Stephentown Spindle — Plant Summary
- EIA Plant ID
- 57710
- Capacity
- 20 MW
- Primary Fuel
- Battery Storage
- Technology
- Flywheels
- Status
- Operating
- Location
- Rensselaer, NY
- Operating Since
- 2011
- Generators
- 1
- Operator
- Convergent Energy and Power LP
- Parent Company
- —
- Annual Generation
- -3,550 MWh
- Capacity Factor
- -2.0%
- Balancing Authority
- New York Independent System Operator
- ISO/RTO
- NYISO
- NERC Region
- NPCC
Stephentown Spindle
OperatingBESS
Ranked #13 of 54 BESS plants in NY#479 of 837 nationally
20 MW BESS operating in Rensselaer, NY — New York Independent System Operator
EIAWD
20 MW
Nameplate Capacity
1
Generators
unit
Flywheels
Technology
2011
Operating Since
Location
Coordinates
42.5563, -73.3771
County
Rensselaer, NY
Nearby Plants
- Jiminy Peak Wind QFWind1.5 MW · 7.0 km
- Nexamp Peak CSGSolar2 MW · 7.6 km
- Berkshire Wind Power ProjectWind19.6 MW · 9.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Convergent Energy and Power LP | — | — |
| Owner(s) | Stephentown Spindle, LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Stephentown Spindle is a 20 MW flywheel energy storage facility located in Rensselaer County, New York. The plant, which began operating in 2011, is owned and operated by Convergent Energy and Power LP. It is the 11th largest energy storage plant in New York state out of 65, and ranks 696th nationally out of 1205 similar facilities. The plant has one generator.
The facility's primary fuel source is listed as MWH (megawatt-hours), indicating it stores and discharges electricity rather than consuming a traditional fuel. The Stephentown Spindle operates within the New York Independent System Operator (NYISO) balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
New York Independent System Operator
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
−308 MWh
Net Charging
-3.5K MWh
Annual Net Energy
-2.0%
Capacity Factor
Jan 2022 – Dec 2024
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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
MEDIUM confidencePoint of Interconnection
Nearest Substation
BEACON___LESR
Substation Distance
< 10 km
Coord Source
NYISO direct
Market Position
ISO/RTO Market
NYISO
LMP Node
BEACON__LESR
Pricing Hub
NYISO Zone F
Node Source
Shared substation inference
News & Articles (2)Beta
Deals·m and a
Convergent buys up 40MW of flywheels in New York and Pennsylvania
Convergent Energy + Power, a US-Canadian project developer which has attracted investment from the venture capital arm of Statoil, has acquired 40MW of...
Convergent Energy + Power (buyer)Statoil (other)
Energy-Storage.News·7 years ago
Industry·corporate
Beacon Power bankrupt; had U.S. backing like Solyndra
Beacon Power Corp filed for bankruptcy on Sunday, just a year after the energy storage company received a $43 million loan guarantee from a...
Beacon Power Corp (operator)
Reuters·14 years ago
Last updated 2026-03-14
View all articles