TX21 River Valley Storage 2
Williamson County, Texas · EIA plant ID 65700 · Operator: Key Capture Energy
Nameplate50MWSummer 50 MW
Generators1in service
Net generation-9GWh12 mo to Aug 2026
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online2023
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2023 | -1.2 | — | — |
| 2024 | -4.5 | — | — |
| 2025 | -7.1 | — | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| TX21 | Batteries | BA | 50 | 50 | Jul 2023 | Operating | — | coming soon |
Owner / operator
Operator: Key Capture Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Key Capture Energy | 100.0% | 50 MW |
Nearby plants
Within 80 km.
| TX19 River Valley Storage 1 | 50 MW | 0.2 km |
| East Blackland Solar Project 1 | 144 MW | 10.2 km |
| Sandow Lakes Energy Station | — | 15.7 km |
| TX12 Silicon Hill Storage | 100 MW | 21 km |
| WAL5479 | 1 MW | 24.4 km |
| Webberville Solar Project | 30 MW | 24.5 km |