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8.3 MW Batteries (3 MW) + Solar Photovoltaic (5 MW) operating in Worcester, MA — ISO New England Inc.
8.3 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2019
Operating Since
Coordinates
42.6076, -72.0438
County
Worcester, MA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | REA Investments, LLC | REA Investments | — |
| Owner(s) | Happy Hollow Solar Holdings, LLC | Happy Hollow Solar Holdings LLC | — |
| Status | Operating | operating | — |
GEM identifies the owner as Happy Hollow Solar Holdings LLC
This entity is not yet in the GEM ownership database — chain unavailable.
Happy Hollow CSG Hybrid is a hybrid power plant located in Worcester County, Massachusetts. The facility, owned and operated by REA Investments, LLC, commenced operations in 2019. It has a total capacity of 8.3 MW, comprised of solar photovoltaic generation and battery energy storage. The plant utilizes two generators and is fueled primarily by MWH, indicating its reliance on stored energy. The battery energy storage system (BESS) has a capacity of 6.6 MWh and a duration of 2 hours, employing lithium-ion battery (LIB) chemistry. The solar array uses a fixed-tilt tracking system.
The plant operates within the ISO New England Inc. balancing authority and the NPCC NERC region. In its most recent year of operation, Happy Hollow CSG Hybrid generated 8,591 MWh, achieving a capacity factor of 11.8%. The plant is ranked 27th out of 126 power plants in Massachusetts and 871st nationally out of 1205 plants. Financial data for the plant is available from LBNL Solar.
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
404 MWh
Latest Month
8.6K MWh
Annual Generation
11.8%
Capacity Factor
Data from 2019–2024
$31.4/MWh
Energy Value
$3.0/MWh
Capacity Value
Point of Interconnection
Nearest Substation
North Baldwinville Substation · 69 kV
Substation Distance
3.589 km
Operator
Templeton Municipal Light and Water Plant
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.OTTER_RV69
Pricing Hub
.H.INTERNAL_HUB
Location Type
NETWORK NODE
Node Source
Curated node match
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ISO New England Inc. (ISNE)
Grid Voltage
13.2 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP