Energy storage system (ESS) plays a significant role in increasing the reliabilityand the performance of electricity generation, transmission, and distribution.Because of its positive relevance to the electric grid, renewables, and grid security,many developed countries enhance their efforts to develop the ESS technologies.A comparative study on global ESS competitiveness helps researchers toidentify leading and lagging countries in ESS field while providing the key indicatorsto explain the differences. To develop a model index to measure the ESScompetitiveness, we, first, devises a competitiveness framework of categories andindicators based on theories of science and technology innovation. Second, weset up the model indexes, both theoretical and experimental, by conducting analytichierarchy process analysis and collecting experts’ review. Then, we measurethe ESS competitiveness of 11 OECD countries and China, and find that theUnited States is an outstanding first-runner in the ESS sector. China is the secondwhile Japan, Germany, and South Korea belong to the next competitivegroup. Research findings in this paper provide policy implications for ESS technologicaldevelopment and commercialization.
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