Mammoth North Solar — Plant Summary
- EIA Plant ID
- 65957
- Capacity
- 400 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Starke, IN
- Operating Since
- 2024
- Generators
- 1
- Operator
- Mammoth North, LLC
- Parent Company
- —
- Annual Generation
- 748,323 MWh
- Capacity Factor
- 21.3%
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
Mammoth North Solar
OperatingSolar
Ranked #2 of 140 Solar plants in IN#70 of 7447 nationally
400 MW Solar operating in Starke, IN — PJM Interconnection, LLC
EIAGEM
400 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2024
Operating Since
Location
Coordinates
41.1993, -86.6338
County
Starke, IN
Nearby Plants
- Mammoth South Solar ProjectSolar300 MW · 12.5 km
- Mammoth Central II Solar FacilitySolar300 MW · 13.2 km
- IMPA Winamac Solar ParkSolar3.3 MW · 16.7 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Mammoth North, LLC | Doral Renewables LLC [100%] | — |
| Owner(s) | Mammoth North, LLC | Doral Renewables LLC [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Doral Renewables LLC [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Mammoth North Solar is a 400 MW solar photovoltaic power plant located in Starke County, Indiana. The plant, owned and operated by Mammoth North, LLC, commenced operations in 2024. It utilizes single-axis tracking technology to maximize solar energy capture. As of its first year of operation, it ranks as the largest solar plant in Indiana (1 of 35) and 43rd nationally (out of 639).
The plant's latest annual generation was 748,323 MWh, achieving a capacity factor of 21.3%. Mammoth North Solar operates within the PJM Interconnection, LLC balancing authority and the RFC NERC region. Financial data is available for the plant from LBNL, though specific figures are not provided.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
345 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Interconnection Queue1 projectBeta
Mammoth North Solar Project
OperationalSolar300 MWPJM
Generation
26.1K MWh
Latest Month
748.3K MWh
Annual Generation
21.3%
Capacity Factor
Financial DataBeta
Source: LBNL Utility-Scale SolarHIGH
$39.9/MWh
LCOE (Levelized Cost)
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Bass Lake Sub · 69 kV
Substation Distance
< 10 km
Operator
NIPSCO
Coord Source
OSM spatial
Market Position
ISO/RTO Market
PJM
LMP Node
ORAORA
Pricing Hub
N ILLINOIS HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
Deals·project finance
Doral to build NIS 1.5b solar project in Texas
The Cold Creek project will have an output of 553 megawatts and storage capacity of 340 megawatt-hours. Doral Group Renewable Energy...
Doral (developer)Texas (other)
Globes - Israel Business News·5 months ago
Industry·corporate
TSF story: Mammoth Solar pushes back against opposition with ‘agrivoltaics’
This story was originally published by TheStatehouseFile.com by Olivia O'Neal TheStatehouseFile.com June 26, 2025 Opposition against solar...
Mammoth Solar (other)
the indiana citizen·9 months ago
General
Major Indiana Solar Project Advances to Next Phase
Project manager Bechtel said construction of the 1.3-GW Mammoth Solar facility in Indiana is moving forward, with the company on May 16...
POWER Magazine·10 months ago
Industry·corporate
A 'Mammoth' Agrivoltaic Project Crosses the Political Divide in Indiana
Solar industry advocates are facing new hurdles at every level of government, from local town halls to the White House.
TriplePundit·11 months ago
Last updated 2026-03-26
View all 10 articles