1. Trends in storage can be found at: (1) EIA U.S. Battery Storage Trends, May (2018). www.EIA.gov; (2) Lazard Levelized Cost of Storage Analysis, Nov, 2018; (3) Electricity Storage and Renewables: Costs and Markets To 2030, IRENA, International Research Energy Agency (2017).
2. The French utility Electricite de France has announced a plan with a goal to develop 10 gigawatts of storage around the world by 2035, with an investment of about $10 billion between 2018 and 2035.
3. At location 34.7145, −102.1240, ERCOT 2012 load data set reference, scaled to 300 MW. https://www.nrel.gov/gis/data-wind.html. For this location in 2012, the average capacity factors for wind and solar were 29.5% and 47.2%, respectively, giving a LCOE of 3.1 ¢/kWh and 2.9 ¢/kWh for solar and wind at their respective capacity factors.