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New Hampshire Application to Connect

In this section you will find information pertaining to the safe interconnection of generators to the Eversource power system.

Interconnection Application Options

Interconnections include photovoltaic arrays (solar panels), wind turbines, cogeneration units and micro turbines, to name a few. 

All regulations and fees have been filed and approved by the New Hampshire Public Utilities Commission (PUC).

CriteriaState GuidelineEmailApp. FormsApp. Fee
Simplified Process: inverter projects < 100 kVaGuideline (PDF)NHDG@eversource.comSimplified (PDF)
Exhibit B (PDF)
Standard Process: inverter projects > 100 kVa & all non-inverterGuideline (PDF)Eversource-NHDER@eversource.comPre-App (PDF)
Standard (PDF)


Implementation of the Revised IEEE Standard 1547

Effective June 1, 2018, all inverter-based solar PV project applications are subject to ISO-NE ride-through requirements. (Posted March, 2018)

To comply with these requirements, inverters shall be certified per the requirements of UL 1741 SA as a grid support utility interactive inverter, and shall have the voltage and frequency trip settings and ride-through capability described in the ISO-NE Inverter Source Requirement Document.  Additional details are provided in the attached presentation to the ISO-NE Planning Advisory Committee on February 14, 2018.

Application Descriptions

  • If you’re considering installing generation, you must adhere to specific procedural and technical guidelines that relate to the size and type of generation you are planning.
  • For inverted-based projects with an AC-capacity up to 100 kVa, customers will need to submit a Simplified Process Interconnection Application form (PDF). These applications will be processed in accordance with the New Hampshire Code of Administrative Rules and Eversource's Interconnection Standards for Inverters (PDF). Page 4 of the application outlines the supporting information that must also be included. Page 5 of the application is a "Supplemental Review Agreement" that must be submitted, along with a review fee, for any project with a maximum AC rating that exceeds 10 kilowatts. Check with your solar provider if you are unsure of the AC rating of your project.
  • For all other projects, please submit a Generator Interconnection Pre-Application Report Form (PDF) along with a $500 non-refundable fee. This allows our staff the opportunity to prepare an overview of the proposed project, the site, and nearby Eversource distribution circuits in order to facilitate the detailed interconnection study process described below.
  • In addition to the pre-application form, a completed Generator Interconnection Request application form (PDF) must be submitted. As noted on the form, the customer must provide evidence of control of the property on which the proposed facility shall be located and an electrical one-line diagram. These applications will be processed in accordance with Eversource's Guidelines for Generator Interconnection (PDF).
  • Eversource will review each application and contact the applicant regarding any engineering evaluations that must be performed in order to permit the interconnection. In some simple cases (e.g. most residential solar systems), no studies are required.
  • For other projects, one or more detailed engineering reviews will be required to evaluate the impact of the generation source on the Eversource distribution system and, possibly, the transmission system.

Additional Information

  • All projects will be required to comply with Eversource’s Technical Guidelines for Generator Interconnection (PDF). Developers should carefully review these guidelines prior to designing, purchasing or installing any generation equipment, transformers or associated switchgear.
  • Customers or developers that are in the early stages of considering a project and would like some basic information about the potential interconnection are encouraged to contact Eversource Distributed Generation (contact information below).
  • Customers that are planning to install a renewable generation source (e.g. solar) at their home or business may be eligible for net metering. Please refer to our net metering webpage for additional information. Applications and documentation should be mailed to the contact information below.

Net Metering

If you are installing distributed generation (e.g., solar panels), or already have a generator, you may be eligible for net metering, a method of measuring the energy consumed and produced by a customer’s generating facility. If you are a customer applying for electrical interconnection, your application to connect is all you need to apply for net metering.

Submit Application

Applications, fees and documentation can be mailed to:

Eversource Energy
Attention: Eversource NH DG
P.O. Box 330
Manchester, NH 03101-0330

Applications and documentation can be emailed to: