Maryland Interconnection

If you are interested in interconnecting small generation with the Potomac Edison's distribution system you must first determine the size and type of equipment which best suits your requirements in accordance with the Company's Tariff.  The Interconnection Tariff rate schedule is available on the Company's Maryland tariffs page.

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*. 

• Level 1 - less than or equal to 20 kW, Inverter-based
  
• Level 2, 3, and 4 - generation size is greater than 20 kW

No application fees will be charged at this time.  Fees displayed during the current application submission process can be disregarded.

You are required to submit a site plan and one-line diagram with your application.  The online application allows you to attach these documents during the fourth step of the application process.

Submit Site Plan

• Site Plan Example
  

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

• 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).
• 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.
• Location of the DER AC disconnect meeting the requirements of the NEC - for self-contained metering locations.
• Location of the DER utility required AC visible break disconnect - for metering locations utilizing instrument transformers.
• Location of generation, inverter, storage and associated electrical equipment. 
• Location of service transformer.

Submit One-Line Diagram

• PV Example
• Turbine Example

The one-line diagram must include:

• 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.
• Identify utility meter, inverter and/or associated generation and storage (battery) equipment.

Complete Your Application: Online OR Paper 

NEW Online Portal Now Available
We are excited to announce the launch of our new online interconnection Portal! The online portal will make the application process more convenient and efficient for you. We strongly encourage you to explore the benefits of using the new portal and are interested in your feedback. 

Interconnection Portal

Paper Applications

• Level 1 Application - ≤ 20 kW, Inverter based
• Level 2, 3, and 4 Application - Greater than 20 kW to 10MW or less
• Net Energy Metering Rider Application
  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: http://www.dsd.state.md.us/comar/SubtitleSearch.aspx?search=20.50.10.*

How to Submit Applications, Fees and Status Questions