Fact Sheet | Energy Storage (2019) | White Papers
Lead-acid battery. 100. 1 min – 8h. 6 – 40 years. 50 – 80. 80 – 90%. Flow battery. 100. hours. 12,000 – 14,000. 20 – 70. 60 – 85%. Hydrogen. 100. mins – week. With compressed air storage, air is pumped into an underground hole, most likely a salt cavern, during off-peak hours when electricity is cheaper. When energy is