RE Tranquillity

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Power plant · Solar

Key facts

Power plant · Solar Operating

Capacity: Capacity: sourceEIA-860M · 30 Oct 2026Open licenseMW

Commissioned: 2016
Net generation, 2025: 484,790 MWh
Grid: 230 kV to Pacific Gas & Electric Co (CISO)
Location: Fresno County, California
Operated by: Southern Power Co

Output

Net generation MWh by year, 2016 to 2025

Operations detail

Details

Who’s behind it

Owner: RE Tranquillity LLC, SP Tranquillity Solar Storage, LLC

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Technology: Solar source: “Solar Photovoltaic”
Age: 10 years since 2016

All 6 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory

Attributes
Attribute	Value
Gem	Unit ids G100000805498 Location id L100000804770 Eia plant ids 59939
Grid	Nerc region WECC Report year 2025 Grid voltage kv 230 Transmission owner Pacific Gas & Electric Co Balancing authority code CISO Balancing authority name California Independent System Operator
Fuel burned (MMBtu), 2025	1,689,189
Capacity factor, 2025	0.200
Net generation (MWh), 2025	484,790
Balancing authority code	CISO

Solar arrays

Array area (acres): 1,654.2
AC capacity (MW): 205.3
DC capacity (MW): 257.7
Mounting: Single-axis tracking
Site type: Greenfield
Began operating: 2016

Source USPVDB

Source

U.S. Large-Scale Solar Photovoltaic DatabaseOpen license · retrieved 25 Oct 2026Map services and data are available from Large-Scale Solar Photovoltaic Database, provided by the U.S. Geological Survey and Lawrence Berkeley National Laboratory via https://energy.usgs.gov/uspvdb

Attribution

Ownership

3 companies

Companies with an ownership or operating interest in this asset.
Company	Role	Share	As of	Source
Southern Power Co	Operator			EIA-860M
SP Tranquillity Solar Storage, LLC	Owner	26.0%	31 Dec 2025	EIA-860
RE Tranquillity LLC	Owner	74.0%	31 Dec 2025	EIA-860

Timeline

2016 In service · EIA-860M

Sources

6 sources

Sources EIA-860M · GEM · USPVDB · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules

Sources

EIA-860M Preliminary Monthly Electric Generator InventoryOpen license · retrieved 4 Nov 2026
Global Energy Monitor — Global Integrated Power Tracker (unit-level power plants, eight technologies, all statuses)Open license, with credit · retrieved 26 Oct 2026Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
U.S. Large-Scale Solar Photovoltaic Database (USPVDB) — USGS and LBNL; one row per facility with its array footprintOpen license · retrieved 25 Oct 2026Map services and data are available from Large-Scale Solar Photovoltaic Database, provided by the U.S. Geological Survey and Lawrence Berkeley National Laboratory via https://energy.usgs.gov/uspvdb
EIA Open Data bulk file — Electricity (ELEC.zip; monthly plant net generation and fuel consumption since 2001)Open license · retrieved 1 Nov 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
EIA-860M Preliminary Monthly Electric Generator Inventory
EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules

Every source and license · Attribution

View at source

Around this plant

Nearby

Projects within 25 km, nearest first.
Project	Kind	Away	MW
EDPR CA Solar Park VI LLC (CA) Hybrid Under construction	Solar + storage	5.4 km	241
EDPR Scarlet III Under construction	Storage	5.7 km	70
Giffen Withdrawn	Solar	9.7 km	10
Little Bear Solar 2, LLC Contracted	Solar + storage	15.0 km	20
Iron BESS Under construction	Storage	17.4 km	59.5
Midway BESS Under construction	Storage	17.4 km	124.6
Darden I Solar Contracted	Solar + storage	18.8 km	1,150

Sources EIA-860M · CAISO

Sources

EIA-860M Preliminary Monthly Electric Generator InventoryOpen license · retrieved 4 Nov 2026
CAISO Public Queue ReportOpen license, with credit · retrieved 10 Nov 2026Source: California ISO

Attribution