Utility / operator
Potomac Electric Power Co
26,329 recorded solar installations interconnected by Potomac Electric Power Co — mostly in Maryland.
Dataset updated . Sources: LBNL Tracking the Sun + permits + state programs + USGS/EIA utility-scale.
Installations interconnected
26,329
Total capacity
233.1 MW
DC nameplate
States
2
Median size
115 kW
Median $/W
$6.50/W
pre-incentive
Third-party owned
0%
lease / PPA
Growth
Installations by year
2004
1
2009
2
2011
2
2012
1
2013
166
2014
1,660
2015
3,550
2016
6,549
2017
3,168
2018
1,635
2019
1,348
2020
1,581
2021
2,239
2022
2,425
2023
1,026
2024
452
2025
477
2026
42
Latest records
Most recent recorded installs
| Date | Location | Size | $/W | Segment |
|---|---|---|---|---|
| Feb 11, 2026 | Washington, DC | — | — | COM |
| Feb 11, 2026 | Washington, DC | — | — | COM |
| Feb 10, 2026 | Washington, DC | — | — | COM |
| Feb 10, 2026 | Washington, DC | — | — | COM |
| Feb 2, 2026 | Washington, DC | — | — | COM |
| Feb 2, 2026 | Washington, DC | — | — | COM |
| Feb 2, 2026 | Washington, DC | — | — | COM |
| Jan 28, 2026 | Washington, DC | — | — | COM |
| Jan 27, 2026 | Washington, DC | — | — | COM |
| Jan 27, 2026 | Washington, DC | — | — | COM |
See all 26,329 installations →searchable & filterable; export to CSV with a free account
Service geography
- Maryland
- 23,943
- District of Columbia
- 2,386
Frequently asked questions
How many solar installations has Potomac Electric Power Co interconnected?
PanelCensus records 26,329 installations interconnected by Potomac Electric Power Co, from Nov 1, 2004 to Feb 11, 2026, totalling 233.1 MW of capacity across 2 states. Coverage varies by state, so actual totals may be higher.
Where does Potomac Electric Power Co operate?
Most recorded activity is in Maryland (23,943), District of Columbia (2,386).