Battery storage projects in the US, planned and operating
The FieldProspects database lists 2,444 planned battery storage projects in the United States totalling 435.8 GW, which is 8 times the 54.5 GW of battery storage now operating. Texas accounts for 189.4 GW of the planned total, and planned entries that state a capacity average 184 MW against 48.1 MW for operating units.
Data as of
How is battery storage capacity measured here?
Battery storage capacity is the power a battery system can deliver at one moment, stated in megawatts. It is not the energy the system holds, which is measured in megawatt-hours and is not what the figures on this page add up.
Planned versus operating battery storage
Planned battery storage is 8 times the operating fleet on capacity and 2.2 times on entries. Among entries that state a capacity, the planned ones also run larger: 184 MW on average against 48.1 MW for operating units.
75 planned battery entries state no capacity, so the 435.8 GW total is a floor. Of the three technology pages, batteries have the strongest developer coverage among operating units, which is covered further down.
| Planned projects | 2,444 |
|---|---|
| Planned capacity | 435.8 GW |
| Operating projects | 1,134 |
| Operating capacity | 54.5 GW |
| Planned projects with a developer attributed | 54.8% (1,340 of 2,444) |
| Operating projects with a developer attributed | 42.7% (484 of 1,134) |
Where battery storage is planned: the leading states
Texas has 43.4% of planned battery capacity, 189.4 GW across 1,065 projects, and California follows at 83.2 GW. Together they hold 62.5%. The first five states hold 73.3%, a tighter concentration than solar or natural gas show.
The newer markets stand out when planned capacity is set against what operates today. Illinois has 17.8 GW planned against 102.3 MW operating, and New York 14.3 GW against 290.7 MW.
| State | Planned projects | Planned capacity | Operating projects | Operating capacity |
|---|---|---|---|---|
| Texas | 1,065 | 189.4 GW | 262 | 18.4 GW |
| California | 371 | 83.2 GW | 308 | 16.3 GW |
| Illinois | 80 | 17.8 GW | 9 | 102.3 MW |
| Arizona | 46 | 15 GW | 60 | 6.6 GW |
| New York | 130 | 14.3 GW | 60 | 290.7 MW |
| Michigan | 74 | 12.7 GW | 4 | 120.3 MW |
| Virginia | 96 | 11.5 GW | 5 | 230.6 MW |
| Nevada | 35 | 11.2 GW | 18 | 2.1 GW |
| Indiana | 69 | 10.7 GW | 9 | 587.3 MW |
| Oklahoma | 53 | 7.2 GW | 5 | 432 MW |
Battery Storage by grid
ERCOT plans 186 GW of batteries, 1.8 times CAISO's 100.6 GW, and the two grids together hold 65.8% of the planned total. MISO is third at 45.9 GW. Each grid links to its own queue page where one exists.
| Grid | Planned projects | Planned capacity | Operating projects | Operating capacity |
|---|---|---|---|---|
| ERCOT | 1,047 | 186 GW | 261 | 18.2 GW |
| California ISO (CAISO) | 415 | 100.6 GW | 310 | 17.1 GW |
| Midcontinent ISO (MISO) | 280 | 45.9 GW | 42 | 1.2 GW |
| PJM Interconnection | 246 | 38.5 GW | 44 | 685.9 MW |
| Southwest Power Pool (SPP) | 149 | 21.3 GW | 16 | 490.5 MW |
| New York ISO (NYISO) | 132 | 14.4 GW | 59 | 288.7 MW |
| ISO New England | 52 | 8.1 GW | 157 | 1 GW |
| Arizona Public Service | 18 | 4.8 GW | 28 | 3.2 GW |
| Not assigned to a grid | 3 | 31.5 MW | 13 | 202.7 MW |
When planned battery storage is expected in service
Battery entries cluster in the near term. 2028 is both the busiest year by entries, 651, and by capacity, 124.1 GW, and 2027 is next with 543 entries. Dated entries expected by the end of 2029 hold 75% of planned battery capacity.
198 entries carry a year before 2026 and 67 carry no date, 10.8% of the list together.
| Expected in-service year | Projects | Capacity | Share of capacity |
|---|---|---|---|
| Before 2026, still listed as planned | 198 | 27.6 GW | 6.3% |
| 2026 | 315 | 34.3 GW | 7.9% |
| 2027 | 543 | 84.8 GW | 19.5% |
| 2028 | 651 | 124.1 GW | 28.5% |
| 2029 | 403 | 83.8 GW | 19.2% |
| 2030 | 154 | 32.9 GW | 7.6% |
| 2031 | 79 | 22.4 GW | 5.1% |
| 2032 | 15 | 5.6 GW | 1.3% |
| 2033 | 11 | 5 GW | 1.1% |
| 2034 | 6 | 2.2 GW | 0.5% |
| 2035 | 2 | 556.3 MW | 0.1% |
| No expected date | 67 | 12.6 GW | 2.9% |
| All planned projects | 2,444 | 435.8 GW | 100% |
The five largest planned battery storage entries
The largest planned battery entry shown is 2.2 GW. Two of the five shown, Sunstone Solar and Wingtip Solar 1, are named like solar plants although the source files them as battery storage, so a storage entry can share its name with a solar site. Each figure is that entry alone.
| Entry name | Capacity |
|---|---|
| Atlas Complex | 2.2 GW |
| Aurora E.C. 138kV | 1.2 GW |
| Sunstone Solar | 1.2 GW |
| Wingtip Solar 1 | 1.2 GW |
| Muon | 1.2 GW |
What the database adds for battery storage
A developer is attributed on 54.8% of planned battery projects (1,340 of 2,444) and 42.7% of operating ones. Across all technologies only 7.6% of operating projects have a developer attributed, so batteries are the exception.
Where a developer is attributed, the database also holds the contacts at the company, so a battery pipeline can be worked as a list of companies and the people who run them.
Source. U.S. Energy Information Administration Form EIA-860M and ISO/RTO interconnection queues, compiled by FieldProspects.
Related pages
- Power projects Planned and operating capacity for each technology, with the states and grids leading it.
- Natural gas Planned and operating natural gas in the database, by state, grid and in-service year.
- Solar Planned and operating solar in the database, by state, grid and expected in-service year.
- Developers The companies behind power projects, with attributed project counts and benchmark figures.
- Data center site selection Compare states and grids by planned and existing generation to find where power is available.
- CAISO Planned and operating projects on the CAISO grid, by technology, state and in-service year.
- Largest solar developers Solar developers ranked by attributed project count and capacity, with how much of the market is attributed.
- FieldProspects vs Cleanview A dated comparison of what each product costs and includes, using only public information.
- About What FieldProspects is, what is in the database, and where the data comes from.