FAQs
All FAQs
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FAQ-32:
Where can I find ICAP Weather Factors for each load profile?
ICAP Weather Factors are available in the Data Room - Additional Data section of the RFP website.
07/29/2025 in Data
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FAQ-31:
What are the line loss factors for calculating retail load from wholesale load?
The loss percentages for each customer class are available in PECO’s Current Electric Generation Supplier Tariff (see 6.6 Line Losses on page 30) available here: Current Electric Rate Information | PECO - An Exelon Company.
07/29/2025 in Data
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FAQ-30:
What is PECO’s two-step process to settle the hourly load obligations with each LSE and PJM?
PECO settles hourly load obligations with each LSE and PJM via a two-step process:- Settlement A – PECO determines the estimated “day after” (delivery day) hourly load responsibility by recreating the load characteristics of the delivery day in question using a combination of available known, preliminary, and historically-based information. PECO then submits the load responsibility for all LSEs serving load on the settled day(s) to PJM in accordance with PJM procedural requirements and energy market schedules.
- Settlement B – PECO determines the final hourly load responsibility approximately 60 days after an energy delivery month by reconciling actual individual customer meter readings and applicable load profile data with the Settlement A data for that month. PECO then calculates and submits the energy variances from Settlement A hourly scheduling for all LSEs to PJM in accordance with PJM procedural requirements and energy market schedules.
PECO provides an overview of the determination of hourly load obligations on their website here: https://electricandgaschoice.force.com/s/article/Determination-of-Hourly-Load-Obligations-Overview.
07/29/2025 in Data
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FAQ-29:
Is the daily peak load contribution (“PLC”) or the daily network transmission service peak load (“NSPL”) data scaled using the daily zonal scaling factors?
The daily peak load contribution (“PLC”) and network transmission service peak load (“NSPL”) data provided in Data Room are not scaled by the daily zonal scaling factor. The daily zonal scaling factors are provided in the file “PECO Daily Zonal Scaling Factor”.
07/29/2025 in Data
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FAQ-28:
Is the daily peak load contribution (“PLC”) and network transmission service peak load (“NSPL”) data adjusted for the NYPA allocation? Why is the sum of the values across the detail sheets not always exactly equal to the values on the summary sheet in the “PECO R PLC&NSPL Data” file?
The daily peak load contribution (“PLC”) and network transmission service peak load (“NSPL”) data for the Residential class are not adjusted for the NYPA allocation. The differences are due to the loss of precision—the Summary Sheet and Detail Sheet are published independently to one decimal. As a result, the summary sheet is a more accurate representation of total than adding up details.
07/29/2025 in Data
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FAQ-27:
Is the hourly load data in the Data Room already adjusted to include UFE? How does PECO allocate UFE?
The hourly load data in the Data Room has already been adjusted to include Unaccounted for Energy (“UFE”).PECO allocates UFE to all Load Serving Entities in the PECO zone (i.e., to EGS and default service Load Serving Entities) each month based on load-ratio share. Prior to March 2015 UFE is allocated to monthly-metered customers and not to hourly/interval metered customers. Starting in March 2015 UFE is allocated to all customers, including hourly/interval metered customers.
07/29/2025 in Data
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FAQ-26:
Are the Hourly PJM Deration Factors for the PECO Zone provided in Eastern Standard Time or Eastern Prevailing Time?
Hourly reports align with Eastern Prevailing Time. For instance, Hour 1 pertains to the hour between 12:00 a.m. EPT and 1:00 a.m. EPT. Daylight Savings Time (DST) is treated as follows:- Hourly reports spanning the Fall DST period contain 25 consecutive hours.
- Hourly reports spanning the Spring DST period contain 23 consecutive hours.
For more information please see the Data Description document posted to the Data Room.
07/29/2025 in Data
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FAQ-25:
Can you confirm that the hourly load data, and daily PLC and NSPL data in the Data Room has not already been adjusted for the NYPA allocation?
The daily peak load contribution (“PLC”) and network transmission service peak load (“NSPL”) data for the Residential class are not adjusted for the NYPA allocation. Hourly load data for the Residential Class, which is broken down by load related to PECO’s default service customers (“Default Energy”) and load related to customers who have elected to be supplied by an Electric Generation Supplier (“EGS Energy”), is handled differently. In regard to the hourly load data for the Residential class, PECO subtracts the NYPA allocation from the Default Energy (MWh) column and adds a corresponding amount to the EGS Energy (MWh) column. For more information see the data description document posted to the Monthly data page in the Data Room.
07/29/2025 in Data
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FAQ-24:
Does the hourly load data provided in the Data Room include transmission and distribution loss factors?
The hourly load data provided in the Data Room includes both applicable distribution and transmission losses. These hourly load values will be de-rated by PJM for marginal losses prior to energy settlement. PECO provides hourly marginal loss deration factors in the Data Room. Please see Section 3.a.iii. Assumptions on page 10 of the data description document for assumptions and additional information related to the hourly energy data provided.
07/29/2025 in Data
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FAQ-23:
Has PECO implemented a time-of-use (“TOU”) rate option for residential and small commercial customers?
PECO has implemented a TOU rate option for default service customers. Any residential customer who elects to go on TOU rate will be assigned to the residential default load. Any small commercial customer who opts to go on the TOU rate will be assigned to the small commercial default service load. See Tariff information for TOU rates for Procurement Class 1 (residential) and Procurement Class 2 (small commercial): https://www.peco.com/MyAccount/MyBillUsage/Pages/CurrentElectric.aspx.
07/29/2025 in General , Rates
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