Massachusetts has 518 solar farms in the EIA Form 860 database, with a combined installed capacity of 1,408 MW. Of those, 0 plants are utility-scale (50 MW or larger). The largest single facility is SJA Solar LLC-Solterra Monastery CSG in Spencer, Worcester County — a 15 MW plant operated by SJA Solar, LLC.
Use the interactive Massachusetts solar farms map below to explore every plant, color-coded by technology type and sized by capacity. Click any solar farm for its name, operator, capacity (MW), technology, and location — or view the full US solar farms interactive map to compare Massachusetts to every other state.
Type
Capacity
Massachusetts Solar Farms by the Numbers
- 518 total solar farms in Massachusetts (EIA Form 860 (US Energy Information Administration), latest reporting period)
- 1,408 MW total installed solar capacity
- 225 MW co-located battery storage capacity
- 0 utility-scale plants (50 MW or larger)
- 458 small / community-scale plants (under 5 MW)
Massachusetts Solar Farms by Technology Type
- 428 Solar Photovoltaic (PV) — standard panel installations, the dominant technology nationwide
- 90 Solar PV with Battery Storage — newer hybrid plants that pair panels with on-site batteries to store excess generation
The 15 Largest Solar Farms in Massachusetts
The largest solar farm in Massachusetts by installed capacity is SJA Solar LLC-Solterra Monastery CSG at 15 MW. The 15 largest Massachusetts solar farms from the latest EIA filing:
| # | Solar Farm | Operator | Capacity | Location |
|---|---|---|---|---|
| 1 | SJA Solar LLC-Solterra Monastery CSG | SJA Solar, LLC | 15 MW | Spencer, Worcester |
| 2 | Barrett PV | MN8 Energy LLC | 12 MW | Oxford, Worcester |
| 3 | Worcester Landfill | City of Worcester DPW | 6 MW | Worcester, Worcester |
| 4 | Dartmouth | Mass Solar, LLC | 6 MW | Dartmouth, Bristol |
| 5 | East Acres Solar NG, LLC | NuGen Capital Management | 6 MW | Pittsfield, Berkshire |
| 6 | Syncarpha Puddon I Hybrid CSG | Syncarpha Puddon I, LLC | 5 MW + 4 MW battery | Northbridge, Worcester |
| 7 | West Street Solar 1 LLC | AES Distributed Energy | 5 MW | Gardner, Worcester |
| 8 | Syncarpha Puddon II Hybrid CSG | Syncarpha Puddon II, LLC | 5 MW + 4 MW battery | Northbridge, Worcester |
| 9 | Happy Hollow CSG Hybrid | REA Investments, LLC | 5 MW + 3 MW battery | Winchendon, Worcester |
| 10 | ENGIE 2019 ProjectCo-MA1, LLC | ENGIE 2019 ProjectCo MA-1, LLC | 5 MW | Agawam, Hampden |
| 11 | 160 Tihonet Rd Hybrid(CSG) | 160TIH WHAM8 Solar, LLC | 5 MW + 3 MW battery | Wareham, Plymouth |
| 12 | Tanglewood Circle Solar 1 LLC | Tanglewood Circle Solar 1 LLC | 5 MW | Becket, Berkshire |
| 13 | Syncarpha Millbury Hybrid (CSG) | Syncarpha Millbury, LLC | 5 MW + 4 MW battery | Millbury, Worcester |
| 14 | 77 Farm to Market Rd Hybrid(CSG) | 77F2M WHAM8 Solar, LLC | 5 MW + 2 MW battery | Wareham, Plymouth |
| 15 | ASD Wallum MA Solar LLC(CSG) | ASD Wallum MA Solar LLC | 5 MW + 4 MW battery | Douglas, Worcester |
Top Solar Operators in Massachusetts
Five operators account for the largest share of solar generation in Massachusetts:
- AES Distributed Energy — 36 plants, 111 MW total
- Altus Power America Management, LLC — 27 plants, 63 MW total
- Citizens Enterprises Corporation — 19 plants, 46 MW total
- NSTAR Electric Company — 17 plants, 45 MW total
- MN8 Energy LLC — 13 plants, 40 MW total
Solar Permitting and Regulation in Massachusetts
Utility-scale solar in Massachusetts is overseen by the Massachusetts Department of Public Utilities. Wholesale market participation and interconnection are regulated by the Federal Energy Regulatory Commission (FERC) and the relevant ISO/RTO. All generators above 1 MW must report capacity, fuel type, and location to the EIA via Form 860 — the dataset used in this map.
Frequently Asked Questions
How many solar farms are in Massachusetts?
Massachusetts has 518 solar farms in the latest EIA Form 860 filing — a combined 1,408 MW of installed capacity. Of those, 0 are utility-scale (50 MW or larger).
What is the largest solar farm in Massachusetts?
The largest solar farm in Massachusetts is SJA Solar LLC-Solterra Monastery CSG, located in Spencer (Worcester County), with 15 MW of installed capacity. It is operated by SJA Solar, LLC.
How much solar capacity does Massachusetts have?
Massachusetts has 1,408 MW of installed solar capacity across 518 plants reporting to the EIA. This counts only the solar portion (Solar_MW field) — co-located batteries and other generation are reported separately.
Who regulates solar farms in Massachusetts?
Solar farms in Massachusetts are regulated by the Massachusetts Department of Public Utilities at the state level, with federal oversight from FERC. The EIA collects annual data on every utility-scale solar plant via Form 860.
View all 6,406 US solar farms on the national interactive map
