Flatland Storage
Battery storage project in Pinal County, Arizona. 200 MW of nameplate capacity across 1 generator, operated by Flatland Storage LLC.
Also known as Flatland Energy Storage Project · EIA plant 68529
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 200 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2025First generator online
- Operator
- Flatland Storage LLCEIA operator ID 66908
- Grid
- SRPBalancing authority SRP
- Price nodes
- None linkedNo verified ISO node
- Location
- Pinal County, AZ32.9192, −111.4989
- EIA plant ID
- 68529EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Flatland Storage produces
Free · EIA-923Net generation, 2025
Not reported
Not reported MWh, final. 0 of 12 months reported
Battery discharge, 2025
Not reported
Charge Not reported
January to July 2026
−44.3 GWh
Provisional. 5 of 7 months reported
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | Not reported | Not reported | 0 of 12 |
| 2025 | Not reported | Not reported | 0 of 12 |
| 2026 (provisional, partial year) | −44,271 | Not reported | 5 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| FS01 | Batteries | 200.0 | December 2025 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Flatland Storage LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Power plants near Flatland Storage
Questions about Flatland Storage
Where is Flatland Storage?
Flatland Storage is in Pinal County, Arizona, at 32.9192, −111.4989. It is in the Salt River Project balancing area (SRP).
Who operates Flatland Storage?
EIA-860M for August 2026 lists Flatland Storage LLC as the operator (EIA operator ID 66908). The operator is not always the owner.
When did Flatland Storage start operating?
Its first generator began operating in December 2025, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page