Electric energy storage is becoming more important to the energy industry as the share of intermittent generating technologies, such as wind and solar, in the electricity mix increases. Electric energy storage helps to meet fluctuating demand, which is why it is often paired with intermittent sources. Storage technologies include batteries and pumped-storage hydropower, which capture energy and store it for later use. Storage metrics can help us understand the value of the technology. Round-trip efficiency is the percentage of electricity put into storage that is later retrieved. The higher the round-trip efficiency, the less energy is lost in the storage process. According to data from the U.S. Energy Information Administration (EIA), in 2019, the U.S. utility-scale battery fleet operated with an average monthly round-trip efficiency of 82%, and pumped-storage facilities operated with an average monthly round-trip efficiency of 79%. More ›
Source: EIA, Power Plant Operations Report
2/11/2021: $58.24/barrel
up$2.01 from week earlier
up$7.07 from year earlier
2/11/2021: $2.868/MMBtu
down$0.067 from week earlier
up$1.024 from year earlier
2/6/2021: 10.886 million tons
down0.256 million tons from week earlier
down0.835 million tons from year earlier
2/5/2021: 2,518 Bcf
down171 Bcf from week earlier
down9 Bcf from year earlier
2/5/2021: 469.0 million barrels
down6.6 million barrels from week earlier
up26.5 million barrels from year earlier