Central Maine Power (CMP) Data Access Guide
Central Maine Power (CMP), an Avangrid company, is Maine's largest electric transmission-and-distribution utility. With 622,000+ AMI smart meters deployed, CMP offers Green Button (Download My Data) CSV/XML exports, an Energy Manager portal, Interval Usage Web for C&I, EDI 867 for licensed suppliers, and the Electricity Supplier Marketplace for third-party data access.
How to Get Your Central Maine Power (CMP) Data: All Access Methods
| Method | 1st Party | 3rd Party | Customer Types | Data Types | Latency | Format |
|---|---|---|---|---|---|---|
| My Account / eBill | ✓ | — | All | Bills, monthly usage | Per billing cycle | PDF, CSV |
| Download My Data (Green Button) | ✓ | — | AMI customers | Hourly kWh | Daily | CSV, XML |
| Interval Usage Web | ✓ | ✓ | C&I (and CEPs with contract) | Hourly kWh, kW demand | Daily | CSV, Web |
| Electricity Supplier Marketplace | — | ✓ | Licensed suppliers (customer opt-in) | Hourly usage, demand | Near real-time/daily | Portal, CSV |
| EDI 867 | — | ✓ | Licensed CEPs | Historical usage | ~24-48h batch | ANSI X12 |
Billing Data Access
CMP provides billing data through its My Account / portal.cmpco.com with up to 36 months of history. Bills download as PDF and CSV. Third parties (competitive suppliers, aggregators, consultants) can request billing and usage records under Maine PUC Chapter 322 with customer authorization, governed by tariff Section 18.13.
What Data Is on Your Central Maine Power (CMP) Bill
- Current and historical bills (36 months)
- Payment history and dates
- Account number and rate code
- kWh usage per billing period
- kW demand (where available)
- On-peak, off-peak, interim usage (where applicable)
How to Download Central Maine Power (CMP) Bills (Business & Commercial)
- 01Register or sign in at portal.cmpco.com
- 02Open Billing History (up to 36 months)
- 03Download bills (PDF/CSV)
- 04For C&I usage records, contact Business Services at 1-800-565-3181
How to Download Central Maine Power (CMP) Bills (Residential)
- 01Go to https://www.cmpco.com/account and click Sign in/Register
- 02Register with account number, service address, and email
- 03Open the Account/Billing section and select View Bills
- 04Download as PDF or CSV; enroll in eBill for notifications
Third-Party Access to Central Maine Power (CMP) Billing Data
Customer authorization data request
- 01Obtain written/electronic customer authorization (MPUC Chapter 322)
- 02Submit request with CMP account numbers and date range
- 03First 13 billing periods free; extended history per Section 18.13 fees
- 04Receive spreadsheet (Excel/CSV), typically 1-2 business days
Broker/Aggregator Authorization Agreement
- 01Customer completes the disclosure agreement naming the aggregator
- 02Mail or email signed agreement to CMP
- 03Enables ongoing requests without re-authorization per request
Want to understand the charges on your bill?
See the Central Maine Power (CMP) Rate Schedules & Tariff Guide →Interval Data & Smart Meters
CMP deployed 622,000+ AMI smart meters territory-wide, delivering hourly interval data. First-party access is via Green Button Download My Data (CSV/XML) and the Energy Manager portal; C&I customers can request Interval Usage Web access. Third parties use the Electricity Supplier Marketplace, EDI 867, or authorized data requests.
How to Download Central Maine Power (CMP) Interval Data via Green Button
- 01Ensure Energy Manager enrollment at the smart energy portal
- 02Open Download My Data at https://www.cmpco.com/smartenergy/understandyourusage/downloadusagedata
- 03Select a date range (up to 13 months)
- 04Choose CSV or NIST Green Button v2.1 XML and download
Interval data is essential for rate comparison and TOU analysis.
See which Central Maine Power (CMP) rate schedule is best for your usage pattern →Third-Party API Access
CMP has no public REST API or Green Button Connect My Data. Programmatic-style access for licensed suppliers runs through the Electricity Supplier Marketplace (customer opt-in to share hourly usage) and EDI 867. Consultants and aggregators use authorized data requests or the Broker/Aggregator Authorization Agreement.
How to Register as a Central Maine Power (CMP) API Vendor
- 01Be a Maine-licensed competitive electricity supplier
- 02Enroll in ESM and accept terms
- 03Customer opts in to share data
- 04Access hourly usage in the ESM portal
EDI (Electronic Data Interchange)
Supported Central Maine Power (CMP) EDI Transaction Sets
| Code | Name | Purpose |
|---|---|---|
| 867 | Historical Usage | Request and delivery of hourly/daily historical customer usage data. |
| 814 | Change of Service / Billing | Billing address and service changes / enrollment. |
| 810 | Invoice | Billing documents for supplier settlements. |
| 820 | Remittance Advice | Payment order / remittance information. |
How to Enroll in Central Maine Power (CMP) EDI
- 01Become a licensed Competitive Electricity Provider and execute a CMP service agreement
- 02Configure a VAN connection and trading partner profile
- 03Download the Maine EBT/EDI standards and map transaction sets
- 04Test with a 997 functional acknowledgment, then request usage via 867
Rate Schedules & Tariff Analysis
CMP bills are split between MPUC-regulated delivery and competitive supply. Delivery is segmented by demand class (SGS/MGS/LGS), with demand charges appearing at 20 kW and growing for >400 kW accounts. Supply is either Standard Offer (verified 2026 Medium-class monthly prices range roughly $0.088-$0.195/kWh) or a competitive provider, giving C&I customers a real lever to shop supply.
Central Maine Power (CMP) Rate Schedule List
| Schedule | Applicability |
|---|---|
| Small General Service (SGS) | Demand < 20 kW |
| Medium General Service (MGS) | Demand 20-400 kW |
| Large / Primary General Service (LGS) | Demand > 400 kW |
Central Maine Power (CMP) Rate Features & TOU Details
- Delivery and supply are separately priced (deregulated supply)
- Demand classes: SGS <20 kW, MGS 20-400 kW, LGS >400 kW
- Standard Offer supply set by MPUC competitive bid; large class indexed monthly
- Verified 2026 Medium-class standard offer ranges ~$0.088-$0.195/kWh by month
- Residential Rate A delivery $0.136474/kWh eff. 2026-01-01 (context)
For a deeper analysis including cost optimization strategies and historical rate trends:
Read the full Central Maine Power (CMP) Rate Optimization Guide →Other Data Access Programs
Electricity Supplier Marketplace (ESM)
Platform where Maine-licensed competitive suppliers view hourly usage of customers who opt in, to develop targeted pricing and programs. No per-request fees and no authorization forms (customer self-opts in).
- 01Supplier obtains MPUC license and enrolls in ESM
- 02Customer opts in to share usage with selected supplier(s)
- 03Supplier accesses hourly usage and authorized contact info in the ESM portal
Net Energy Billing (NEB)
Maine's net energy billing program lets customers with qualifying generation (e.g., solar) offset usage with bill credits, administered under MPUC rules.
- 01Install qualifying generation and interconnect with CMP
- 02Enroll in Net Energy Billing
- 03Receive kWh credits applied to delivery and supply charges
Limitations & Considerations
- ⚠No Green Button Connect My Data (OAuth)
- ⚠No public REST API for direct programmatic access
- ⚠No real-time or sub-hourly interval data
- ⚠Aggregators must request data per account (no bulk enrollment API)
- ⚠EDI uses a single daily inbound cycle with ~24-48h turnaround
- ⚠Interval Usage Web is portal-based without an automated feed
Central Maine Power (CMP) Data Access FAQ
How can a C&I customer get hourly interval data from CMP?▾
Large commercial and industrial accounts can request Interval Usage Web access from Business Services (1-800-565-3181), which provides hourly kWh and peak kW with CSV export. Any AMI customer can also use Green Button Download My Data for up to 13 months of hourly CSV/XML.
Can a competitive supplier or aggregator pull our usage automatically?▾
Maine-licensed suppliers can use the Electricity Supplier Marketplace (customer opt-in) for hourly data, or EDI 867 with a CMP trading-partner agreement. Consultants/aggregators use authorized data requests or a Broker/Aggregator Authorization Agreement. There is no OAuth Connect My Data or REST API.
Does CMP set our electricity supply price?▾
No. CMP is a delivery-only utility. Supply comes from the MPUC-set Standard Offer (by customer class) or a Competitive Electricity Provider you choose. CMP bills delivery and, for Standard Offer customers, the supply charge on the suppliers' behalf.
Which rate class applies to our facility?▾
CMP segments non-residential delivery by demand: Small General Service (<20 kW, no demand charge), Medium General Service (20-400 kW), and Large/Primary General Service (>400 kW). Larger classes carry demand charges and are eligible for Interval Usage Web.
Are there fees for historical usage data?▾
The first 13 billing periods are free. Extended history carries fees governed by tariff Section 18.13; suppliers also reference Section 43 (fees for services to electricity providers).
The Best Way to Access Data from Central Maine Power (CMP)
Nectar connects to Central Maine Power (CMP) and 7,000+ utility providers — billing, interval, and rate data delivered automatically. No portals, no forms, no manual downloads.
Nectar for Energy & Sustainability Teams
Managing utility data for commercial or industrial buildings? Nectar offers a free energy data audit — we'll review your current setup and show you where automation can save your team hours every month.
Get a Free AuditNectar for Developers & Consultants
Building energy tools or advising clients on utility data? Nectar works with technology partners and consultants who need reliable data infrastructure.
Partner with Us