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Public utilities

Vermont Public Utility Commission Issues Order on Solar Net-Metering System

Strategic Insights

— 2 min read

The Vermont Public Utility Commission has resolved an interconnection issue and deemed a certificate of public good ("CPG") issued for a proposed 11.35 kW solar net-metering electric power system in Waitsfield, Vermont. The system, submitted by John Lacey, was initially registered as a 16.1 kW roof-mounted solar net-metering system but was later amended to reduce its capacity. Green Mountain Power Corporation raised concerns about the proposed interconnection, citing a need for a distribution transformer upgrade and compliance with the Inverter Source Requirement Document of ISO New England. However, the Applicant agreed to cover the cost of the upgrade and ensure compliance with the inverter requirements.

Key Takeaways:

  • The Vermont Public Utility Commission issued an order resolving an interconnection issue for a proposed 11.35 kW solar net-metering electric power system in Waitsfield, Vermont (Case No. 24-0104-NMR).
  • The system, submitted by John Lacey, was initially registered as a 16.1 kW roof-mounted solar net-metering system but was later amended to reduce its capacity (from 16.1 kW to 11.35 kW).
  • Green Mountain Power Corporation raised two main concerns about the proposed interconnection: (1) the distribution transformer requires an upgrade, which must be covered by the Applicant, and (2) the inverters used for the Project must comply with the Inverter Source Requirement Document of ISO New England.
  • The Applicant agreed to cover the cost of the distribution transformer upgrade and ensure compliance with the inverter requirements, resolving the interconnection issue.
  • A certificate of public good ("CPG") is deemed issued for the Project, and the Applicant may commence installation within one year of the date of the Order (February 15, 2024).
  • The Project must be commissioned within one year of the order date (February 15, 2024, plus one year, making it February 15, 2025).
  • The Applicant will be responsible for covering the cost of the distribution transformer upgrade.

Statistics:

  • The proposed solar net-metering system in Waitsfield, Vermont, has a capacity of 11.35 kW.
  • The initial registration for the system was for a 16.1 kW roof-mounted solar net-metering system.
  • Green Mountain Power Corporation filed a letter raising concerns about the proposed interconnection on January 24, 2024.
  • The Applicant responded to the concerns on January 24, 2024, agreeing to cover the cost of the distribution transformer upgrade and ensure compliance with inverter requirements.
  • The Applicant has one year from the date of the Order (February 15, 2024) to commence installation of the Project.
  • The Project must be commissioned within one year of the order date (February 15, 2025).

Sources:

  • Vermont Public Utility Commission. (02/15/2024). Case No. 24-0104-NMR. ORDER RESOLVING INTERCONNECTION ISSUE AND FINDING CERTIFICATE OF PUBLIC GOOD ("CPG") DEEMED ISSUED.

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