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New Hampshire Application to Connect

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

Interconnection Application

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

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


You will use our PowerClerk portal to submit and track your application. This online tool brings you:

  • The ability to easily upload and review documents associated with your projects
  • Automatic communications to help you keep track of your projects
  • A mobile-friendly user interface that can be used on most devices including your laptop or tablet

You will need an user ID to use PowerClerk. If you don't have an ID, you'll be prompted to sign up.

If you already have a DG contractor account to use PowerClerk in Connecticut or Massachusetts, you can access NH PowerClerk with the same login – no need to create another user ID.

Learn how to access and use PowerClerk in our YouTube video.

Log into PowerClerk

Application Descriptions and Guidelines

Specific procedural and technical guidelines related to the size and type of generation must be adhered to when installing a generation project. 

Simplified projects

Inverted-based projects with an AC capacity up to 100 kilowatts.

Standard projects

All non-inverter and AC projects above 100 kilowatts capacity.

  • These applications will be processed in accordance with Eversource's Guidelines for Generator Interconnection (PDF).
  • A pre-application must be submitted through PowerClerk, along with a $500 non-refundable fee. This allows us the opportunity to prepare an overview of the proposed project, site, and nearby Eversource distribution circuits to facilitate the detailed interconnection study process.
  • Generator Interconnection Request application form (PDF) must be submitted through PowerClerk. The customer must provide evidence of control of the property on which the proposed facility shall be located and an electrical one-line diagram.

Other application information

  • We will review each application and contact the applicant regarding any engineering evaluations that must be performed in order to permit the interconnection.
  • One or more detailed engineering reviews may be required to evaluate the impact of the proposed generation source on the Eversource distribution system and, possibly, the transmission system.

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 presentation to the ISO-NE Planning Advisory Committee from February 14, 2018.

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 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.

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. We automatically check for net metering eligibility when an application for interconnection is submitted in PowerClerk.