Firefly Solar PA — Plant Summary
- EIA Plant ID
- 67984
- Capacity
- 401.6 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Planned
- Location
- Lawrence, PA
- Operating Since
- —
- Generators
- 1
- Operator
- Vesper Energy Development LLC
- Parent Company
- —
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
Firefly Solar PA
PlannedSolarGEM: pre-construction
Ranked #1 of 87 Solar plants in PA#65 of 7447 nationally
401.6 MW Solar planned in Lawrence, PA — PJM Interconnection, LLC
EIAGEM
401.6 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
Planned: —
Planned Operation
Location
Coordinates
40.9303, -80.4324
County
Lawrence, PA
Nearby Plants
- New Castle PlantNatural Gas354.4 MW · 5.5 km
- Hickory Run Energy StationNatural Gas1033.7 MW · 7.1 km
- MahoningLandfill Gas4 MW · 12.3 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Vesper Energy Development LLC | — | — |
| Owner(s) | Vesper Energy Development LLC | — | — |
| Status | Planned | pre-construction | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Firefly Solar PA is a 401.6 MW solar photovoltaic power plant located in Lawrence County, Pennsylvania. It is the largest solar plant in the state, ranking first among eleven solar facilities, and 37th nationally out of 639. The plant has a single generator and utilizes fixed-tilt solar tracking technology.
The plant is operated by Vesper Energy Development LLC and falls within the PJM Interconnection, LLC balancing authority and the RFC NERC region. Its primary fuel source is solar energy (SUN).
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
No generation data available for this plant.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
PJM
LMP Node
Hoytdale-McClelland 345kV
Pricing Hub
WESTERN HUB
Node Source
EIA-860 direct report
News & Articles (6)Beta
Industry·corporate
Environment & Energy Educational Opportunities For Students & Adults
Opportunities to learn more about environmental and energy issues affecting Pennsylvania for students and adults--. Awards/Recognition.
PA Environment Digest Blog·6 days ago
Industry·corporate
Vesper’s Firefly Solar Project Being Developed in Pennsylvania
The Firefly Solar Project is a planned utility-scale solar facility in Lawrence County, Pennsylvania, developed by Vesper Energy.
Vesper Energy (developer)Firefly Solar Project (operator)
constructionreviewonline.com·5 months ago
Industry·corporate
DCNR Unveils Solar Energy Facility At Gifford Pinchot State Park In York County Cutting Costs, Climate-Changing Emissions On Public Land; Celebrating 30 Years Of Stewardship
On April 23, the Department of Conservation and Natural Resources marked a major sustainability milestone – celebrating 30 years of...
Department of Conservation and Natural Resources (other)
PA Environment Digest Blog·11 months ago
Industry·corporate
Hornet Solar Project, US
Hornet Solar Project in Texas, the US, is the flagship energy project of utility-scale renewable energy project developer Vesper Energy.
Hornet Solar Project (operator)Vesper Energy (developer)
NS Energy·11 months ago
Last updated 2026-03-14
View all 6 articles