PanelCensus

Utility / plant operator

UNITED ILLUMINATING CO

13 recorded solar installations interconnected by UNITED ILLUMINATING CO — mostly in Connecticut.

At a glance

UNITED ILLUMINATING CO is a utility or plant operator with 13 recorded solar installations interconnected, totalling 13.4 MW (as reported), dated 2016 to 2022. All of its located records are in Connecticut.

Dataset updated . Sources: LBNL Tracking the Sun + permits + state programs + USGS/EIA utility-scale.

Installations interconnected
13
Total capacity
13.4 MW
as reported
States
1
Median size
827 kW
Median $/W
—
pre-incentive
Third-party owned
0%
lease / PPA

Growth

Installations by year

2016
1
2017
5
2018
3
2019
1
2020
1
2021
1
2022
1

Latest records

Most recent recorded installs

DateLocationSize$/WSegment
Apr 1, 2022North Haven, CT1,653 kW—UTILITY
Jan 1, 2021CT595 kW—COM
Oct 1, 2020Wallingford, CT827 kW—COM
Jul 1, 2019North Haven, CT502 kW—COM
Jan 1, 2018Bridgeport, CT960 kW—COM
Jan 1, 2018Cheshire, CT1,111 kW—UTILITY
Jan 1, 2018CT765 kW—COM
Oct 1, 2017CT1,094 kW—UTILITY
Oct 1, 2017Woodbridge, CT632 kW—COM
Oct 1, 2017CT759 kW—COM

See all 13 installations →searchable & filterable; export to CSV with a free account

Service geography

Connecticut
13

How does UNITED ILLUMINATING CO compare with other utilities & plant operators?

Its median system is 827 kW, about 122 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 UNITED ILLUMINATING CO's installation volume changed?

The earliest dated installation interconnected by UNITED ILLUMINATING CO is from 2016. The busiest year on record is 2017, with 5 installations. 2022 has 1 recorded installation. The most recent dated record is from Apr 1, 2022.

Where are UNITED ILLUMINATING CO's solar installations?

All of its located installations are in Connecticut. The places with the most records are Wallingford, CT (2), Bridgeport, CT (2), North Haven, CT (2), Cheshire, CT (1) and Woodbridge, CT (1).

Frequently asked questions

How many solar installations has UNITED ILLUMINATING CO interconnected?

PanelCensus records 13 installations interconnected by UNITED ILLUMINATING CO, from Jan 1, 2016 to Apr 1, 2022, totalling 13.4 MW of capacity across 1 state. Coverage varies by state, so actual totals may be higher.

Where does UNITED ILLUMINATING CO operate?

Most recorded activity is in Connecticut (13).

How large are UNITED ILLUMINATING CO's solar installations?

The median recorded installation is 827 kW, against 6.8 kW for all recorded installations; total recorded capacity is 13.4 MW.

When was UNITED ILLUMINATING CO's most recent recorded solar installation?

The latest dated record is from Apr 1, 2022. Public registers report with a lag, so newer installations may not appear yet.

Why does UNITED ILLUMINATING CO 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. UNITED ILLUMINATING CO's profile counts both.

Related utilities & plant operators and places

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 29, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.

Cite as: PanelCensus, “UNITED ILLUMINATING CO, utility / plant operator”, https://panelcensus.com/operators/united-illuminating-co-486 (data as of October 29, 2026).