Potomac Edison Garrett College

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.

McHenry has 6 charging stations in the DOE registry with 15 ports. Potomac Edison Garrett College accounts for 13% of the charging ports in McHenry. ChargePoint runs 4 stations in McHenry. 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 Sep 12, 2020, one of 85 stations in Maryland with a 2020 open date. The station's record was last updated at the source on Oct 12, 2026.