Procedure to Interconnect Small Generation with the Potomac Edison Distribution System

Prior to completing the application process, a customer interested in interconnecting small generation with the Potomac Edison distribution system must first determine the size and type of equipment to install.

NOTE:  To be eligible for net metering, the nameplate generation capacity limit is 2,000 kW.

The energy sources are restricted to biomass, solar or wind. Additional requirements are contained at Title 20 PUBLIC SERVICE COMMISSION ("PSC"), Subtitle 50 SERVICE SUPPLIED BY ELECTRIC COMPANIES, Chapter 10 Net Metering. The regulations are posted by the Maryland Office of the Secretary of State at:

See the Maryland Net Metering Tariff for additional information.

For more information on Net Metering, click here.

To be eligible for interconnection, the nameplate generation capacity limit is 10,000 kW.

Additional requirements are contained at Title 20 PUBLIC SERVICE COMMISSION; Subtitle 50 SERVICE SUPPLIED BY ELECTRIC COMPANIES, Chapter 9 Small Generator Interconnection Standards. The regulations are posted by the Maryland Office of the Secretary of State at:


Application Process

1. Customer submits application and supporting documents:

A. Submit one of the following completed applications based on the total of the nameplate rating(s) of the inverter(s) or other generation:

B. One-line diagram (PV ExampleTurbine Example)

The one-line diagram must include:

  • Energy source (PV array, wind turbine, etc.). Please indicate DC or AC rating.
  • Inverter, if applicable. Please indicate AC rating.
  • Utility-accessible, visible break disconnect. Note: Molded case circuit breakers do not meet this requirement.
  • Connection to Customer’s electrical system.
  • Connection to utility meter. General location of generation and associated electrical equipment.

C. Site plan (Site Plan Example)

Please do not send overhead internet photos. The site plan must include:

  • Overall property layout and street access including cardinal orientation and nearest cross street (Indicate direction of nearest cross street if impractical to show on drawing).
  • The existing utility meter location. Note: Any proposed changes to the meter location or service must be identified and have prior approval by the Company's Metering & Line Departments.
  • Utility-accessible, visible break disconnect (next to utility meter preferred). Note:  1) In the event the disconnect cannot be reasonably located next to the meter, the location of National Electrical Code-required signage, including adequate description of location and access;  2) Molded case circuit breakers do not meet this requirement.
  • General location of generation and associated electrical equipment.
  • Service transformer, if known.

D. Application Fee (To be submitted with application and supporting documents)

  • Level 1 (20 kW or less, inverter based only) - No Charge
  • Level 2 (inverter based between 20KW & 2MW) - $50.00 + $1.00 per kW
  • Level 3 (Less than 50KW, inverter based connected to the load side of Local Area Network or connected to distribution circuit less than 10MW, both no export permitted) - $100 + $2.00 per KW
  • Level 4 (doesn't meet Level 1,2 or 3) - $100 + $2.00 per KW

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2. Company review

After review by the Company, the customer will be notified if the application is approved or if there are any deficiencies, additional information required or financial requirements to be met. The customer must correct any deficiencies before the Company will approve the application and the facility for installation.

Design Request Assignment to Distribution Specialist

  • If upgrades are required to the Company’s distribution system in order to approve the application, a Design Request Number will be assigned to the project.
  • The Design Request is then assigned to a Distribution Specialist at a local Potomac Edison Company location.
  • The Distribution Specialist will contact the customer to plan the generation interconnection and develop the estimated costs for the system upgrades.

3. Installation

Following approval of the application, the Customer installs the facility in accordance with the Application, PSC rules and the Company's Regulations for Interconnection of Customer-Owned Generation to the FirstEnergy Distribution System.

4. Following installation, the Customer submits final completed documents:

The customer is responsible for contacting their local, city, or county code office for additional permit information and contracting the electrical inspector to schedule an inspection. Upon completion of a satisfactory inspection, the electrical inspector may forward the Certificate of Electrical Approval via the same method as Step 1 above or may sign the Certificate of Completion where designated.

For a list of electrical inspectors, please contact your municipal or county authority.

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5. Final steps by Company

  • Review and approve the as-built installation and final documentation
  • Determine the need for a witness test as provided for in the regulations and notify customer
  • Complete documentation and authorize system operation
    • Note: Generation interconnection should not be energized prior to electrical inspection and receipt of a Certificate of Completion and a Level 1 or Level 2, 3 & 4 Interconnection Agreement, signed by authorized Company personnel.
  • Arrange for the installation of net energy metering, where appropriate

Additional Technical Requirements and References

Submit Completed Documents or Fees

  • Email
  • Fax: 234-678-2505 (Please use highest resolution setting on fax machine)
  • Applications with large attachments that cannot be emailed and any required application fees should be sent to
    Potomac Edison Company
    Regional Engineering
    10802 Bower Avenue
    Williamsport, MD 21795-3016
    Attn: PE-MD Interconnection Coordinator


  • Technical and policy questions regarding interconnection issues should be submitted via email.
  • General metering and billing questions should be directed to Customer Service at 1-800-686-0011.