Technology and assets · CISO

Solar and batteries in the CISO inventory.

A frozen August 2026 EIA record of solar photovoltaic and battery generators coded to the CISO balancing authority. Source-reported capacities and statuses, with unresolved evidence kept beside the figures.

Inventory as of: 31 August 2026
Source rows: 1,365
Valid unique keys: 1,364
Quarantined identity: 1 source row

This is preliminary reported inventory. It does not establish physical availability, metered CAISO fleet membership, usable battery energy or forecast performance.

Inspect a generator Read the two exceptions Download valid-key CSV

What EIA reports in this edition

All 1,365 source rows are counted here, including the quarantined solar row and flagged Moss Landing battery. Status categories stay separate. None is a real-time availability measure.

August 2026 CISO source-inventory rows and capacity by technology and source status, including quarantine
Technology	Status	Source rows	Nameplate MW	Nameplate energy MWh
Solar Photovoltaic	OP	1,050	24,879.0	Not reported
Solar Photovoltaic	OA	2	7.9	Not reported
Solar Photovoltaic	OS	3	3.1	Not reported
Solar Photovoltaic	SB	0	No rows	No rows
Batteries	OP	303	16,853.7	58,154.5
Batteries	OA	5	238.5	954.0
Batteries	OS	2	2.0	9.8
Batteries	SB	0	No rows	No rows

Inventory sums display one decimal. Solar OP includes the quarantined 1.5 MW row; its valid-key subset is 1,049 rows and 24,877.5 MW. No capacity has been silently recoded or subtracted. Solar energy-capacity blanks remain unknown, not zero.

OP

In service and in commercial operation.

OA

Out of service, expected to return in the next calendar year.

OS

Out of service, NOT expected to return in the next calendar year.

SB

Standby or backup, available but not normally used.

Inspect a reported generator

Search the 1,364 valid-key records. Status and capacities are EIA inventory values for August 2026. The unresolved TBD row is shown separately below and excluded from this selector.

Plant name, plant ID or generator ID

Technology

Source status

1,364 matching valid-key records.

Generator

Dynegy Moss Landing Power Plant Hybrid

Plant 260 · Generator BAT2 · CA · CISO · Batteries

Source status: (OP) Operating

Moss Landing source conflict: physical availability unknown. Read both sources below.

Nameplate power: 100 MW
Nameplate energy: 400 MWh
Net summer capacity: 100 MW
Net winter capacity: 100 MW
DC net capacity: Not reported
Physical availability: Unknown

Display rounds to three decimals; downloads retain source decimal strings. Nameplate energy is an inventory value, not usable energy or a runtime guarantee. Other records have not passed an exhaustive external availability audit.

Two exceptions stay attached to the record

Moss Landing: source status conflict

EIA Operating row 466 reports plant 260, generator BAT2, as OP, 100 MW and 400 MWh. Vistra’s filing for the period ended 30 June 2026, Note 9, says it determined not to return its Moss Landing 100 MW battery facility to service.

The operator filing does not name an EIA generator ID. Operator, plant and capacity support an apparent conflict; the exact unit crosswalk remains unconfirmed. This edition retains the EIA status and capacities, flags the conflict and leaves physical availability unknown.

The separate 300 MW closure and uncertain 350 MW restart are not resolved to EIA generator identities here. An unflagged row is not an externally verified availability statement.

Vistra Form 10-Q, Note 9 · EIA August workbook

Cloverdale Solar I: unresolved identity

EIA Operating row 16846 reports plant 58949, Cloverdale Solar I, with generator ID TBD, status OP and 1.5 MW nameplate capacity.

The original source row is retained in quarantine. It is included in source-inventory summaries and excluded from the valid-key selector, valid-key CSV and keyed joins. No generator ID is invented. The JSON export carries the quarantine separately.

Download quarantined row

Scope, units and dates

The filter is Operating sheet, Balancing Authority Code exactly CISO, and technology Solar Photovoltaic or Batteries. There is no state filter: the source cohort contains 1,308 California, 26 Nevada and 31 Arizona rows. EIA’s inventory covers generating units at plants with at least 1 MW combined nameplate capacity, not every rooftop system. Planned, retired, canceled and Puerto Rico sheets are outside scope.

Keys combine period, plant ID and generator ID. Generator IDs retain leading zeros. Nameplate, summer, winter and DC power fields are separate MW measures. Battery nameplate energy is MWh. The source code MWH identifies electricity used for storage and is not itself a numeric energy capacity.

All 310 battery rows report nameplate energy. All 1,055 solar energy cells remain null. DC net capacity is missing for 347 source rows; all unit-code cells are blank. No blank is converted to zero, and no battery runtime is calculated.

Inventory period: August 2026, as of 31 August.
Publisher release: 24 September 2026. Workbook Last-Modified: 23 September 2026, 22:24:21 UTC. File modification is not a documented data revision date.
Capture: 23 October 2026, 09:34:59 UTC. Capture time does not make the August inventory current-day operational evidence.
Revision and refresh: EIA’s preliminary monthly estimates can be corrected in later inventories without individual explanations. A publisher revision date for this edition is unknown. This is a static non-API workbook edition, with no automatic collector.

Source, attribution and downloads

Source: U.S. Energy Information Administration, Preliminary Monthly Electric Generator Inventory, August 2026 (24 September 2026). Numerical EIA information products may be reused with dated acknowledgment under EIA’s reuse terms. Protected third-party materials and the EIA logo are excluded from that general statement. No endorsement is implied.

Changes made: filtered one month, balancing-authority code and two technologies; preserved source values as decimal strings; separated the unresolved identity; added the documented conflict flag; and calculated status-specific inventory sums. Downloads retain unrounded stored digits, which do not imply measurement precision.

JSON + provenance Valid-key CSV Quarantine CSV Data dictionary Retained source projection

The retained projection contains the complete filtered cohort, not the original national workbook bytes. It records source sheet/row references and the original workbook hash. Release, population and revision policy · Generator status definitions, Table 4.

Workbook and projection fingerprints

Original workbook SHA-256: b4b70abb4c217e8e2658c3bde7608a3d530e86a81279ccc572ced82a200e9f1c
Retained projection SHA-256: 15d21bada5515cc8e86fae6ef91230e4c0a2acd19242212aacd037c561cac8dd

Technology and assets in the evidence puzzle. This is evidence for one inventory balancing-authority code and two technologies in one month. It does not complete coverage across all grids or resolve available fleet capacity.

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