Monthly storage operation by plant

Period

2015-01–2024-12

One row is

published plant x report month, storage prime movers summed

Built from source rows of

plant x prime mover x energy source x report month

Evidence and method

reported · directPlant-scoped: the table lists every prime mover at plants that have storage; only storage prime movers (BA, PS, FW, CE, CP, ES) are storage operation. fuel_consumed_for_electricity_units = MWh charged or pumped; gross_generation_mwh = MWh discharged; net = gross minus charged, signed

Origin

U.S. EIA Form 923 Schedule 3 Part B (energy storage: MWh charged, gross MWh discharged, net MWh) monthly ↗Source notice and licenceLicence: CC-BY-4.0

Built from source rows of

generator x report_date (annual)

Evidence and method

reported · derived

Origin

U.S. EIA Form 860 (mix of EIA forms, harvested) ↗Source notice and licenceLicence: CC-BY-4.0

Edition in this release

PUDL v2026.9.0 (embedded 2026.8.1.dev50) · out_eia__yearly_generators · retrieved 2026-09-29PUDL v2026.9.0 (embedded 2026.8.1.dev50) · core_eia923__monthly_energy_storage · retrieved 2026-09-29

Download

storage_operation_plant_month.parquet ↓672 rows · 7 KB

• Eligible plantspublished plants with a storage generator in the inventory year (prime movers BA, PS, FW, CE, CP, ES)
  45 plants
• Listed in 202434 plants eligible and not listed
  11 of 45 plants24.4% of eligible

• Listed without a reported value · chargedRows with no value for this measure; published as null, never zero
  0 plant-months
• Listed without a reported value · dischargedRows with no value for this measure; published as null, never zero
  0 plant-months
• Listed without a reported value · netRows with no value for this measure; published as null, never zero
  0 plant-months
• No row in the sourceMonths of the inventory year with no EIA-923 storage row for a plant the inventory lists with a storage generator. Earlier years are set against nothing: the inventory is one snapshot and cannot say which plants existed then: 2024
  440 plant-months
• Outside the atlas frameEIA-923 storage rows in the window for plants outside the frame authorities and the core states
  31,071 source rows
• In the source, not yet includedEIA-923 storage rows for published plants in years outside the window: present in the source edition, not yet included: 2014, 2025–2026
  273 source rows

Publisher

EIA releases Form EIA-923 data monthly, and once a year as final annual data.www.eia.gov/electricity/data/eia923/ ↗

Delay

On the checked date EIA's latest monthly release, dated August 26, 2026, carried June 2026 data; final 2025 annual data was released September 14, 2026, and the next annual release was listed as September 2027 for 2026 final data.www.eia.gov/electricity/data/eia923/ ↗

This atlas

The atlas reads EIA-923 through PUDL, which Catalyst Cooperative publishes as quarterly versioned releases. Each atlas release pins one PUDL version, named under edition; the table changes only when that pin moves. No timed refresh.docs.catalyst.coop/pudl/en/v2026.9.0/data_access.html ↗

• storage.operation_prime_movers_only{"non_storage_rows":0}
  Passed
• storage.net_sign_not_forced{"plant_years_with_positive_net":11}
  Passed
• storage.group_from_prime_mover{"mismatched_generators":0}
  Passed

No corrections apply to this dataset in this release. Earlier editions: not available (earlier releases did not retain per-dataset edition comparisons).