- Abington3 business days
- Acton9 business days
- Agawam Town7 business days
- Amesbury Town0.5 business days
- Amherst5 business days
- Andover4 business days
- Arlington12 business days
- Ashland6.5 business days
- Athol5 business days
- Attleboro2 business days
- Auburn7 business days
- Avon4 business days
- Ayer15 business days
- Barnstable Town10 business days
- Belchertown4 business days
- Bellingham3 business days
- Beverly7 business days
- Billerica3.5 business days
- Blackstone5 business days
- Boston12 business days
- Bourne5 business days
- Bridgewatersame day
- Brockton6 business days
- Burlington1 business day
- Canton10.5 business days
- Chelmsford2 business days
- Chelsea15.5 business days
- Clinton6 business days
- Dalton3 business days
- Dartmouth1.5 business days
- Dedham5 business days
- Dennis16.5 business days
- Dracut5 business days
- Dudley5 business days
- Haverhill4 business days
- Lawrencesame day
- Ludlow15 business days
- Lynn7 business days
- Methuen Town4 business days
- Northampton3 business days
- Pittsfield1 business day
- Quincy2 business days
- Randolph2 business days
- Springfield30 business days
- Worcester4.5 business days
Massachusetts utility interconnection
| Utility | Approval before install | Apply via | Fee | Utility response | System size cap | Capacity map |
|---|---|---|---|---|---|---|
| Fitchburg Gas & Elec Light Co (FG&E / Unitil) | Required | Portal | No online payment | 10 days (required by rule) | No size cap on record | Hosting capacity map |
| Massachusetts Electric Co (National Grid) | Required | Portal | Online payment | 3 days (voluntary) | No size cap on record | Yes |
| NSTAR Electric Company (Boston Edision) | Required | Portal | No fee | 3 days (voluntary) | No size cap on record | Yes |
| Western Massachusetts Electric Company (WMECO / Eversource) | Required | No fee | 10 days (required by rule) | No size cap on record | Yes |
Source: SolarTRACE, National Renewable Energy Laboratory (NREL), 2025-09-09 release. Times are medians for residential solar in the year shown. Requirements change — confirm current rules, fees and forms with the jurisdiction before you submit.