Sun Streams 4
Sun Streams 4 is a battery storage plant in Maricopa County, Arizona, operated by Sun Streams Expansion, LLC. Among the 605 battery storage plants in the country it is the fourth-largest. It is the biggest of Arizona’s 34 battery storage plants. Of its current capacity, 600 MW came online between 2023 and 2025.
Nameplate capacity, 2025
600 MW
600 MW net summer capacity
2 operable units
- Battery300 MW50%
- Solar photovoltaic300 MW50%
Unit by unit, 2025 to 2025
operating in 2025bar height follows unit size
Unit GEN01 Solar photovoltaic, 300 MW, 2025
Unit GEN02 Battery, 300 MW, 2025
Among Arizona’s plants
Largest plants in the state by nameplate capacity, with the plants ranked next to this one.
- 1Palo Verde4,210 MW
- 2Springerville1,779 MW
- 3Santan1,326 MW
- 26Eleven Mile Solar Center600 MW
- 27Harquahala 2600 MW
- 28Sun Streams 4this plant
- 29Kyrene596 MW
- 30H Wilson Sundt Generating Station529 MW
Other rankings
- All US power plants
- 604th of 14,286
- Power plants in Arizona
- 26th of 191
- Plants in the Arizona Public Service balancing area
- 4th of 68
- Biggest single unit, among Arizona’s plants
- 11th of 191
Operable units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN01 | Solar photovoltaic | 300 MW | 300 MW | 2025 | Operating |
| GEN02 | Battery | 300 MW | 300 MW | 2025 | Operating |
Grid and site
- Balancing area
- Arizona Public Service
- Reliability region
- Western Electricity Coordinating Council
- Highest grid connection voltage
- 525 kV
- Nearest town on record
- Tonopah
- Operator type
- Independent producer
- Coordinates
- 33.361°N, 112.780°W
Closest plants
| Plant | Runs on | Capacity | Distance |
|---|---|---|---|
| Sun Streams 3 | Battery storage | 430 MW | 2.7 mi southwest |
| Sun Streams, LLC | Solar | 160 MW | 3.3 mi west |
| Sun Streams 2 | Solar | 150 MW | 3.5 mi southwest |
| Red Hawk | Natural gas | 1,127 MW | 3.9 mi southwest |
| Agave | Solar | 150 MW | 4.3 mi southwest |
| Arlington Valley Solar Energy II | Solar | 129 MW | 5.0 mi southwest |
| Mesquite Generating Station Block 2 | Natural gas | 692 MW | 5.0 mi west |
| Mesquite Generating Station Block 1 | Natural gas | 692 MW | 5.0 mi west |