The costs of utility scale battery storage in the United States fell about 70% between 2015 and 2018, according to data compiled by the Energy Information Administration (EIA), a part of the Department of Energy.
The average energy capacity cost of utility-scale battery storage went from $2,152 per kilowatt hour (kWh) in 2015 to $625/kWh in 2018, according to the EIA. The agency noted, however, that costs vary widely by region and by application.
Regionally, average utility scale battery costs between 2013 and 2018 ranged from $1,946/kWh in the PJM Interconnection to as low as $947/kWh in Hawaii. And in California, which had the most battery capacity of any state in 2019, average battery storage cost was $1,522/kWh…
