The BBC published a chart in early March 2015 listing the top 10 countries in the world in order of energy storage capacity. The information was provided by the US Department of Energy (DOE).
In order from the highest storage capacity: China, Japan, US, Spain, Germany, Italy, India, Switzerland, France and lastly, South Korea.
The list includes number of projects (currently operational as well as those under construction), and storage capacity in kW. In total, there were 599 projects and 3.55 GW of storage capacity calculated.
However, the top 3 countries dominate the charts, with China having 34,000KW in 98 facilities, Japan with 29,000KW in 84 facilities and the US with 29,000KW in 528 facilities. The other seven countries have fewer than 10,000KW of storage capacity.
The DOE tracked 5 different sources of energy in decreasing order of number of projects: Electro-chemical (633), pumped hydro storage (341), thermal storage (188), electro-mechanical (79) and hydrogen storage (9). Despite fewer number of projects, pumped hydro storage came in first for rated power, at a whopping 177,427MW compared to the next highest, thermal storage at only 3391 MW.
Source: Energy Storage World Forum
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14 June 2017