ISONE interconnection queue
64 interconnection requests are active in ISONE, totalling 13.9 GW, as of 15 August 2026. Of the 1,724 requests ever filed here, 361 were built and 1,299 were withdrawn — a build rate of 21.7% on decided applications.
Active requests
64
of 1,724 ever filed
Capacity queued
13.9 GW
requested, not committed
Built vs decided
21.7%
361 built, 1,299 withdrawn
Median wait so far
4.8 yr
for requests still active
Median time to build
2.5 yr
request to commercial operation
Source: the ISONE interconnection queue as published by the transmission provider, parsed and normalised by Watt Street. Data as of 15 August 2026. Wait times are medians over requests that carry a measured date.
What is queued in ISONE, by fuel
| Fuel | Projects | Capacity requested |
|---|---|---|
| Battery | 26 | 5.8 GW |
| Wind | 8 | 5.5 GW |
| Solar | 24 | 1.4 GW |
| Nuclear | 6 | 1.2 GW |
Where ISONE’s queue sits
| State | Applications | Capacity pending |
|---|---|---|
| Massachusetts | 601 | 9.8 GW |
| Rhode Island | 122 | 1.7 GW |
| Connecticut | 315 | 884 MW |
| Maine | 400 | 818 MW |
| New York | 13 | 470 MW |
| Vermont | 109 | 129 MW |
| New Hampshire | 136 | 125 MW |
| NB | 1 | 0 MW |
Largest active requests
| Project | Fuel | Capacity | County | State | Filed |
|---|---|---|---|---|---|
| SouthCoast Wind 1 | Wind | 1.2 GW | — | MA | 2021-04 |
| Somerset Wind Link - 1200 MW HVDC Line (Controllable) into Brayton Point | Nuclear | 1.2 GW | Bristol County | MA | 2019-02 |
| Bay State Wind 4 Offshore Wind | Wind | 1.2 GW | — | MA | 2019-12 |
| Park City Offshore Wind CNR | Wind | 838 MW | — | MA | 2021-01 |
| Park City Offshore Wind | Wind | 791 MW | — | MA | 2017-12 |
| Revolution Offshore Wind CNR only | Wind | 751 MW | — | RI | 2022-05 |
| Revoultion Offshore wind | Wind | 704 MW | — | RI | 2018-09 |
| Battery Storage | Battery | 508 MW | Middlesex County | MA | 2021-06 |
| Battery Storage | Battery | 500 MW | Barnstable County | MA | 2024-05 |
| Battery Storage | Battery | 500 MW | Middlesex County | MA | 2024-06 |
| Lite Brite Battery Storage | Battery | 300 MW | Suffolk County | MA | 2021-07 |
| Battery Storage | Battery | 300 MW | Norfolk County | MA | 2022-03 |
| Willard Storage (NYISO-C24-148) | Battery | 300 MW | Rensselaer County | NY | 2024-12 |
| Battery Storage | Battery | 290 MW | Berkshire County | MA | 2024-04 |
| Battery Storage | Battery | 250 MW | Hampden County | MA | 2023-03 |