Unitil Energy Systems (New Hampshire) Data Access Guide
Unitil Energy Systems is a regulated electric distribution IOU serving about 81,000 customers in New Hampshire. It offers strong programmatic data access (MyUnitil CSV downloads, Green Button Download My Data, and mature EDI for competitive suppliers) in a deregulated supply market with full retail energy choice. Green Button Connect My Data is in testing.
How to Get Your Unitil Energy Systems (New Hampshire) Data: All Access Methods
| Method | 1st Party | 3rd Party | Customer Types | Data Types | Latency | Format |
|---|---|---|---|---|---|---|
| MyUnitil Portal (CSV) | ✓ | ✓ | Residential, Commercial, Industrial | Billing, payment, usage | Monthly / daily | CSV |
| Green Button Download My Data | ✓ | ✓ | All electric | Usage, billing | Daily-monthly | ESPI XML |
| EDI (competitive suppliers) | — | ✓ | Commercial, Industrial (via supplier) | Billing, usage, account | Monthly / interval | ANSI X12 V4010 |
| Guest Portal Access | — | ✓ | All (authorized consultants) | Billing, usage | Monthly / daily | CSV / portal |
| Green Button Connect My Data | — | ✓ | All (testing) | Usage, billing | Near-real-time (planned) | ESPI XML / OAuth |
Billing Data Access
Unitil customers access billing and payment history through the MyUnitil portal, which supports bulk CSV downloads of billed usage, payment history, and billing history for up to 24 months. A multi-account download lets facility managers pull data for many properties into a single CSV.
What Data Is on Your Unitil Energy Systems (New Hampshire) Bill
- Current and historical billing statements (PDF)
- Payment history (up to 24 months)
- Billed usage (kWh, kW demand where applicable)
- Monthly consumption with graphical displays
- Multi-account consolidated downloads
How to Download Unitil Energy Systems (New Hampshire) Bills (Business & Commercial)
- 01Log in to MyUnitil with your profile linked to all sites
- 02Open Bills & Payments, Payment History, or Billed Usage
- 03Click Download at the bottom of the page
- 04Select multiple accounts, data type(s), and date range (up to 24 months)
- 05Download a single consolidated CSV across all linked accounts
- 06For supplier-level integration, contact EL_SupplierServices@unitil.com about EDI
How to Download Unitil Energy Systems (New Hampshire) Bills (Residential)
- 01Visit https://myaccount.unitil.com/ and click Sign Up Now
- 02Enter account number, service address, and personal info from a recent bill
- 03Create a username/password and complete email verification
- 04Open Bills & Payments to view statements (PDF)
- 05Scroll to the Download button, pick data type and date range (up to 24 months)
- 06Download the generated CSV
Third-Party Access to Unitil Energy Systems (New Hampshire) Billing Data
MyUnitil Guest Access
- 01Customer calls 1-888-301-7700 to request MyUnitil Guest Access for a named third party
- 02Provide service address, account number, and the third party's name and email
- 03Set scope (read-only) and a recommended expiration date
- 04Unitil verifies and provisions access in 1-2 business days
- 05Third party logs in at https://myaccount.unitil.com/ to view and download billing/usage data
Authorized Third-Party Designation
- 01Customer calls 1-888-301-7700 to add an authorized third party
- 02Provide the third party's contact details (and Tax ID/SSN for non-customers)
- 03Designation takes effect by the next billing cycle (~30 days)
- 04Third party can receive bill copies and request data downloads by email
Nectar API
- 01Register with Nectar (docs.nectarclimate.com)
- 02Provide your Unitil account number to Nectar
- 03Authorize via MyUnitil guest access or Green Button download today
- 04Migrate to Green Button Connect My Data (OAuth) once it launches
Want to understand the charges on your bill?
See the Unitil Energy Systems (New Hampshire) Rate Schedules & Tariff Guide →Interval Data & Smart Meters
Unitil is deploying AMI smart meters (NH rollout begins late 2026 through 2027). Today, smart-meter customers can view daily usage in MyUnitil (90 days of viewing, 24 months for download) with temperature overlays. Hourly/15-minute interval data and a new hourly load-settlement platform are committed under rate case DE 25-025 for 2025-2026.
How to Download Unitil Energy Systems (New Hampshire) Interval Data via Green Button
- 01Log in to MyUnitil at https://myaccount.unitil.com/
- 02Find the Green Button / Download My Data feature in the energy data section
- 03Authorize the read-only download of your own data
- 04Select usage and/or billing data and a date range (up to 24 months)
- 05Download in ESPI XML (or PDF) and import into compatible tools
Interval data is essential for rate comparison and TOU analysis.
See which Unitil Energy Systems (New Hampshire) rate schedule is best for your usage pattern →Third-Party API Access
Unitil's programmatic third-party access today runs through EDI (for competitive suppliers) and Green Button Download My Data. A standards-based ESPI API via Green Button Connect My Data is in vendor testing (NAESB REQ.21, OAuth 2.0), targeted for 2025-2026, which will allow automated, customer-authorized data sharing without manual downloads.
Available Unitil Energy Systems (New Hampshire) API Endpoints
| Function | Endpoint | Method | Format |
|---|---|---|---|
| Retrieve usage (ESPI) | /espi/1_1/resource/Subscription/{id}/UsagePoint (planned) | GET | ESPI XML |
How to Register as a Unitil Energy Systems (New Hampshire) API Vendor
- 01Contact EL_SupplierServices@unitil.com to register an application and request a data-sharing agreement
- 02Implement OAuth 2.0 authorization-code flow against Unitil's authorization server
- 03Integrate the ESPI API for usage, billing, meter, and account data
- 04Test against Unitil's sandbox with test accounts and pass security review
- 05Go live and register in Unitil's authorized app directory
EDI (Electronic Data Interchange)
Unitil supports a mature EDI program for competitive suppliers, aggregators, and ESCOs using ANSI X12 V4010, with formal Trading Partner Agreements, testing/certification, and VertexOne VXexchange as the primary connectivity platform. EDI is the main programmatic channel for third-party access to customer usage and account data.
Supported Unitil Energy Systems (New Hampshire) EDI Transaction Sets
| Code | Name | Purpose |
|---|---|---|
| 810 | Invoice | Supplier-to-utility billing/invoicing for supplier services |
| 814 | Enrollment / Change / Drop / Historical Usage Request | Account enrollment, changes, de-enrollment, and usage-history requests |
| 820 | Payment Order / Remittance | Payment notification and remittance advice |
| 867 | Product Transfer / Usage | Historical and monthly metered usage data from utility to supplier |
| 997 | Functional Acknowledgement | Confirmation of transaction receipt (both directions) |
How to Enroll in Unitil Energy Systems (New Hampshire) EDI
- 01Contact Electric Supplier Services at EL_SupplierServices@unitil.com or 1-603-772-0775
- 02Request and sign the Competitive Electric Supplier Trading Partner Agreement (TPA)
- 03Obtain the EDI Implementation Guide, load profiles, tariffs, and test accounts
- 04Set up connectivity via VertexOne VXexchange (or VAN/direct)
- 05Complete phased EDI testing (997, 814, 810, 820, 867) and certification
- 06Go live on the EDI Operating Schedule for production transactions
Rate Schedules & Tariff Analysis
Unitil NH C&I bills split into regulated delivery charges (set by the NH PUC) and supply. Rate G-2 serves small/medium loads with a $14.86/kW demand charge; Rate G-1 serves large loads at primary or secondary voltage with a $10.29/kVA demand charge and high customer charge. Supply can come from competitive suppliers, Community Power, or Unitil Default Energy Service (Fixed or monthly Variable Energy Service Charge). TOU-EV options exist for both classes.
Unitil Energy Systems (New Hampshire) Rate Schedule List
| Schedule | Applicability |
|---|---|
| Rate G-2 General Service | Small/medium C&I |
| Rate G-1 Large General Service | Large C&I, primary/secondary voltage |
| TOU-EV G-1 / G-2 | Optional EV charging TOU |
Unitil Energy Systems (New Hampshire) Rate Features & TOU Details
- Delivery (regulated) and supply (competitive/default) are billed separately
- Rate G-2 for <200 kVA / <100,000 kWh/mo; Rate G-1 for larger loads
- Demand charges: $14.86/kW (G-2), $10.29/kVA (G-1)
- Default Energy Service has Fixed (semi-annual) and Variable (monthly) supply charges
- Optional TOU-EV rates with steep on-peak pricing (3-8 PM weekdays)
For a deeper analysis including cost optimization strategies and historical rate trends:
Read the full Unitil Energy Systems (New Hampshire) Rate Optimization Guide →Other Data Access Programs
Green Button Connect My Data (Testing)
An ESPI-based, OAuth 2.0 API for automated, customer-authorized third-party data sharing, in vendor testing with CPCNH and others; expected 2025-2026.
- 01Application developers contact EL_SupplierServices@unitil.com to register and negotiate terms
- 02Implement OAuth 2.0 and the ESPI API
- 03Test in Unitil's sandbox and pass security review
- 04Customers authorize via MyUnitil and can revoke at any time
DE 25-025 Rate Case Data Commitments
Unitil's NH electric distribution rate case settlement commits to hourly interval data for settlement, time-of-use data for suppliers, Green Button CMD, and solar/storage export accounting.
- 01Track docket DE 25-025 at the NH PUC
- 02Watch for hourly load-settlement platform rollout (2025-2026)
- 03Plan for TOU usage data availability to competitive suppliers
Limitations & Considerations
- ⚠Hourly/15-minute interval data not yet generally available (NH AMI rollout 2026-2027)
- ⚠Green Button Connect My Data still in testing; no production OAuth API yet
- ⚠Mobile app cannot download data - downloads require the web portal
- ⚠Most gas metering is AMR (monthly), not interval
- ⚠Formal aggregator program not yet published; relies on guest access or Green Button today
Unitil Energy Systems (New Hampshire) Data Access FAQ
Can I download my Unitil usage data in bulk for energy analysis?▾
Yes. MyUnitil supports CSV downloads of billed usage, payment history, and billing history for up to 24 months, including a multi-account download that consolidates many sites into one file. Green Button Download My Data also exports standardized ESPI XML for electric customers.
How does a competitive supplier or aggregator get programmatic access to Unitil data?▾
Through Unitil's EDI program (ANSI X12 V4010 via VertexOne VXexchange). Suppliers sign a Trading Partner Agreement, complete testing/certification, and then exchange 814 (enrollment/usage requests), 867 (usage), 810 (invoices), and 820 (payments). Contact EL_SupplierServices@unitil.com to start.
Is interval (hourly/15-minute) data available to C&I customers?▾
Daily usage is available today for smart-meter customers. Hourly and 15-minute interval data, plus a new hourly load-settlement platform, are committed under rate case DE 25-025 and expected with the NH AMI rollout in 2026-2027.
Which delivery rate applies to my business?▾
Rate G-2 is the standard for small/medium customers below 200 kVA demand and under 100,000 kWh/month (demand charge $14.86/kW). Rate G-1 is the large general service rate for customers at or above 200 kVA and/or over 100,000 kWh/month (demand $10.29/kVA), available at primary or secondary voltage.
Can I choose my electricity supplier on Unitil?▾
Yes. New Hampshire is deregulated, so you can buy energy supply from a competitive supplier or a Community Power (CPCNH) program while Unitil continues to deliver the power. If you do nothing, you stay on Unitil's Default Energy Service Charge, which has a fixed semi-annual and a monthly variable component.
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