CAISO Interconnection Queue

Get CAISO interconnection queue data

curl --request GET \
  --url https://api.cleanview.co/api/v1/interconnection/caiso \
  --header 'x-api-key: <api-key>'

{
  "iso": "CAISO",
  "summary": {
    "limit": 50,
    "offset": 0,
    "total_results": 3027,
    "has_more": true,
    "current_page": 1,
    "total_pages": 61
  },
  "filters": {
    "state": null,
    "technology": null,
    "status": null,
    "min_capacity": null,
    "max_capacity": null,
    "developer": null
  },
  "data": [
    {
      "iso": "CISO",
      "queue_id": "1000_combined_cycle",
      "project_name": "Heca Scs",
      "capacity_mw": 300,
      "technology": "Combined Cycle",
      "technology_normalized": "Natural Gas",
      "fuel": "Other",
      "status": "Cancelled",
      "detailed_status": "Withdrawn",
      "operating_date": "2019-01-01T00:00:00.000Z",
      "request_date": "2013-05-01T00:00:00.000Z",
      "state": "CA",
      "county": "Kern",
      "queue_position": "1000",
      "interconnecting_entity": null,
      "developer": "NextEra Energy Resources",
      "feasibility_study_status": null,
      "system_impact_study_status": "Complete",
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Full Capacity",
      "voltage_kv": null,
      "station_transmission_line": "Midway-Wheeler Ridge 230 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    },
    {
      "iso": "CISO",
      "queue_id": "54571_storage",
      "project_name": "Borderline Solar",
      "capacity_mw": 150,
      "technology": "Battery",
      "technology_normalized": "Battery",
      "fuel": "Battery",
      "status": "Planned",
      "detailed_status": "Active",
      "operating_date": "2026-06-01T00:00:00.000Z",
      "request_date": "2024-02-15T00:00:00.000Z",
      "state": "CA",
      "county": "Riverside",
      "queue_position": null,
      "interconnecting_entity": null,
      "developer": "Terra-Gen",
      "feasibility_study_status": "In Progress",
      "system_impact_study_status": null,
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Energy Only",
      "voltage_kv": 230,
      "station_transmission_line": "Devers-Palo Verde 500 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    }
  ]
}

GET

interconnection

caiso

Get CAISO interconnection queue data

curl --request GET \
  --url https://api.cleanview.co/api/v1/interconnection/caiso \
  --header 'x-api-key: <api-key>'

{
  "iso": "CAISO",
  "summary": {
    "limit": 50,
    "offset": 0,
    "total_results": 3027,
    "has_more": true,
    "current_page": 1,
    "total_pages": 61
  },
  "filters": {
    "state": null,
    "technology": null,
    "status": null,
    "min_capacity": null,
    "max_capacity": null,
    "developer": null
  },
  "data": [
    {
      "iso": "CISO",
      "queue_id": "1000_combined_cycle",
      "project_name": "Heca Scs",
      "capacity_mw": 300,
      "technology": "Combined Cycle",
      "technology_normalized": "Natural Gas",
      "fuel": "Other",
      "status": "Cancelled",
      "detailed_status": "Withdrawn",
      "operating_date": "2019-01-01T00:00:00.000Z",
      "request_date": "2013-05-01T00:00:00.000Z",
      "state": "CA",
      "county": "Kern",
      "queue_position": "1000",
      "interconnecting_entity": null,
      "developer": "NextEra Energy Resources",
      "feasibility_study_status": null,
      "system_impact_study_status": "Complete",
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Full Capacity",
      "voltage_kv": null,
      "station_transmission_line": "Midway-Wheeler Ridge 230 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    },
    {
      "iso": "CISO",
      "queue_id": "54571_storage",
      "project_name": "Borderline Solar",
      "capacity_mw": 150,
      "technology": "Battery",
      "technology_normalized": "Battery",
      "fuel": "Battery",
      "status": "Planned",
      "detailed_status": "Active",
      "operating_date": "2026-06-01T00:00:00.000Z",
      "request_date": "2024-02-15T00:00:00.000Z",
      "state": "CA",
      "county": "Riverside",
      "queue_position": null,
      "interconnecting_entity": null,
      "developer": "Terra-Gen",
      "feasibility_study_status": "In Progress",
      "system_impact_study_status": null,
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Energy Only",
      "voltage_kv": 230,
      "station_transmission_line": "Devers-Palo Verde 500 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    }
  ]
}

Overview

The CAISO interconnection queue endpoint provides access to real-time data from the California Independent System Operator (CAISO) interconnection queue, which serves most of California and parts of Nevada.

CAISO Coverage: Contains 3,027 projects across California (89%), Nevada (5%), Arizona (4%), and Mexico (1%). Top technologies: Solar (1,200+ projects), Battery Storage (1,100+ projects), Wind (300+ projects).

Hybrid Projects: CAISO represents hybrid projects (e.g., solar + storage) as single rows in their Excel source files with multiple technology columns. Our API splits these into separate records for each technology component. See our comprehensive guide on hybrid project handling for details.

Endpoint

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?limit=50"

Query Parameters

Parameter	Type	Default	Description
`limit`	integer	1000	Number of records to return (50-5000)
`offset`	integer	0	Number of records to skip
`state`	string	-	Filter by state code (CA, NV, AZ) - supports comma-separated
`technology`	string	-	Filter by standardized technology type - supports comma-separated
`status`	string	-	Filter by standardized status
`min_capacity`	number	-	Minimum capacity in MW
`max_capacity`	number	-	Maximum capacity in MW
`developer`	string	-	Filter by developer name (supports partial matches)

Technology Options

Use standardized technology names for consistent filtering. See our Interconnection Reference for all available options.

CAISO Technology Field Mapping: CAISO represents technology information differently from other ISOs. When filtering by technology=Solar, the API searches both the technology field (which contains CAISO’s original terms like “Photovoltaic”) and the fuel field (which contains “Solar”). This ensures consistent cross-ISO filtering while preserving CAISO’s original data structure.Example: A CAISO solar project returns:

technology: “Photovoltaic” (CAISO’s original term)
fuel: “Solar” (standardized term)
Both fields are searched when using technology=Solar filter

Technology	Count	Description
`Solar`	1,200+	Solar photovoltaic projects (searches both `technology` and `fuel` fields)
`Battery`	1,100+	Battery energy storage systems
`Wind`	300+	Wind turbine projects
`Natural Gas`	180+	Natural gas generation
`Other`	200+	Other technologies

Status Options

Status	Count	Description
`Planned`	1,800+	Active projects in queue
`Operating`	800+	Commercial operation achieved
`Cancelled`	400+	Withdrawn or terminated

Example Requests

Get Active Solar Projects in California

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Solar&status=Planned&state=CA&limit=50"

Returns active solar projects in the CAISO queue. Uses technology=Solar for standardized filtering.

Get Large Battery Storage Projects (>100 MW)

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Battery&min_capacity=100&limit=50"

Finds large-scale battery storage projects. Uses technology=Battery for energy storage systems.

Get Wind Projects

Get Projects by Multiple Technologies

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?technology=Solar,Wind,Battery&limit=50"

Uses comma-separated values for multiple technology filtering.

Get NextEra Energy Projects

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?developer=NextEra&limit=50"

Filters for projects developed by NextEra Energy. Uses partial matching, so “NextEra” matches “NextEra Energy Resources”.

Get Projects Without Developer Information

curl -H "x-api-key: your_api_key_here" \
  "https://api.cleanview.co/api/v1/interconnection/caiso?developer=null&limit=50"

Returns only projects that don’t have developer information mapped in Cleanview’s database.

Response Schema

{
  "iso": "CAISO",
  "summary": {
    "limit": 50,
    "offset": 0,
    "total_results": 3027,
    "has_more": true,
    "current_page": 1,
    "total_pages": 61
  },
  "filters": {
    "state": null,
    "technology": null,
    "status": null,
    "min_capacity": null,
    "max_capacity": null,
    "developer": null
  },
  "data": [
    {
      "iso": "CISO",
      "queue_id": "1000_combined_cycle",
      "project_name": "Heca Scs",
      "capacity_mw": 300,
      "technology": "Combined Cycle",
      "technology_normalized": "Natural Gas",
      "fuel": "Other",
      "status": "Cancelled",
      "detailed_status": "Withdrawn",
      "operating_date": "2019-01-01T00:00:00.000Z",
      "request_date": "2013-05-01T00:00:00.000Z",
      "state": "CA",
      "county": "Kern",
      "queue_position": "1000",
      "interconnecting_entity": null,
      "developer": "NextEra Energy Resources",
      "feasibility_study_status": null,
      "system_impact_study_status": "Complete",
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Full Capacity",
      "voltage_kv": null,
      "station_transmission_line": "Midway-Wheeler Ridge 230 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    },
    {
      "iso": "CISO",
      "queue_id": "54571_storage",
      "project_name": "Borderline Solar",
      "capacity_mw": 150,
      "technology": "Battery",
      "technology_normalized": "Battery",
      "fuel": "Battery",
      "status": "Planned",
      "detailed_status": "Active",
      "operating_date": "2026-06-01T00:00:00.000Z",
      "request_date": "2024-02-15T00:00:00.000Z",
      "state": "CA",
      "county": "Riverside",
      "queue_position": null,
      "interconnecting_entity": null,
      "developer": "Terra-Gen",
      "feasibility_study_status": "In Progress",
      "system_impact_study_status": null,
      "facilities_study_status": null,
      "optional_study_status": null,
      "interconnection_agreement_status": null,
      "deliverability_status": "Energy Only",
      "voltage_kv": 230,
      "station_transmission_line": "Devers-Palo Verde 500 kV Line",
      "study_area": null,
      "balancing_authority_code": "CISO"
    }
  ]
}

Response Fields

Core Fields (Always Present)

Field	Type	Description
`iso`	string	Always “CISO” for CAISO data
`queue_id`	string	Unique CAISO queue identifier (e.g., “1379_photovoltaic”)
`project_name`	string	Project name (always available for CAISO)
`capacity_mw`	number	Project capacity in MW
`technology`	string	Standardized technology type
`status`	string	Standardized status (Planned, Operating, Cancelled)
`queue_position`	string	Queue position number (null for projects without assigned queue positions)
`balancing_authority_code`	string	Always “CISO”

Location & Timing

Field	Type	Description
`state`	string	State code (CA=89%, NV=5%, AZ=4%, MX=1%)
`county`	string	County name where project is located
`operating_date`	date	Expected/actual commercial operation date
`request_date`	date	Date project entered queue

Technology & Fuel

Field	Type	Description
`technology_normalized`	string	Same as `technology` for consistency
`fuel`	string	Fuel type (Solar, Wind Turbine, Battery, etc.)

Study Process (CAISO-Specific)

Field	Type	Description
`feasibility_study_status`	string	Feasibility study completion status
`system_impact_study_status`	string	System impact study status
`facilities_study_status`	string	Facilities study completion status
`optional_study_status`	string	Optional study status
`interconnection_agreement_status`	string	Interconnection agreement execution status

Grid Connection Details

Field	Type	Description
`deliverability_status`	string	Full Capacity, Energy Only, Partial Capacity
`voltage_kv`	number	Interconnection voltage level (kV)
`station_transmission_line`	string	Interconnection point description
`study_area`	string	CAISO study area (typically null)

Developer Information

Field	Type	Description
`interconnecting_entity`	string	Always null - CAISO queue does not provide interconnecting entity information
`developer`	string	Developer name from Cleanview’s database (e.g., “NextEra Energy”, “Tesla”)

Data Updates: CAISO queue data is updated weekly. The API reflects the most recent queue data available from CAISO’s public reports.

Field Availability: Due to the nature of the CAISO interconnection queue, the interconnecting_entity field is always null. CAISO does not provide interconnecting entity information in their queue data. Use station_transmission_line for interconnection point details.

Missing Coordinates: CAISO data does not include latitude/longitude coordinates. For location analysis, use the county and state fields or the station_transmission_line for grid connection points.

Authorizations

x-api-key

string

header

required

API key authentication using x-api-key header

Query Parameters

limit

integer

default:50

Number of records to return

Required range: 50 <= x <= 5000

offset

integer

default:0

Number of records to skip

state

string

Filter by state code (CA, NV, AZ)

technology

string

Filter by technology type

min_capacity

number

Minimum capacity in MW

max_capacity

number

Maximum capacity in MW

Response

200

application/json

Successful response with CAISO interconnection queue data

The response is of type object.

ERCOT Interconnection Queue PJM Interconnection Queue

Overview

EIA Data

Interconnection Queues

Projects

Overview

Endpoint

Query Parameters

Technology Options

Status Options

Example Requests

Response Schema

Response Fields

Core Fields (Always Present)

Location & Timing

Technology & Fuel

Study Process (CAISO-Specific)

Grid Connection Details

Developer Information

Authorizations

Query Parameters

Response

Overview

EIA Data

Interconnection Queues

Projects

​Overview

​Endpoint

​Query Parameters

​Technology Options

​Status Options

​Example Requests

​Response Schema

​Response Fields

​Core Fields (Always Present)

​Location & Timing

​Technology & Fuel

​Study Process (CAISO-Specific)

​Grid Connection Details

​Developer Information

Authorizations

Query Parameters

Response

Overview

Endpoint

Query Parameters

Technology Options

Status Options

Example Requests

Response Schema

Response Fields

Core Fields (Always Present)

Location & Timing

Technology & Fuel

Study Process (CAISO-Specific)

Grid Connection Details

Developer Information