Delmarva Power Data Access Guide
Delmarva Power & Light is an Exelon investor-owned utility delivering electricity and natural gas across Delaware and the Maryland Eastern Shore, serving roughly 555,000 electric customers. Both Delaware and Maryland have deregulated electric supply, so customers can take default Standard Offer Service or shop a competitive supplier while Delmarva provides regulated delivery.
How to Get Your Delmarva Power Data: All Access Methods
| Method | 1st Party | 3rd Party | Customer Types | Data Types | Latency | Format |
|---|---|---|---|---|---|---|
| Online Portal (MyAccount) | ✓ | ✓ | Residential, C&I | Billing, usage | Real-time | PDF, HTML |
| Green Button Download | ✓ | ✓ | Residential, C&I | Hourly interval | Next-day | XML (ESPI) |
| Exelon EUDS | ✓ | ✓ | C&I, building owners | Monthly usage | Monthly | CSV/Excel |
| Opower API | ✓ | ✓ | Residential / IoT | Hourly usage | Near real-time | JSON |
| EDI | — | ✓ | Suppliers | Enrollment, usage | Monthly/on request | X12 |
Billing Data Access
Delmarva Power provides billing access through its secure MyAccount portal and mobile app. C&I customers can view and download bills, authorize contractors, and aggregate building data via Exelon's Energy Usage Data System (EUDS). An Agency Access Portal supports property managers and institutional accounts.
What Data Is on Your Delmarva Power Bill
- Billing statements and charge breakdowns
- Payment history
- Usage in kWh and gas therms
- Budget billing details
- Line-item charges and riders
- Payment status
How to Download Delmarva Power Bills (Business & Commercial)
- 01Log in to https://secure.delmarva.com/ with business credentials
- 02For multi-building portfolios, enroll in Exelon EUDS at https://www.exelonenergyusagedata.com/
- 03Email support@exelonenergyusagedata.com to have buildings provisioned, then invite consultants as users
- 04Export usage to CSV/Excel or connect to ENERGY STAR Portfolio Manager
How to Download Delmarva Power Bills (Residential)
- 01Visit https://secure.delmarva.com/ and create an online account
- 02Log in and open My Account > My Bill Details
- 03Select View My Bill to view the current statement
- 04Download bills as PDF and browse multi-month Account History
Third-Party Access to Delmarva Power Billing Data
Contractor Data Access Authorization
- 01Customer signs the Update Contractor Data Access Authorization form (account number, signature, contractor, scope, term)
- 02Customer submits via the portal or mails to Delmarva; processing takes 5-10 business days
- 03Contractor logs in to the contractor portal and enters the customer account number
- 04Contractor views authorized billing and usage data
Exelon Energy Usage Data System (EUDS)
- 01Building owner creates an account at exelonenergyusagedata.com and submits building addresses/account numbers
- 02EUDS Program Administrator provisions the buildings
- 03Owner adds consultants as users with view/download permissions per building
- 04Authorized users export usage data and optionally sync to ENERGY STAR Portfolio Manager
Want to understand the charges on your bill?
See the Delmarva Power Rate Schedules & Tariff Guide →Interval Data & Smart Meters
Delmarva's AMI smart meters record interval usage and make it available at hourly granularity. Customers download Green Button XML files or view trends in the My Usage portal; smart-home/IoT integrations can pull reads via the Opower API.
How to Download Delmarva Power Interval Data via Green Button
- 01Log in to https://secure.delmarva.com/
- 02Open My Account > My Bill Usage > My Green Button Data
- 03Select your date range (typically 12-24+ months of hourly data)
- 04Download the standardized XML file
- 05Import into ENERGY STAR Portfolio Manager, EnergyCAP, or another Green Button application
Interval data is essential for rate comparison and TOU analysis.
See which Delmarva Power rate schedule is best for your usage pattern →Third-Party API Access
Delmarva does not publish a general developer API, but the Opower (Oracle) REST API exposes account discovery and interval-read endpoints used by smart-home platforms like Home Assistant. For C&I building portfolios, Exelon EUDS provides authorized aggregated usage with CSV export and Portfolio Manager sync.
Available Delmarva Power API Endpoints
| Function | Endpoint | Method | Format |
|---|---|---|---|
| Account discovery | https://dpld.opower.com/ei/edge/apis/multi-account-v1/cws/dpld/customers | GET | JSON |
| Interval reads | https://dpld.opower.com/ei/edge/apis/DataBrowser-v1/cws/utilities/dpld/utilityAccounts/{uuid}/reads | GET | JSON |
How to Register as a Delmarva Power API Vendor
- 01Confirm the platform supports Opower and select Delmarva Power
- 02Authorize with Delmarva MyAccount/Opower credentials via the secure OAuth flow
- 03Query account-discovery and interval-read endpoints with the access token
- 04For portfolios, use EUDS building invitations and export/sync data
EDI (Electronic Data Interchange)
Delmarva, operating in Delaware and Maryland, participates in multi-state EDI coordination for electric trading partners using ANSI X12 transactions. EDI is the required method for licensed suppliers/ESCOs to enroll customers and exchange usage data; the regional implementation guides are shared with the NJ/PA/DE/MD framework.
Supported Delmarva Power EDI Transaction Sets
| Code | Name | Purpose |
|---|---|---|
| 814 | Service Order (Enroll/Change/Drop) | Customer enrollment, change, and drop requests between supplier and Delmarva |
| 867 | Monthly Usage | Monthly meter usage and consumption reporting |
| 867HI | Historical Interval Usage | Up to 24 months of historical interval (15-min/hourly) readings |
| 997 | Functional Acknowledgment | Acknowledges receipt of EDI transactions |
How to Enroll in Delmarva Power EDI
- 01Confirm you are a licensed retail supplier in Delaware or Maryland
- 02Contact Delmarva EDI coordination for trading-partner materials and complete the Trading Partner Agreement
- 03Complete certification testing (814/867) in the test environment
- 04Receive production credentials and begin transacting with 997 acknowledgments
Rate Schedules & Tariff Analysis
Delmarva C&I rates separate regulated delivery (set by the Delaware/Maryland PSC) from competitive generation supply. Schedule selection follows size and voltage: small non-demand (SGS-ND), medium demand (MGS-S), large (LGS-S), and primary voltage (GS-P), with a proposed 25 MW+ Large Load tariff. SOS supply rates jumped ~18-20% on June 1, 2026, sharpening the case for shopping competitive supply and managing demand.
Delmarva Power Rate Schedule List
| Schedule | Applicability |
|---|---|
| SGS-ND / MGS-S | Small to medium commercial general service. |
| LGS-S / GS-P | Large commercial/industrial, secondary and primary voltage. |
| Large Load Tariff (proposed) | Customers with 25 MW+ monthly maximum demand (DPSC Docket 25-0826). |
Delmarva Power Rate Features & TOU Details
- Delivery vs. supply are unbundled
- SOS default supply resets each June 1 (Delaware)
- Demand (kW) charges material on MGS-S/LGS-S/GS-P
- Primary-voltage discount on GS-P
- Proposed 25 MW+ Large Load tariff under DPSC review
- Competitive supplier shopping available in DE and MD
For a deeper analysis including cost optimization strategies and historical rate trends:
Read the full Delmarva Power Rate Optimization Guide →Other Data Access Programs
Energy Savings for Business - Service Provider Program
Approved contractors, ESCOs, and engineering firms can access authorized customer data to deliver energy-efficiency projects and submit incentive applications.
- 01Apply to become an approved service provider
- 02Complete the application (license, insurance, specialties); Delmarva reviews in ~2-4 weeks
- 03Receive contractor portal credentials
- 04Access authorized customer usage for project baselines and submit applications
HUD Multifamily Utility Data / Benchmarking
Multifamily property owners can request aggregate utility data for benchmarking and utility-allowance calculations, with tenant consent.
- 01Collect tenant authorizations (aggregate allowed for 5+ unit buildings)
- 02Submit unit/account list to Delmarva
- 03Receive 12 months of bill amounts per unit (2-4 week processing)
- 04Input into ENERGY STAR Portfolio Manager for benchmarking
Limitations & Considerations
- ⚠No public general-purpose developer API; programmatic access is via the Opower API, EUDS, or Green Button XML.
- ⚠Utility-hosted Green Button Connect My Data (GBCMD) is not confirmed; OAuth access is via Opower platforms.
- ⚠EDI access is limited to licensed retail suppliers/aggregators.
- ⚠Gas interval data is limited; gas usage is reported monthly.
- ⚠Maryland allows AMI opt-out (Delaware does not), which can limit interval data for opted-out meters.
Delmarva Power Data Access FAQ
Is electricity supply deregulated for Delmarva business customers?▾
Yes. Delmarva delivers electricity (and gas) as the regulated utility, but electric generation supply is competitive in both Delaware and Maryland. C&I customers can take default Standard Offer Service or buy from a licensed competitive supplier. Compare options via the Delaware PSC Customer Electric Choice page.
How much did Delmarva supply rates increase in 2026?▾
Per Delaware PSC Docket 26-0389, Standard Offer Service supply prices rose about 18-20% effective June 1, 2026 (residential summer from $0.093569 to $0.111063/kWh; small commercial summer from $0.093404 to $0.110159/kWh). A typical residential customer (~811 kWh/month) sees roughly +$14.64/month, about 9% overall. A separate $67.8M Delaware base-rate increase was filed in January 2026.
How does my business get interval (hourly) usage data?▾
Delmarva AMI meters record hourly interval data. Businesses can download Green Button XML from MyAccount, pull reads via the Opower API for smart-home/IoT platforms, or aggregate multiple sites through Exelon EUDS with CSV/Excel export and ENERGY STAR Portfolio Manager sync.
Can a consultant or energy manager access our Delmarva data?▾
Yes. Customers can sign the Update Contractor Data Access Authorization form, invite a consultant as a user in EUDS, or share Green Button XML. Approved service providers in the Energy Savings for Business program can access authorized data, and licensed suppliers exchange usage via EDI 867/867HI transactions.
Does Delmarva offer a developer API?▾
Delmarva does not publish a general developer API. Programmatic access is available through the Opower REST API (OAuth 2.0) used by platforms like Home Assistant, the Exelon EUDS for C&I portfolios, and Green Button XML downloads.
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