Papago Energy Storage
Battery storage project in Maricopa County, Arizona. 300 MW of nameplate capacity across 1 generator, operated by RE Papago LLC.
Also known as EIA plant 66779
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 300 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- May 2025First generator online
- Operator
- RE Papago LLCEIA operator ID 65751
- Grid
- AZPSBalancing authority AZPS
- Price nodes
- None linkedNo verified ISO node
- Location
- Maricopa County, AZ33.4836, −113.0378
- EIA plant ID
- 66779EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Papago Energy Storage produces
Free · EIA-923Net generation, 2025
0 MWh
0 MWh, final. 8 of 12 months reported
Battery discharge, 2025
0 MWh
Charge 0 MWh
January to July 2026
0 MWh
Provisional
| 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 | 0 | Not reported | 8 of 12 |
| 2026 (provisional, partial year) | 0 | Not reported | 7 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 |
|---|---|---|---|
| PPABA | Batteries | 300.0 | May 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 RE Papago LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
300 analyst questions a month, plus MCP
Query Papago Energy Storage and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Papago Energy Storage
Questions about Papago Energy Storage
How much power does Papago Energy Storage produce?
Papago Energy Storage reported 0 MWh (0 MWh) of net generation in 2025. From January to July 2026 it reported 0 MWh, which is provisional. 8 of 12 months were reported for 2025.
Where is Papago Energy Storage?
Papago Energy Storage is in Maricopa County, Arizona, at 33.4836, −113.0378. It is in the Arizona Public Service Company balancing area (AZPS).
Who operates Papago Energy Storage?
EIA-860M for August 2026 lists RE Papago LLC as the operator (EIA operator ID 65751). The operator is not always the owner.
When did Papago Energy Storage start operating?
Its first generator began operating in May 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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page