401 South

401 South St, Dalton, MA 1226

Plant Summary Information

401 South is ranked #522 out of 541 solar farms in Massachusetts in terms of total annual net electricity generation.

401 South generated 169.0 MWh during the 3-month period between September 2025 to December 2025.

Plant Name	401 South
Utility Name	Madison Energy Investments LLC
Location	Berkshire County, MA
Initial Operation Date	December 2023
Last Update	Dec 2025
Annual Generation	945.0 MWh
Annual Consumption	3.3 k MMBtu
Ranked #12,020 out of 13,081 Power Plants Nationwide
Ranked #6,724 out of 7,015 Solar Power Plants Nationwide
Ranked #622 out of 648 Massachusetts Power Plants
Ranked #522 out of 541 Massachusetts Solar Power Plants
Fuel Types	Solar

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Summary Information
Plant Name	401 South (67241)
Plant Address	401 South St, Dalton, MA 1226
Utility	Madison Energy Investments LLC (65043)
Latitude, Longitude	42.464, -73.184
Generation Dates on File	Mar 2024 to Dec 2025
Initial Operation Date	December 2023
Annual Generation	945.0 MWh
Fuel Types	Solar

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	Yes
FERC Small Power Producer Docket Number	24-203-000
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Non-Regulated
NERC Region	NPCC
Balancing Authority	Southern Company Services, Inc. - Trans (SOCO)
NAICS Code	Utilities (22)
Sector	IPP Non-CHP (2)
Water Source
Ash Impoundment
Transmission / Distribution Owner	NSTAR Electric Company (54913) MA
Grid Voltage	12.50 kV
Energy Storage	Yes

* Data obtained from the 2025 EIA 860 Report

Uprate/Derate Completed	No
Status	Operating
First Operation Date	December 2023
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Electricity used for energy storage
Time From Cold Shutdown To Full Load	10M

Energy Storage Details
Nameplate Energy Capacity MWH	2
Maximum Charge Rate	0.5 MW
Maximum Discharge Rate	0.5 MW
Storage Technology	LIB
Nameplate Reactive Power Rating	1
Storage Enclosure Type	CS
Excess Wind And Solar Generation	P
Ac Coupled	Yes
Direct Support Of Another Unit	Yes
Direct Support Plant Id	67241
Direct Support Gen Id	4SPV1
Support T D Asset	No

Solar Details
Fixed Tilt	Yes
Azimuth Angle	171
Tilt Angle	5
DC Net Capacity	1.4 MW
Crystalline Silicon	Yes
Net Metering Agreement	No
Virtual Net Metering Agreement	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Solar.

Rank	Plant Name	Plant Location	Annual Generation
#6714	Progress Manis I	Laurinburg, NC	974.0 MWh
#6715	AC Criminal Courts Complex SPE2, LLC	Mays Landing, NJ	972.0 MWh
#6716	Lineage MS	Richland, MS	971.0 MWh
#6717	Kotzebue Hybrid	Kotzebue, AK	20.3 GWh
#6718	Brookside	North Smithfield, RI	969.0 MWh
#6719	WW-DC Solar 1, LLC	Washington, DC	962.0 MWh
#6720	MSC-Chisago02 LLC	Taylors Falls, MN	954.0 MWh
#6721	NEDC Solar Site	Whitinsville, MA	953.0 MWh
#6722	SunE Rochester	Rancho Cucamonga, CA	946.0 MWh
#6723	Hopewell Valley High School Hybrid	Pennington, NJ	946.0 MWh
#6725	Shelby Solar Energy Generation Facility	Shelby, NC	938.0 MWh
#6726	Rariton OMP	Raritan, NJ	932.0 MWh
#6727	Caldwell Wastewater Treatment Plant Hybr	West Caldwell, NJ	932.0 MWh
#6728	Morgantown Solar Park	Morgantown, PA	930.0 MWh
#6729	Broadway 3 - UC Merced 1	Merced, CA	929.0 MWh
#6730	USS Greenhouse Solar LLC CSG	Pine Island, MN	927.0 MWh
#6731	Novel Swenson Solar LLC CSG	North Branch, MN	922.0 MWh
#6732	McKee City Solar Phase 2	Egg Harbor Township, NJ	922.0 MWh
#6733	Western Branch High School	Chesapeake, VA	921.0 MWh
#6734	3100 Valleyview Drive	Columbus, OH	916.0 MWh

Below are closest 20 power plants surrounding 401 South.

Plant Name	Plant Location	Annual Generation	Distance
Berkshire Wind Power Project	Lanesboro, MA	31.9 GWh	9.7 mi
Downing Parkway Solar	Pittsfield, MA	3.2 GWh	0.7 mi
East Acres Solar NG, LLC	Pittsfield, MA	4.8 GWh	3.4 mi
Harbor Road Solar 1	Cheshire, MA	2.7 GWh	9.1 mi
Hinsdale Solar PV	Hinsdale, MA	2.8 GWh	4.1 mi
Jiminy Peak Wind QF	Hancock, MA	2.0 MWh	7.8 mi
Nexamp Peak CSG	Hancock, MA	2.1 GWh	8.6 mi
Oak Leaf Solar XVI Community Solar	Pittsfield, MA	10.0 MWh	6.3 mi
Oak Leaf Solar XVII Community Solar	Pittsfield, MA	47.0 MWh	6.3 mi
Partridge Solar	Lanesborough, MA	8.1 GWh	2.4 mi
Peru (MA)	Peru, MA	5.2 GWh	6.6 mi
Pittsfield 44 - M&W PV	Pittsfield, MA	1.5 GWh	2.3 mi
Pittsfield Generating LP	Pittsfield, MA	136.2 GWh	1.8 mi
Saddleback Solar	Lanesborough, MA	3.5 GWh	5.5 mi
Savoy Solar PV	Savoy, MA	2.9 GWh	9.5 mi
Silver Lake Solar Photovoltaic Facility	Pittsfield, MA	2.4 GWh	3 mi
Skyline Solar	Lanesborough, MA	8.2 GWh	3.5 mi
Syncarpha Hancock I CSG	Hancock, MA	2.7 GWh	8 mi
Syncarpha Hancock II CSG	Hancock, MA	2.8 GWh	8.7 mi
Syncarpha Hancock III CSG	Pittsfield, MA	1.4 GWh	8 mi