50 Upper Rock Upper Rock Grg

Of its 2 ports, 2 are Level 2. Level 2 ports are 240-volt AC chargers, typically used where a car is parked for an hour or more. That is about 41% below the Maryland average of 3.4 ports per station. The registry lists one connector type: J1772, the standard Level 1/2 AC connector.

Rockville has 92 charging stations in the DOE registry with 271 ports, the 3rd-most of 248 cities and towns in Maryland. 50 Upper Rock Upper Rock Grg accounts for under 1% of the charging ports in Rockville. ChargePoint runs 41 stations in Rockville. Statewide, Maryland has 1,866 stations and 6,365 ports, the 16th-largest station count of the 51 states and DC. The biggest station in Maryland, Aberdeen Proving Grounds in Aberdeen, has 36 ports.

The largest US charging network by station count — mostly Level 2 at workplaces, retail and municipal sites. ChargePoint operates 48,998 stations in the registry across 52 states, with 5,017 DC fast and 83,427 Level 2 ports in total. 659 of those stations are in Maryland, 35% of the state's 1,866.

“Available” means the station is open and in service according to the DOE registry. Its access code is public, meaning it is listed as open to any driver. It opened on Dec 10, 2024, one of 167 stations in Maryland with a 2024 open date. The station's record was last updated at the source on Oct 12, 2026.