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Interregional Renewable Energy Zones

Published by Strategic Energy Analysis Center | Department of Energy | Metadata Last Checked: January 27, 2026 | Last Modified: 2024-12-18T17:36:27Z
Interregional Renewable Energy Zones (IREZs) are a component of the National Transmission Planning Study (NTPS), which analyzes strategies for building out transmission infrastructure to support decarbonizing the electricity sector by 2035. In particular, IREZs envision long-distance transmission corridors for moving large amounts of low-cost renewable energy. An IREZ is a transmission collection point that is easily accessible to a very high volume of low-cost developable wind and solar energy potential. This dataset includes 155 IREZs identified across the continental United States where each IREZ is characterized by its primary and secondary resource.

Resources

13 resources available

  • The table shows the supply curve of each IREZ within the region of CAISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of ERCOT. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of FRCC. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of ISONE. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of MISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of NYISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • This map shows the spatial distribution of wind and solar IREZs overlaid with the transmission plan region and the states boundary. IREZs within a region are in alphabetical order representing the order of total capacity of the primary and secondary resource. A letter within a region corresponds to the tab name of a region’s supply curve table.

    APPLICATION/OCTET-STREAM
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  • This file summarizes 155 IREZs by Hub_Id, Region (transmission plan region), Primary (primary resource type), PV_GW (PV total capacity, GW), Wd_GW (wind total capacity, GW), PV_LCOE_10 (the 10th percentile of LCOE of PV, $/MWh), PV_LOCE_50(the 50th percentile of LCOE of PV, $/MWh), PV_LCOE_avg (the average LCOE of PV, $/MWh), Wd_LCOE_10 (the 10th percentile of LCOE of wind, $/MWh), Wd_LOCE_50(the 50th percentile of LCOE of Wd, $/MWh), Wd_LCOE_avg (the average LCOE of wind, $/MWh), lon (longitude) and lat (latitude).

    APPLICATION/OCTET-STREAM
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  • The table shows the supply curve of each IREZ within the region of NorthernGrid. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of PJM. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of SERTP. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of SPP. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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  • The table shows the supply curve of each IREZ within the region of WestConnect. Each tab presents an IREZ where the tabs are ranked by the total capacity.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
                                            [
  "019:20"
]
contactPoint 
                                            {
  "fn": "David J. Hurlbut",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:David.Hurlbut@nrel.gov"
}
dataQuality 
                                            true
description Interregional Renewable Energy Zones (IREZs) are a component of the National Transmission Planning Study (NTPS), which analyzes strategies for building out transmission infrastructure to support decarbonizing the electricity sector by 2035. In particular, IREZs envision long-distance transmission corridors for moving large amounts of low-cost renewable energy. An IREZ is a transmission collection point that is easily accessible to a very high volume of low-cost developable wind and solar energy potential. This dataset includes 155 IREZs identified across the continental United States where each IREZ is characterized by its primary and secondary resource.
distribution 
                                            [
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of CAISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/CAISO_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of CAISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
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  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of ERCOT. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/ERCOT_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of ERCOT. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
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  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of FRCC. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/FRCC_Supply_Curve.xlsx",
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    "description": "The table shows the supply curve of each IREZ within the region of FRCC. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
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  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of ISONE. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/ISONE_Supply_Curve.xlsx",
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    "description": "The table shows the supply curve of each IREZ within the region of ISONE. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
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  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of MISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
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    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of MISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
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    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of NYISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/NYISO_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of NYISO. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  },
  {
    "@type": "dcat:Distribution",
    "title": "This map shows the spatial distribution of wind and solar IREZs overlaid with the transmission plan region and the states boundary. IREZs within a region are in alphabetical order representing the order of total capacity of the primary and secondary resource. A letter within a region corresponds to the tab name of a region’s supply curve table.",
    "accessURL": "https://data.nrel.gov/system/files/194/National%20IREZs%20Map.jpg",
    "mediaType": "application/octet-stream",
    "description": "This map shows the spatial distribution of wind and solar IREZs overlaid with the transmission plan region and the states boundary. IREZs within a region are in alphabetical order representing the order of total capacity of the primary and secondary resource. A letter within a region corresponds to the tab name of a region’s supply curve table."
  },
  {
    "@type": "dcat:Distribution",
    "title": "This file summarizes 155 IREZs by Hub_Id, Region (transmission plan region), Primary (primary resource type), PV_GW (PV total capacity, GW), Wd_GW (wind total capacity, GW), PV_LCOE_10 (the 10th percentile of LCOE of PV, $/MWh), PV_LOCE_50(the 50th percentile of LCOE of PV, $/MWh), PV_LCOE_avg (the average LCOE of PV, $/MWh), Wd_LCOE_10 (the 10th percentile of LCOE of wind, $/MWh), Wd_LOCE_50(the 50th percentile of LCOE of Wd, $/MWh), Wd_LCOE_avg (the average LCOE of wind, $/MWh), lon (longitude) and lat (latitude).",
    "accessURL": "https://data.nrel.gov/system/files/194/National%20IREZs.csv",
    "mediaType": "application/octet-stream",
    "description": "This file summarizes 155 IREZs by Hub_Id, Region (transmission plan region), Primary (primary resource type), PV_GW (PV total capacity, GW), Wd_GW (wind total capacity, GW), PV_LCOE_10 (the 10th percentile of LCOE of PV, $/MWh), PV_LOCE_50(the 50th percentile of LCOE of PV, $/MWh), PV_LCOE_avg (the average LCOE of PV, $/MWh), Wd_LCOE_10 (the 10th percentile of LCOE of wind, $/MWh), Wd_LOCE_50(the 50th percentile of LCOE of Wd, $/MWh), Wd_LCOE_avg (the average LCOE of wind, $/MWh), lon (longitude) and lat (latitude)."
  },
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of NorthernGrid. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/NorthernGrid_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of NorthernGrid. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  },
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of PJM. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/PJM_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of PJM. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  },
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of SERTP. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/SERTP_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of SERTP. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  },
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of SPP. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/SPP_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of SPP. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  },
  {
    "@type": "dcat:Distribution",
    "title": "The table shows the supply curve of each IREZ within the region of WestConnect. Each tab presents an IREZ where the tabs are ranked by the total capacity.  ",
    "format": "  ",
    "accessURL": "https://data.nrel.gov/system/files/194/WestConnect_Supply_Curve.xlsx",
    "mediaType": "application/octet-stream",
    "description": "The table shows the supply curve of each IREZ within the region of WestConnect. Each tab presents an IREZ where the tabs are ranked by the total capacity.  "
  }
]
identifier https://data.openei.org/submissions/8246
issued 2022-09-02T16:50:38Z
keyword 
                                            [
  "Renewable Energy Zones",
  "Transmission"
]
landingPage https://data.nrel.gov/submissions/194
license https://creativecommons.org/licenses/by/4.0/
modified 2024-12-18T17:36:27Z
programCode 
                                            [
  "019:000"
]
projectNumber DE-AC36-08GO28308
projectTitle National Transmission Planning Study
publisher 
                                            {
  "name": "Strategic Energy Analysis Center",
  "@type": "org:Organization"
}
title Interregional Renewable Energy Zones

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