-2023

Last updated 18 Jun 2025

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Sources

IEA analysis based on data from IEA (2024), World Energy Investment (https://www.iea.org/reports/world-energy-investment-2024); IEA (2024), Energy Technology RD&D Budgets (https://www.iea.org/data-and-statistics/data-product/energy-technology-rd-and-d-budget-database-2#energy-technology-rdd-budgets); WIPO (2025), Patentscope (https://patentscope.wipo.int/search/en/search.jsf).

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