Interconnection queue › Massachusetts › Storage

Storage Projects in the Massachusetts Interconnection Queue

Snapshot of 2026-09-07 · 163 projects

163 storage projects are in the interconnection queue with a Massachusetts location, totaling 23,745 MW across the 163 that publish a capacity.

Grouped from the ISOs' own fuel codes (see the mapping). Codes we could not match to a published definition are left unclassified rather than assigned here.

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By ISO

ISO	Projects	Capacity
ISO-NE	163	23,745 MW

By status, as published

Status	Projects
(not published)	163

Top counties

County	Projects	Capacity
Worcester	36	3,680 MW
Bristol	26	4,436 MW
Hampden	22	3,161 MW
Middlesex	17	2,925 MW
Norfolk	14	2,276 MW
Franklin	10	913 MW
Plymouth	9	990 MW
Berkshire	8	1,165 MW
Essex	7	1,141 MW
Hampshire	5	388 MW
Suffolk	4	1,526 MW
Barnstable	4	993 MW
Wocester	1	153 MW

Largest projects with published capacity

The 12 highest-capacity rows in this page's exact scope, ordered by the capacity the ISO published. Projects without a published capacity are not ranked here and remain included in the totals above.

Project	ISO	County	MW	Status	Queue date	Proposed operation
Battery Storage ID 1037	ISO-NE	Suffolk	700	not published	8/4/2020	6/1/2024
Battery Storage ID 1426	ISO-NE	Bristol	529	not published	7/14/2023	3/31/2028
Battery Storage ID 1143	ISO-NE	Middlesex	508	not published	6/15/2021	5/31/2028
Battery Storage ID 1057	ISO-NE	Middlesex	500	not published	8/28/2020	6/1/2025
Battery Storage ID 1543	ISO-NE	Barnstable	500	not published	5/28/2024	12/1/2028
Battery Storage ID 1567	ISO-NE	Middlesex	500	not published	6/11/2024	4/27/2028
Battery Storage ID 1514	ISO-NE	Worcester	408	not published	4/8/2024	8/30/2028
Battery Storage ID 1517	ISO-NE	Franklin	366	not published	4/9/2024	8/30/2028
Battery Storage ID 1460	ISO-NE	Bristol	350	not published	10/12/2023	9/30/2027
Battery Storage ID 1252	ISO-NE	Essex	310	not published	4/21/2022	8/1/2032
Battery Storage Increase (QP1238) ID 1362	ISO-NE	Norfolk	301	not published	2/24/2023	11/12/2027
Battery Storage ID 1363	ISO-NE	Hampden	301	not published	3/1/2023	11/20/2026

Where each number came from

ISO	We last read	Source last changed	Source
ISO-NE	2026-09-07	2026-09-07 (changed this snapshot)	source file

This week's changes · How this is collected

Compiled from each ISO's own published interconnection queue report. Queue position is not a permit, a contract, or a guarantee that a project will be built; most projects in every queue are eventually withdrawn. Figures are reproduced as published, are provided for informational purposes only, and carry no warranty of accuracy or completeness. Always verify against the ISO's own report before relying on any figure.