City of Naperville Electric Utility Data Access Guide
The City of Naperville Electric Utility (DPU-E) is a municipally owned electric utility serving about 63,700 customers in Naperville, IL. It offers first-party billing via eBill and 15-minute interval usage data through its in-house Empower portal, but has no Green Button, EDI, or public API; third-party access is manual under Illinois law 220 ILCS 5/16-122.
How to Get Your City of Naperville Electric Utility Data: All Access Methods
| Method | 1st Party | 3rd Party | Customer Types | Data Types | Latency | Format |
|---|---|---|---|---|---|---|
| eBill Portal | ✓ | — | Residential, Commercial | Billing | Real-time at issuance | PDF, web |
| Empower Portal | ✓ | — | Residential, Commercial | 15-minute interval usage | 24-hour delay | CSV/Excel, web charts |
| Manual Authorized Request (220 ILCS 5/16-122) | — | ✓ | With written customer authorization | Billing, interval usage | ~1-2 weeks | CSV / custom extract |
Billing Data Access
Naperville provides online billing through its eBill portal (combined electric and water bills) as PDFs. There is no CSV/structured billing export and no API. Third-party access is available only via manual request with written customer authorization under Illinois law 220 ILCS 5/16-122.
What Data Is on Your City of Naperville Electric Utility Bill
- Current and past utility bills (electric and water combined)
- Billing history (multiple months/years)
- Account balance and payment status
- Service address and account details
- Payment history
- Multiple-account viewing for customers with several locations
How to Download City of Naperville Electric Utility Bills (Business & Commercial)
- 01Enroll the business account in eBill the same way as residential
- 02For multiple locations, view all accounts under one eBill login
- 03For custom or bulk billing extracts, contact the utility at (630) 420-6059 (no self-service export)
- 04For energy projects, request data via the manual process under 220 ILCS 5/16-122
How to Download City of Naperville Electric Utility Bills (Residential)
- 01Visit the eBill enrollment page at https://www.naperville.il.us/ebill and click Enroll Now
- 02Provide your account number (with dashes) and mailing ZIP code
- 03Create username and password and set email preferences
- 04Optionally add a payment method (card or ACH)
- 05Log in at https://naperville.docugateway.com/main/login/ to view and download PDF bills
Third-Party Access to City of Naperville Electric Utility Billing Data
Manual Authorized Request (220 ILCS 5/16-122)
- 01Obtain written customer authorization specifying data and purpose
- 02Contact the utility at (630) 420-6059 with account number and authorization
- 03Pay any applicable reasonable fee and receive data by email/file transfer
Want to understand the charges on your bill?
See the City of Naperville Electric Utility Rate Schedules & Tariff Guide →Interval Data & Smart Meters
Naperville completed AMI deployment in 2012 (57,000+ smart meters) with 15-minute interval consumption data managed in Harris SmartWorks Compass. Customers view and export this data through the in-house Empower portal, which offers CSV/Excel export with a 24-hour delay and up to 3 years of history. There is no Green Button standard interface.
How to Download City of Naperville Electric Utility Interval Data via Green Button
- 01Green Button is NOT supported by Naperville
- 02Instead, enroll in Empower at https://www.empowernaperville.com using your account number and ZIP
- 03Open the usage view and select a date range
- 04Export the interval data to CSV/Excel from the Empower dashboard
Interval data is essential for rate comparison and TOU analysis.
See which City of Naperville Electric Utility rate schedule is best for your usage pattern →Third-Party API Access
Naperville does not offer a public API, developer portal, OAuth for third parties, webhooks, or real-time feeds. The CIS (Harris Utilities) and MDMS (SmartWorks Compass) back-end systems are not exposed publicly. Third-party data access is a manual request process.
How to Register as a City of Naperville Electric Utility API Vendor
- 01Obtain written customer authorization under 220 ILCS 5/16-122
- 02Submit a formal data request to the utility at (630) 420-6059
- 03Specify accounts, data type, date range, and purpose
- 04Expect manual processing (typically 1-2 weeks) and possible reasonable fees
EDI (Electronic Data Interchange)
How to Enroll in City of Naperville Electric Utility EDI
- 01EDI is not available; Naperville is a municipal utility with a captive customer base and no retail supplier switching
- 02Illinois EDI standards apply to ComEd and Ameren deregulated territories, not Naperville
- 03For data exchange, use the manual authorized-request process under 220 ILCS 5/16-122
Rate Schedules & Tariff Analysis
Naperville's 2026 C&I rates use GS1 (small commercial, no demand charge) and GS2 (large/very large/extra large commercial, with demand). GS2 has a low energy rate ($0.05568/kWh) and a substantial $22.25/kWd demand charge, so demand drives large-account bills. A monthly Purchased Power Adjustment (PPA) tied to a six-month rolling average of power costs is added to all bills.
City of Naperville Electric Utility Rate Schedule List
| Schedule | Applicability |
|---|---|
| Small Commercial (GS1) | Small commercial, no demand charge. |
| Large Commercial (GS2) | Large commercial with metered demand. |
| Extra Large Commercial (GS2) | Extra large commercial/industrial accounts. |
City of Naperville Electric Utility Rate Features & TOU Details
- GS1 small commercial: $41.77/mo + $0.11933/kWh, no demand charge
- GS2 large commercial+: $130.00/mo + $0.05568/kWh + $22.25/kWd
- Demand charge is the dominant cost driver for GS2 accounts
- Monthly Purchased Power Adjustment (PPA), six-month rolling average, revenue-neutral
- 2024 rate study set rates for 2025-2027
For a deeper analysis including cost optimization strategies and historical rate trends:
Read the full City of Naperville Electric Utility Rate Optimization Guide →Other Data Access Programs
Customer Bill of Rights (Smart Grid Initiative)
Under Naperville Municipal Code Title 8, Chapter 1, Article B, customers have rights to be informed, to privacy (no linkage of personal info to third-party-released usage without consent), to rate options (fixed or time-of-use), and to a privacy complaint process.
- 01Review the DPU-E Service Rules and Policies document
- 02Use Empower for the informed-usage right
- 03File privacy complaints with the Public Utilities Advisory Board
Illinois Municipal Electric Agency (IMEA) Power Supply
Naperville purchases wholesale power through IMEA. Rates include a monthly Purchased Power Adjustment (PPA) based on a six-month rolling average of actual power costs, reset to be revenue-neutral at each rate study.
- 01Account for the PPA line item when modeling monthly bills
- 02Review the electric rates page for current PPA methodology
- 03Contact the Customer Connections Manager for business-specific guidance
Limitations & Considerations
- ⚠No Green Button (Download My Data or Connect My Data); Empower export is not ESPI-certified
- ⚠No public API, developer portal, OAuth, or webhooks
- ⚠No EDI transactions (municipal, non-deregulated, captive customers)
- ⚠No formal aggregator partnerships at the utility; Nectar provides API access to this utility's billing data — see docs.nectarclimate.com
- ⚠No CSV/structured billing export (PDF only); no bulk bill download
- ⚠Third-party access is manual with written authorization and possible fees
- ⚠No retail supplier choice (municipal utility)
City of Naperville Electric Utility Data Access FAQ
How can a C&I customer or consultant obtain Naperville interval data?▾
The customer can self-serve 15-minute interval data through the Empower portal and export it to CSV/Excel (up to 3 years, 24-hour delay), then share it with a consultant. For a utility-issued release to a third party, the customer must provide written authorization under 220 ILCS 5/16-122 and the utility processes the request manually (typically 1-2 weeks, possible reasonable fee). There is no Green Button or API path.
What are the commercial rate classes and demand charges?▾
Small Commercial (GS1) customers pay a $41.77 monthly customer charge and $0.11933/kWh with no demand charge. Large Commercial and larger accounts (GS2) pay a $130.00 monthly customer charge, $0.05568/kWh, and a $22.25 per-kW (kWd) demand charge, plus the monthly Purchased Power Adjustment. These are 2026 rates from the utility's published rate table.
Does Naperville support Green Button, EDI, or a public API?▾
No. Naperville does not offer Green Button (DMD or CMD), EDI transactions, or a public/developer API. As a municipal utility with a captive customer base, it focuses on first-party portals (eBill, Empower). Third-party access is manual and authorization-based.
How is the Purchased Power Adjustment (PPA) calculated?▾
The PPA is a monthly bill adjustment based on actual power costs using a six-month rolling average. The PPA baseline is reset at each rate study so it is ultimately revenue-neutral to the utility. C&I customers should include the current PPA when estimating bills.
Can a third party access multiple commercial sites at once?▾
There is no aggregator portal or bulk access. Each account's data must be requested individually through the manual authorized process, or the customer can export per-site data from Empower and share it. Bulk/automated access is not available.
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