The 3 kW photovoltaic (PV) system

Historical marker location:

370 L'Enfant Plaza Southwest, Southwest Federal Center, District of Columbia

( Marker is on L'Enfant Plaza Southwest south of Independence Avenue Southwest, on the right.)

The District was originally called "Federal City": The name "Washington, D.C." was not officially adopted until the late 19th century. Before that, the city was referred to as "Federal City" or simply "Washington."