Utility / plant operator
SOUTHWESTERN ELECTRIC COOP INC - (IL)
6 recorded solar installations interconnected by SOUTHWESTERN ELECTRIC COOP INC - (IL) — mostly in Illinois.
At a glance
SOUTHWESTERN ELECTRIC COOP INC - (IL) is a utility or plant operator with 6 recorded solar installations interconnected, totalling 19.8 MW (as reported), dated 2019 to 2024. All of its located records are in Illinois.
Dataset updated . Sources: LBNL Tracking the Sun + permits + state programs + USGS/EIA utility-scale.
Growth
Installations by year
Latest records
Most recent recorded installs
| Date | Location | Size | $/W | Segment |
|---|---|---|---|---|
| Apr 1, 2024 | IL | 7,317 kW | — | UTILITY |
| Apr 1, 2024 | Louisville, IL | 9,960 kW | — | UTILITY |
| Apr 1, 2024 | Jerseyville, IL | 678 kW | — | COM |
| Apr 1, 2021 | Granite City, IL | 523 kW | — | COM |
| Oct 1, 2020 | Belleville, IL | 635 kW | — | COM |
| Oct 1, 2019 | IL | 661 kW | — | COM |
Service geography
How does SOUTHWESTERN ELECTRIC COOP INC - (IL) compare with other utilities & plant operators?
Its median system is 669.5 kW, about 98 times the median of 6.8 kW for all recorded installations. Utilities & plant operators with similar recorded volume include Sacramento Municipal Util Dist (56,197), San Diego Gas & Electric Co. (52,118) and Potomac Electric Power Co (40,361).
How has SOUTHWESTERN ELECTRIC COOP INC - (IL)'s installation volume changed?
The earliest dated installation interconnected by SOUTHWESTERN ELECTRIC COOP INC - (IL) is from 2019. The busiest year on record is 2024, with 3 installations. The most recent dated record is from Apr 1, 2024.
Where are SOUTHWESTERN ELECTRIC COOP INC - (IL)'s solar installations?
All of its located installations are in Illinois. The places with the most records are Granite City, IL (1), Louisville, IL (1), Jerseyville, IL (1) and Belleville, IL (1).
Frequently asked questions
How many solar installations has SOUTHWESTERN ELECTRIC COOP INC - (IL) interconnected?
PanelCensus records 6 installations interconnected by SOUTHWESTERN ELECTRIC COOP INC - (IL), from Oct 1, 2019 to Apr 1, 2024, totalling 19.8 MW of capacity across 1 state. Coverage varies by state, so actual totals may be higher.
Where does SOUTHWESTERN ELECTRIC COOP INC - (IL) operate?
Most recorded activity is in Illinois (6).
How large are SOUTHWESTERN ELECTRIC COOP INC - (IL)'s solar installations?
The median recorded installation is 669.5 kW, against 6.8 kW for all recorded installations; total recorded capacity is 19.8 MW.
When was SOUTHWESTERN ELECTRIC COOP INC - (IL)'s most recent recorded solar installation?
The latest dated record is from Apr 1, 2024. Public registers report with a lag, so newer installations may not appear yet.
Why does SOUTHWESTERN ELECTRIC COOP INC - (IL) appear on rooftop solar records?
On distributed (rooftop and commercial) records the operator field names the utility the system interconnects with; on utility-scale plants it names the plant operator. SOUTHWESTERN ELECTRIC COOP INC - (IL)'s profile counts both.
Related utilities & plant operators and places
- All utilities & plant operators· 191 profiles
- Solar in Illinois· 6 interconnected by SOUTHWESTERN ELECTRIC COOP INC - (IL)
- Sacramento Municipal Util Dist· 56,197 installations
- San Diego Gas & Electric Co.· 52,118 installations
- Potomac Electric Power Co· 40,361 installations
- Pacific Gas & Electric Co.· 31,251 installations
- Baltimore Gas & Electric Co· 27,272 installations
- CONSOLIDATED EDISON CO-NY INC· 26,655 installations
About this data
Source: Lawrence Berkeley National Laboratory's Tracking the Sun, merged with city permit records, state incentive programs and the USGS U.S. Large-Scale Solar Photovoltaic Database / EIA-860 plant registers, as published October 19, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.
Cite as: PanelCensus, “SOUTHWESTERN ELECTRIC COOP INC - (IL), utility / plant operator”, https://panelcensus.com/operators/southwestern-electric-coop-inc-il-437 (data as of October 19, 2026).