Solar energy: SRP’s commitment to the future
Advancing solar energy in Arizona
Homes and businesses across the Valley have long relied on more traditional power plants for energy. As we move toward a more sustainable future, SRP is diversifying our energy generation mix with renewable resources, including utility-scale solar projects.
As part of our goal, SRP is developing over 1,500 megawatts (MW) of additional large-scale solar. Once online, these assets will push our total solar energy to more than 2,025 MW — enough to power 450,000 average-size homes.
How much solar and battery storage does SRP have?
For more than 10 years, SRP has steadily been investing in utility-scale solar energy to meet the clean energy demands of our customers. Recently, advancements in state-of-the-art battery storage have allowed SRP to extend the life of solar to meet energy demand during peak hours of the day and at night.
| Project | Nameplate Capacity MW | Commercial Operation Date |
|---|---|---|
| Co Bar Solar | 794 MW | By 2027 |
| Signal Butte Battery | 250 MW | By mid-year 2026 |
| Copper Crossing, Phase II, Advanced Solar | 55 MW | 2025 |
| Flatland Energy Storage Project | 200 MW, 4-hour battery | 2025 |
| Eleven Mile Solar + Battery | 300 MW + 4-hour battery | 2024 |
| Superstition Energy Storage | 90 MW, 4-hour battery | 2024 |
| Sierra Estrella Energy Storage | 250 MW, 4-hour battery | 2024 |
| Brittlebush Solar | 200 MW | 2024 |
| Storey Energy Center | 88 MW + 88 MW, 3-hour battery | 2023 |
| Sonoran Solar Energy Center | 260 MW + | 2023 |
| Saint Battery | 100 MW + 4-hour battery | 2023 |
| West Line Solar | 100 MW | 2022 |
| Agua Fria | 25 MW | 2021 |
| Central Line Solar | 100 MW | 2021 |
| Bolster Battery | 25 MW + 4-hour battery | 2021 |
| East Line Solar | 100 MW | 2020 |
| Saint Solar | 100 MW | 2020 |
| Pinal Central Energy Center, Casa Grande | 20 MW + 10 MW 4-hour battery | 2018 |
| Apple Solar | 52.25 | 2017 |
| Kayenta 1, Navajo Nation | 27 MW | 2017 |
| Kayenta 1, Navajo Nation | 27 MW | 2017 |
| Sandstone Solar Facility, Florence | 45 MW | 2015 |
| Queen Creek Solar, Queen Creek | 19 MW | 2012 |
| Copper Crossing Solar Ranch, Florence | 20 MW | 2011 |
Utility-scale battery storage
SRP is investing not just in utility-scale solar systems but also in utility-scale storage systems. Since 2019, SRP has been investing in energy storage. Our projects include:
- 25 MW Bolster Substation Battery System at the Agua Fria Generating Station in Glendale
- 10 MW battery storage integrated with 20 MW solar system at the Pinal Central Solar Energy Center in Casa Grande
We also have approximately 150 MW of energy storage via pump-back capability at both Mormon Flat and Horse Mesa dams. These systems effectively act as large batteries, pumping water uphill when energy costs are low and running the water through turbines when the energy is needed the most.
By scaling our capability to store solar energy, we’ll be prepared to supply power on overcast days, during storms and at night.
Join us in our carbon reduction goal
Join SRP in creating a more sustainable future.
Plant desert-friendly shade trees to keep your home cool.
Switch to an electric vehicle and charge during off-peak hours.
Make your next home an ENERGY STAR® home and use 25% to 50% less energy.
Offset your energy use with solar energy.
