If you’re a Green Mountain Power customer looking for information about interconnecting your own generation to the grid, you’ve come to the right place. After reviewing the resources outlined below, please contact our team directly at [email protected] or call 802.770.3399 if you need further assistance.
There are several choices when considering interconnecting your generation source. The easiest way to separate them is by size as well as how you’ll be compensated for the power you produce.
Resources
The following codes and standards are required for all interconnection applications or registrations received after November 2, 2018:
- Inverter Source Requirement Document (SRD) of ISO New England (ISO-NE)
- IEEE 1547-2018 replaced both 1547-2003 and 1547a-2014 in February 2018
- IEEE 1547.1a-2015 amended IEEE 1547.1-2005 (note: 1547.1 is currently being revised, with anticipated adoption in late 2018 or 2019)
- UL 1741 (2010) as supplemented by UL1741 SA (2016)
Read GMP’s advisory letter.
The following codes and standards will be required for all interconnection applications or registrations received after January 1, 2023:
- Default New England Bulk System Area Settings Requirement
- IEEE 1547-2018 (as amended by IEEE 1547a-2020) replaced both 1547-2003 and 1547a-2014 in February 2018
- IEEE 1547.1-2020 amended IEEE 1547.1a-2015 in May 2020
- UL 1741 (2010) as supplemented by UL1741 SA (2016) and UL 1741 SB (Third Edition, Dated September 28, 2021)
Read GMP’s advisory letter.
- Biennial Net Meter Order 6.17.22 – effective September 1, 2022, Biennial Update of the Net-Metering Program. This references changes to Blended Rate, Siting Adjusters & REC Adjusters.
- State of Vermont Public Utility Commission Net Metering Website (formerly Vermont Public Service Board).
- Vermont SPEED Program
- Renewable Energy Vermont
- GMP’s Self Generation & Net Metering Tariff
- Complete listing of Distributed Generation Projects proposed to interconnect with the GMP system (updated daily).
State Governance
- 30 V.S.A. § 219a amended. Act 99 (Bill H.702) An act relating to self generation and net metering (April, 2014)
- 30 V.S.A. § 248 New gas and electric purchases, investments, and facilities; certificate of public good (May, 2013)
- Rule 5.100 Regulations Pertaining to Construction and Operation of Net Metering Systems
- Rule 5.500 Interconnection Procedures for Proposed Electric Generation Resources
- Net Metering Application Form Eligibility – You may apply for the following types of systems using this form:
- Ground-mounted photovoltaic systems with a capacity of greater than 15 kW and up to and including 50 kW; and
- Non-photovoltaic and non hydroelectric systems with a capacity of up to and including 50 kW.
- Net Metering Registration Form Eligibility – You may register the following types of systems using this form:
- Ground-mounted photovoltaic systems with a capacity of 15 kW or less,
- Roof-mounted photovoltaic systems with a capacity of 500 kW or less, and
- Hydroelectric facilities with a capacity of 500 kW or less.
- Rule 5.500 Standard Interconnection Application Form Eligibility – You may apply for the following types of systems using this form:
- Net metered, ground mounted photovoltaic systems with a capacity greater than 50kW,
- Net metered systems using technology other than photovoltaic that are not eligible to use the Net Metering Form or Net Metering Registration Form listed above.
- All other non-net metered systems
- VTPUC Application to Transfer Net-Metering CPG
- This form is to be used if you are transferring a net-metering Certificate of Public Good (CPG) because of a change in ownership of both the property hosting the net-metering system and the system itself.
- VTPUC Notice of Transfer
- This form is to be used if you are transferring a net-metering CPG or Net Metering Record (NMR) where the property hosting the net-metering system and the system itself are owned by the same.
- VTPUC Request Form to Attribute Multiple Net-Metering Systems to a Group
- This form is to be used to merge multiple groups into one if the combined capacity total is less than 500 kW.
- Group Billing Details for GMP
- This form is to be used when forming a group with GMP and should be sent separately from the CPG application. It does not need to be sent to the PSB.
Applications must be submitted to the PSB clerk as well as to GMP. Your GMP copy can be submitted by email to [email protected], or mailed to:
Green Mountain Power
2152 Post Road, Rutland, VT 05701
c/o Distributed Resources
Maps
GMP Requirements
- GMP Interconnection Guidelines
- GMP Solar Service Requirements
- GMP Solar Meter Socket Connections
- GMP Socket Labeling
- GMP Solar Service with Battery Storage (DC Tesla Powerwall or equivalent) Requirements
- Gross Solar Meter Battery Storage Install Form and Checklist – Requests can be emailed to [email protected]
Looking for a contractor or installer?
Check out Renewable Energy Vermont (REV) at REVermont.org or 802.229.0099. REV is a nonprofit, nonpartisan trade association representing nearly 300 businesses, individuals, colleges and others committed to reducing our reliance on fossil fuels and expanding the availability of renewable sources of power in Vermont.