4.9 MW BESS operating in Somerset, ME — ISO New England Inc.
4.9 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2019
Operating Since
Coordinates
42.0317, -72.5046
County
Somerset, ME
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Agilitas Energy, Inc. | — | — |
| Owner(s) | Madison ESS, LLC | — | — |
| Status | Operating | — | — |
Madison ESS is a 4.9 MW battery energy storage system located in Somerset County, Maine. The plant began operating in 2019 and is owned and operated by Agilitas Energy, Inc. The facility utilizes lithium-ion batteries (LIB) to store 10 MWh of energy, providing a duration of approximately 2.04 hours at full capacity. The plant's primary fuel is listed as "MWH," indicating that it draws power from the grid for storage.
Madison ESS operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. As of the latest rankings, it is the 4th largest of 6 battery storage facilities in Maine and ranks 996th out of 1205 nationally. The plant consists of a single generator and uses batteries as its sole technology.
Generated from EIA, GEM, and public data sources
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
34.5 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
0 MWh
Net Discharge
-65 MWh
Annual Net Energy
-0.2%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
No financial data available for this plant.
Point of Interconnection
Nearest Substation
Madison Substation · 115 kV
Substation Distance
< 10 km
Operator
Madison Electric Works
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
31750
Pricing Hub
.Z.MAINE
Node Source
EIA-860 direct report