What barriers and / or obstacles have prevented large, utility scale electricity energy storage systems from being installed in California and the nation? (energy.ca.gov)
Lets See, Texas has rolling brown outs and needs to buy electricity energy from Mexico (its not tied into the national grid so it can avoid federal reg); it has water shortages; and has severe gridlock. (religion.blogs.cnn.com)
heating - fuels consumer - products natural - gas oil34 electricity energy - information - administration (energytomorrow.org)