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4 MW Batteries (2 MW) + Solar Photovoltaic (2 MW) operating in Barnstable, MA — ISO New England Inc.
4 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2023
Operating Since
Coordinates
41.7178, -70.4799
County
Barnstable, MA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | LSE Ophiuchus LLC | — | — |
| Owner(s) | LSE Ophiuchus LLC | — | — |
| Status | Operating | operating | — |
The Sandwich power plant, located in Barnstable County, Massachusetts, is a hybrid solar and battery energy storage system (BESS) facility. Operated by LSE Ophiuchus LLC, the plant has a total capacity of 4 MW and commenced operations in 2023. It consists of two generators utilizing both solar photovoltaic and battery technologies, with the primary fuel listed as MWH. The BESS component has a storage capacity of 4.6 MWh and a duration of 2.3 hours, employing lithium-ion battery (LIB) chemistry. The solar array uses a fixed-tilt tracking system.
In its latest year of operation, the Sandwich plant generated 4,559 MWh of electricity, achieving a capacity factor of 13.0%. The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. Sandwich ranks as the 84th largest power plant in Massachusetts out of 126, and 1031st nationally out of 1205.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
227 MWh
Net Discharge
4.6K MWh
Annual Net Energy
13.0%
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.
Data from 2024
$33.0/MWh
Energy Value
$4.6/MWh
Capacity Value
Point of Interconnection
Nearest Substation
Sandwich Substation · 115 kV
Substation Distance
1.132 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.SANDWICH24.0
Pricing Hub
.H.INTERNAL_HUB
Location Type
NETWORK NODE
Node Source
Curated node match
Last updated 2026-03-26
View all articlesISO New England Inc. (ISNE)
Grid Voltage
23.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP