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Potomac Edison

Maryland Utility Interconnection & net metering rules
Net Metering Allowed1
Supply Side Taps Allowed1
Line Taps Allowed1
Load Taps Allowed1
AC Disconnect RequiredYes

Net metering & export

Net Metering Allowed
1
TOU Utility
0
Post Solar Billing Method
Net Metering
Solar Export Type
N/A
Rebates Offered
1
Deregulated
0
Allows Standby
1

Interconnection & taps

Approval Req To Install
Yes
Interconnection Level
3
Supply Side Taps Allowed
1
Line Taps Allowed
1
Load Taps Allowed
1
Automatic Transformer Upgrade Size
0
Meter Aggregation Allowed
1

System size & offset

System Size Restrictions
0
System Size Restriction Type
No Restrictions
System Size Battery Included
0
System Size Includes Existing Systems
0
Offset Type
Percentage
Offset Value
200
Offset Calculation Basis
Historical
Offset Calculation Period
12
Industry Standard Watts Sqft
2
System Offset Notes


Offset Calc Tool
Historical Usage

Metering & disconnect

Production Meter Required
No
Production Meter Position
N/A
Production Meter Labeling
N/A
AC Disconnect Required
Yes
AC Disconnect Labeling
Utility Disconnect Switch

Plans & docs

Site Plan Reqs
  • Overall property layout and street access including North arrow orientation and the nearest cross street in each direction. (Indicate direction of nearest cross street if impractical to show on drawing).
  • Identify utility meter, inverter and/or associated generation and storage (battery) equipment.
  • An external disconnect is required within 10 feet of the meter location.
  • Ground mounted installations must show clearances and details of surrounding structures especially how they cross the Company's facilities. The route and length of the electrical connection to the premise is also required.
SLD Reqs
  • Energy source (PV array, wind turbine, etc.). Please indicate DC and AC ratings as appropriate.
  • Please indicate AC rating of the inverter.
  • Identify the make and model of the disconnect switch and note if it is lockable with a visible break when required.
  • Identify connection to Customer’s electrical system.

BATTERY JOBS

  • For Tesla Powerwalls: A single disconnect can be used to isolate both sources (PV solar and battery) OR a second visible-break disconnect switch can be used for the battery(s). The Tesla Gateway does not take the place of the required disconnect.
Install Reqs


Placards
  • See Signage Requirements
  • The switch shall be clearly marked, "Generator Disconnect Switch”, with permanent 3/8 inch or larger letters.
Electrical Stamp Required
0
Meter Num Req SLD 3LD
0
ESID Num Req SLD 3LD
0
Website
link
Phone
(800) 686-0011

Other details

Restrict Inspection
0
Address ID
169999
Express Planset Eligible
Yes
Compiled from public records, 2026. Tariffs and interconnection rules change; verify with Potomac Edison before you rely on this. The useful move: if an installer says you need a main panel upgrade, ask how these tap and interconnection policies were considered first.