Green Power 2
Galveston County, Texas · EIA plant ID 55470 · Operator: South Houston Green Power LLC
Nameplate861MWSummer 624 MW
Generators5in service
Net generation4,166GWh12 mo to Aug 2026
Capacity factor76%gas/coal/oil units, summer MW
Heat rate4,958Btu/kWhfossil units, electric fuel, HHV
First online2003Runs as baseload
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), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2003 | 192.8 | 44.4% | 5,714 |
| 2004 | 3,246.4 | 63.3% | 4,795 |
| 2005 | 2,841.2 | 55.5% | 4,795 |
| 2006 | 2,246.9 | 43.9% | 4,795 |
| 2007 | 3,253.2 | 63.6% | 4,795 |
| 2008 | 3,268.8 | 63.7% | 4,795 |
| 2009 | 3,784.2 | 57.9% | 4,795 |
| 2010 | 4,054.5 | 56.1% | 4,853 |
| 2011 | 3,669.1 | 50.7% | 4,959 |
| 2012 | 4,514.3 | 62.3% | 4,824 |
| 2013 | 3,952.4 | 54.7% | 4,798 |
| 2014 | 4,203.6 | 58.1% | 4,808 |
| 2015 | 4,357 | 60.3% | 4,813 |
| 2016 | 4,474.6 | 61.7% | 5,003 |
| 2017 | 4,416.9 | 80.8% | 5,013 |
| 2018 | 3,900.3 | 71.4% | 5,000 |
| 2019 | 4,010.6 | 73.4% | 5,004 |
| 2020 | 4,034.3 | 73.6% | 4,966 |
| 2021 | 4,131.7 | 75.6% | 4,962 |
| 2022 | 3,786.8 | 69.3% | 4,979 |
| 2023 | 3,784.8 | 69.2% | 4,966 |
| 2024 | 3,879.1 | 70.8% | 4,969 |
| 2025 | 3,861.2 | 70.6% | 4,970 |
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 |
|---|---|---|---|---|---|---|---|---|
| ST1 | Natural Gas Fired Combined Cycle | CA | 110 | 75 | Dec 2003 | Operating | — | coming soon |
| ST805 | Natural Gas Fired Combined Cycle | CA | 250 | 75 | May 2009 | Operating (Out of service) | — | coming soon |
| TR1 | Natural Gas Fired Combined Cycle | CT | 167 | 158 | Dec 2003 | Operating | — | coming soon |
| TR2 | Natural Gas Fired Combined Cycle | CT | 167 | 158 | Dec 2003 | Operating | — | coming soon |
| TR3 | Natural Gas Fired Combined Cycle | CT | 167 | 158 | Dec 2003 | Operating | — | coming soon |
Owner / operator
Operator: South Houston Green Power LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Marathon Petroleum Company LP | 100.0% | 861 MW |
Nearby plants
Within 80 km.
| Power Station 4 | 191 MW | 1 km |
| Texas City Power Plant | 450 MW | 1.1 km |
| Texas City Plant Union Carbide | 26 MW | 1.3 km |
| Zeya | — | 1.9 km |
| GCWA | 7 MW | 2 km |
| Heights | 10 MW | 2.1 km |