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We deliver electricity to more than a half million customers in southwestern Pennsylvania.


Residential Customers

You can select Duquesne Light to supply your electricity.  Following is more information on residential rates. Our website also has detailed information on our price to compare, which is helpful when comparing offers from electric generation suppliers. Customers who elect to purchase their electric supply from Duquesne Light Company (DLC) will be charged according to the residential rates (RS, RH, and RA) located in the Retail Tariff.

DLC will provide and charge for transmission service consistent with the PJM Open Access Transmission Tariff approved or accepted by the Federal Energy Regulatory Commission for customers who receive their electric supply, also known as Default Service, from the company. The Transmission Service Charges are included, for informational purposes, in Appendix A of the Retail Tariff.

Customers who elect to purchase their power supply from an Electric Generation Supplier (EGS) will be responsible for paying DLC's Distribution Charge. They must purchase both their transmission and electric supply requirements from their selected EGS. Customers may change suppliers or return to DLC for electric supply as defined in Rule No. 45.

For customers who elect to purchase their electric supply from an EGS, the customer is responsible for any other charges from the EGS. Any month in which the supplier becomes unavailable or during which the customer has not chosen a supplier, DLC will supply electricity at the above Distribution and Supply Charges and the Transmission Service Charges in Appendix A.

Customers who choose an EGS may select Consolidated Billing or Separate Billing as defined in Rule No. 20.1.

To learn more about DLC's Residential Rates, please click here.

Business Customers

You can select Duquesne Light to supply your electricity.  Following is information on current rate options.  Our website also has detailed information on our price to compare, which is helpful when comparing offers from electric generation suppliers. 

Default Service Supply ("DSS") provides commercial and industrial customers with a supply rate that is determined based on a request for proposal to acquire the energy to serve the load of customers taking service under the provisions of this Rider 8. Commercial and industrial customers are defined in Rate Schedules GS/GM and GMH, and, in general, are those customers with a monthly metered demand that is less than 300 kW in a twelve (12) month period.

The Company will provide default service supply under Rider No. 8 by obtaining the requirements from suppliers through competitive procurements using a Request for Proposal ("RFP") process. DSS obtained through the RFP process includes energy, capacity, transmission and distribution line losses, congestion and congestion management costs, Alternative Energy Credits ("AECs") and other such services or products that are required to provide default service to the Company's commercial and industrial customers including Auction Revenue Rights and Financial Transmission Rights ("ARRs/FTRs"). DSS shall not include transmission service within DLC's zone or ancillary services. DLC will be responsible for and continue to provide network integration transmission service, ancillary services, and grid management charges on behalf of all default service load. The applicable charges for these services are defined in Appendix A of DLC's Retail Tariff.

Procurement Process

The Company will conduct separate RFP solicitations for DSS under this Rider approximately every six (6) months. The RFP process will be bid out separately for customers with monthly metered demand less than 25 kW and for customers with monthly metered demand equal to or greater than 25 kW to ensure that there is no cross subsidization. The Company will update the rates for the DSS according to the schedule in the above tables. The Company will issue RFPs prior to the beginning of each Application Period to update the default service supply rates. The updated rates will be based on the new price(s) available from the winning suppliers through the RFP process. The rates will include a reconciliation adjustment for the prior period as described in the "Calculation of Rate" section of this Rider. In the month prior to the beginning of each Application Period, the Company will file new DSS charges with the Pennsylvania Public Utility Commission ("Commission") for the subsequent Application Period, and, upon Commission approval, these charges shall become effective on the first day of the following month. The commercial and industrial load for the RFP will be divided into Tranches. Winning suppliers will provide DSS for the percentage of DSS load corresponding to the number of Tranches won in the RFP. DLC seeks to procure all Tranches in the RFP process pursuant to the RFP schedule approved by the Commission. The selection of bids will be submitted to the Commission for its approval or rejection within one business day after submittal. If the bids are not acted on by the Commission within one business day, the Company may proceed on the basis that they are approved and award the bids pursuant to 52 Pa. Code § 54.188(d).

Contingency Plan

In the event DLC receives bids for less than all Tranches or the Commission does not approve all or some of the submitted bids or in the event of supplier default, then DLC will provide the balance of the default supply for commercial and industrial customers through purchases in the PJM spot markets until such time that a different contingency plan is approved by the Commission. DLC will submit to the Commission within 10 days after any such occurrence an emergency plan to handle any default service shortfall. All costs associated with implementing the contingency plan will be included as part of the DSS described in the section below, "Calculation of Rate."

Calculation of Rate

DSS rates shall be determined based on the formula described in this section. The rates shall include an adjustment to reconcile revenue and expense for the previous application period. The DSS shall be determined to the nearest one-thousandth of one (1) mill per kilowatt-hour in accordance with the formula set forth below and shall be applied to all kilowatt-hours billed for default service provided during the billing month:

DSS = (((DSSa - E)/(1-T)))/S


DSS = Default Service Supply rate, converted to cents per kilowatt-hour, to be applied to each kilowatt-hour supplied to customers taking default service from the Company under this Rider.

DSSa = The total estimated direct and indirect costs incurred by the Company to acquire DSS from any source on behalf of customers described above in the "Procurement Process." The Application Period shall be for each period over which the DSS, as computed, will apply. Projections of the Company's costs to acquire default supply for the Application Period shall include all direct and indirect costs of generation supply to be acquired by the Company from any source plus any associated default service supply-related procurement and administration costs.

E = Experienced net over or undercollection of costs associated with the acquisition of supply for applicable customers ending one month prior to the end of the preceding Application Period, including applicable interest. Estimated costs will be included for the final month due to timing of the filings, with full reconciliations in the subsequent filing. Interest shall be computed monthly at the rate provided for in Section 52 Pa. Code §54.187(f), from the month the over or undercollection occurs to the month in which the overcollection is refunded or the undercollection is recouped.

S = The Company's default service retail kWh sales to customers in the applicable Customer Class, projected for the Application Period.

T = The Pennsylvania gross receipts tax rate in effect during the billing month, expressed in decimal form.

The DSS shall be filed with the Commission on or about the fifteenth day of the month prior to the start of the next Application Period. The rate shall become effective for default supply service rendered on and after the beginning of the Application Period unless otherwise ordered by the Commission, and shall remain in effect for the effective periods defined above, unless revised on an interim basis subject to the approval of the Commission. Pursuant to 52 Pa. Code §69.1809(c), upon determination that the DSS, if left unchanged, would result in a material over or undercollection of supply-related costs incurred or expected to be incurred during the effective period, the Company may file with the Commission for an interim revision of the DSS to become effective thirty (30) days from the date of filing, unless otherwise ordered by the Commission.

The Company will file with the Commission by the fifteenth day of the month prior to the next Application Period a reconciliation of the DSS revenue recovery during the immediately preceding Application Period pursuant to 66 Pa. C.S. §1307. The reconciliation shall become effective for service rendered on and after the beginning of the next calendar month and shall remain in effect until new DSS rates are approved by the Commission..

Minimum bills shall not be reduced by reason of the DSS. DSS charges shall not be a part of the monthly rate schedule minimum nor be subject to any credits or discounts. Application of the DSS shall be subject to continuous review and audit by the Commission at intervals it shall determine.

To learn more about DLC's Business Rates, please click here.

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