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20 MW BESS operating in Franklin, NY — New York Independent System Operator
20 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Coordinates
44.8879, -74.1183
County
Franklin, NY
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | New York Power Authority | New York Power Authority | — |
| Owner(s) | New York Power Authority | New York Power Authority | — |
| Status | Operating | — | — |
Willis Battery Storage is a 20 MW battery energy storage system located in Franklin County, New York. The plant began operating in 2023 and is owned and operated by the New York Power Authority. It is connected to the New York Independent System Operator (NYISO) balancing authority and is within the Northeast Power Coordinating Council (NPCC) NERC region.
The facility consists of a single generator utilizing battery technology. The battery energy storage system (BESS) has a storage capacity of 20 MWh, providing a duration of 1 hour. The battery chemistry is lithium-ion (LIB). Willis Battery Storage ranks as the 13th largest of 65 battery storage plants in New York state, and 692nd nationally out of 1205 such plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
NYISO
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
New York Independent System Operator (NYIS)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility
−112 MWh
Net Charging
-1.2K MWh
Annual Net Energy
-0.7%
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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $27.2M
Point of Interconnection
Nearest Substation
JERICHO_RISE_WT_PWR
Substation Distance
< 10 km
Coord Source
NYISO direct
Market Position
ISO/RTO Market
NYISO
LMP Node
—
Pricing Hub
NYISO Zone D
Node Source
Shared substation inference
Substation identified. Node ID not yet resolved against ISO roster.
Last updated 2026-03-14
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