1. REmap: roadmap for a renewable energy future,2016
2. Tracking clean energy progress 2015,2016
3. Office of Electricity Delivery & Energy Reliability. DOE Global Energy Storage Database; 2017. 〈http://www.energystorageexchange.org/〉 [Accessed 20 January 2017].
4. Wilkinson S. Grid-connected energy storage report. Englewood; 2015.
5. Zahurancik J. Grid Batteries set to be Bigger than Pumped Hydro in 10 Years. Arlington; 2014.