Sonoco Products Co
Darlington County, South Carolina · EIA plant ID 57919 · Operator: Sonoco Products Co
Nameplate41MWSummer 41 MW
Generators3in service
Net generation67GWh12 mo to Aug 2026
Capacity factor17%other units, summer MW
Heat rate5,143Btu/kWhfossil units, electric fuel, HHV
First online1947
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), other 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) |
|---|---|---|---|
| 2011 | 91.6 | — | 14,201 |
| 2012 | 80 | — | 14,784 |
| 2013 | 54 | — | 16,888 |
| 2014 | 107.9 | 105.6% | 12,975 |
| 2015 | 114.3 | 119.2% | 12,905 |
| 2016 | 150.9 | 151.6% | 4,454 |
| 2017 | 128.6 | 128.6% | 4,990 |
| 2018 | 110.2 | 100.5% | 4,987 |
| 2019 | 106.1 | 27.1% | 4,944 |
| 2020 | 108 | 25.2% | 4,935 |
| 2021 | 97.4 | 21.9% | 5,047 |
| 2022 | 25 | 5.0% | 6,561 |
| 2023 | 57.7 | 14.6% | 5,632 |
| 2024 | 65.3 | 17.3% | 5,613 |
| 2025 | 65.4 | 17.4% | 5,321 |
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 |
|---|---|---|---|---|---|---|---|---|
| 2 | Natural Gas Steam Turbine | ST | 2.5 | 2.5 | Jun 1950 | Operating (Standby / backup) | — | coming soon |
| 3 | Wood/Wood Waste Biomass | ST | 10 | 10 | Feb 1947 | Operating | — | coming soon |
| 4 | Wood/Wood Waste Biomass | ST | 28 | 28 | Jun 1957 | Operating | — | coming soon |
Owner / operator
Operator: Sonoco Products Co. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sonoco Products Co | 100.0% | 41 MW |
Nearby plants
Within 80 km.
| GEB Solar | — | 3.8 km |
| Jefferson Solar | 8 MW | 4.1 km |
| Luz Solar | 1 MW | 4.1 km |
| B & K Solar | — | 4.3 km |
| Chapman Solar | 2 MW | 4.3 km |
| Marshall Solar | 2 MW | 4.5 km |