Please review the process flowcharts for an overview of how applications are processed. The flowcharts detail customer actions, company actions, forms at each step.

• Level 1
• Level 2
• Level 3
• Level 4

Below are copies of the standard MPUC forms used for applications, interconnection agreements, and certificate of completion.

• Forms and Agreements 1: Definitions
• Forms and Agreements 2 - Level 1: Application
• Forms and Agreements 3 - Level 1: Interconnection Agreement
• Forms and Agreements 4 - Levels 2, 3 & 4: Interconnection Application
• Forms and Agreements 5 - Levels 2, 3, & 4: Interconnection Agreement
• Forms and Agreements 6: Certificate of Completion

• Pre-Application (Optional, ≥500kW)
  • $300 non-refundable

• Ombudsman Fee
  • Effective as of December 11, 2024 the Maine Public Utilities Commission (MPUC), as seen within MPUC Chapter 328, has made it a requirement for the utilities to collect a $40.00 Interconnection Ombudsman Fee per application.
  • Level 1-4 = $40

• Application Fees
  • Level 1 = $100
  • Level 2 = $100 + $2 per kW
  • Level 3 = $100 + $3 per kW
  • Level 4 = $3,000
• Cost-Sharing
  • Level 1 = $150
  • Level 2 = $25/kW (On-Site-Load Customers, 25kW–250kW)
  • Level 3 = n/a
  • Level 4 = n/a

Below are the single-line diagrams depicting approved configurations for Chapter 324 projects with Generator-owned communications (set-ups other than residential smart-meters).

• Communication Scheme Diagram (kWH Only)
• Communication Scheme Diagram (Tariff Only)
• powerWatch Customer Guide with Central Maine Power

Level 2 Online Reports (application tracker): Shows Level 2 Projects that are above 25kW and the substation they applied at. Providing information to developer community on date application submitted, project status, facility capacity, fuel type.

Level 4 Public Queue (Chapter 324 Level 4 Public Queue): Published twice monthly to provide developer community information on queues at CMP substations. Provides information such as queue position, fuel type, circuit name, date application submitted, project status, facility capacity, study start and completion dates, IA signed date, 25% payment.

Summary Cost Sharing Projects by Substation: Provides a per-substation breakout of cost-shareable distribution upgrades such as Line Upgrades or TGFOV

Have questions about the MPUC Chapter 324 interconnection process? Send us an email and we will forward you an invitation for our next monthly Q&A session.

For additional information about the process, please contact us at  207-716-7920.

To apply for Customer Net Energy Billing in Maine, you need to fill out the required Chapter 313 Application. This is in addition to the Interconnection application. For more information on Maine Net Energy Billing (NEB) visit our page.

The "Distributed Generation Developers Guide: From Interconnection Application to Commission and Energization" is written by our DG project managers to answer developers' most frequently asked questions about the processes.

• Distributed Generation Project Costs
• Monthly Developer MPUC Process Presentation
• CMP Hosting Capacity Map
• CMP Distributed Generation - Developer Self Perform Requirements
• CMP Inverter-Based DER Modeling and Source Requirement Document
• DG Cluster Study Workshop
• ISO New England Compliance Bulletin Mod 032

For CMP’s updates to the Transmission Cluster Studies, please see our September presentation.

For updates on CMP’s Transmission System Impact Studies, please see our latest biweekly report.

Have questions related to Reliability Committee (RC) Approval or i.3.9 Approval?

• https://www.iso-ne.com/committees/reliability/reliability-committee/
• https://www.iso-ne.com/system-planning/transmission-planning/proposed-plan-applications/

CMP will no longer include minimum loading on the circuit for Level 4 DG Thermal Analysis

Download our Minimum Loading - DG Level 2 Studies 7-16-2025 presentation

Guide to show developer community how to utilize CMP Hosting Capacity Map.