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New HampshireNew Hampshire interconnection applications
9 electric utilities serve New Hampshire (EIA-861, 2025): 3 investor-owned utilitys, 1 electric cooperative, 5 municipal utilitys. Together they serve 647,539 residential customers; 25,210 residential customers were on net metering at year-end 2025.
Largest utilities in New Hampshire
Investor-owned utility · 464,024 residential customers · New Hampshire
Applications: PowerClerk – Eversource NH PowerClerk
Interconnection process and documents →Electric cooperative · 74,619 residential customers · New Hampshire
Applications: Own online portal – NHEC Solar & Battery Interconnection Application (online form via NHEC SmartHub/FormAssembly)
Interconnection process and documents →Investor-owned utility · 69,081 residential customers · New Hampshire
Applications: PowerClerk – Unitil Interconnection Program Portal (PowerClerk, announced Feb 2025; 'Company online application system')
Interconnection process and documents →Investor-owned utility · 39,815 residential customers · New Hampshire
Applications: PDF + email – Application package by email
Interconnection process and documents →Municipal utility · 6,031 customers · New Hampshire
Interconnection process and documents →Municipal utility · 4,064 customers · New Hampshire
Interconnection process and documents →Municipal utility · 1,705 customers · New Hampshire
Interconnection process and documents →Municipal utility · 1,151 customers · New Hampshire
Interconnection process and documents →Municipal utility · 82 customers · New Hampshire
Interconnection process and documents →Export compensation among the researched New Hampshire utilities: Net billing. Rules differ by utility – see each utility page.
New Hampshire interconnection rule
En 1000 text (adopted July 2026 per brief) could not be read: gc.nh.gov unreachable from all tools, no archive.org copy, DOE rules page still lists only En 900. Levels, timelines, fees, insurance, disconnect and documents left empty - fill from En 1000 text.
New Hampshire Public Utilities Commission / NH Department of Energy (rules En 900, En 1000)
Interconnection ruleN.H. Code Admin. R. En 1000 (interconnection, rulemaking RUL 2024-007); net metering En 900 (formerly Puc 900) – En 1000 Interconnection rules · source
Applies toRate-regulated distribution utilities: Eversource (PSNH), Liberty Utilities, Unitil, and NH Electric Cooperative; municipal utilities not covered
Export compensationNEM – RSA 362-A:9; En 900; Net Metering Tariff 2023 (NEM 2023)
Residential/small commercial up to 100 kW AC behind the meter; larger facilities up to 1,000 kW (political subdivisions 5,000 kW). Statutory per-utility aggregate limit. Compensation per 2023 net metering tariff (DOE overview PDF).
Customers of municipal electric utilities must ask their utility whether net metering is available (NH DOE page).
- NH DOE - Net Metering: https://www.energy.nh.gov/renewable-energy/net-metering-and-group-net-metering/net-metering (retrieved 2026-11-13)
- NH DOE - Administrative Rules (En 900 listed; En 1000 not yet listed): https://www.energy.nh.gov/rules-and-regulatory/administrative-rules (retrieved 2026-11-13)
- RUL 2024-007 En 1000 Interconnection Working Group session (May 2025): https://www.energy.nh.gov/event/rul-2024-007-en-1000-interconnection-specific-working-group-technical-session-5 (retrieved 2026-11-13)
- Net Metering Tariff 2023 Overview (NH DOE): https://www.energy.nh.gov/sites/g/files/ehbemt551/files/inline-documents/sonh/net-metering-tariff-2023-overview.pdf (retrieved 2026-11-13)
All 9 utilities in New Hampshire
- Eversource Energy (New Hampshire)464,024
- NHEC (New Hampshire Electric Co-op)74,619
- Unitil (New Hampshire)69,081
- Liberty (New Hampshire Electric)39,815
- Town of Wolfeboro0
- Town of Littleton0
- Town of Ashland0
- Precinct of Woodsville0
- New Hampton Village Precinct0
Residential customers in New Hampshire per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$500 / month
Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.
- Unlimited interconnection applications
- Single-line diagram and site plan for every application
- Pre-submission check against the utility’s requirements
- Homeowner e-signature link for the authorization
- Filing in your utility portal accounts or by the utility’s method
- Utility questions, corrections and resubmissions
- Follow-up through approval, inspection and PTO
- Customer list, exports, API and webhooks
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.