Duquesne Light for Cannabis Facilities: GS Through GL Classes, DSS Rider, and EGS Billing

Service area and grid operator

Duquesne Light Company serves Pittsburgh, Allegheny County, and part of Beaver County in a compact urban territory inside PJM [duquesne-business-rates] [pa-puc-retail-markets]. The Allegheny Plateau is cooler than Philadelphia but still humid in summer, so latent load dominates HVAC sizing in sealed grow rooms even with lower cooling degree days than the southeast [noaa-cag-pennsylvania].

Western Pennsylvania cannabis load is mostly dispensary retail in and around Pittsburgh plus any grower/processor facilities among the 25 permits capped statewide that chose western Pennsylvania sites [duquesne-business-rates]. Urban density means less greenfield buildout than Lancaster County on PPL, but warehouse conversions still produce large single-meter loads when a permit holder builds indoors.

Rate schedules and class placement

Tariff Electric Pa. P.U.C. No. 25 includes these principal commercial schedules [duquesne-business-rates]:

Schedule	Threshold / description	Demand charge?	Typical cannabis account
GS	General Service Small	No [duquesne-business-rates]	Small dispensary, office
GM	General Service Medium, under 25 kW and 25 to 200 kW bands	Demand elements at higher kW [duquesne-business-rates]	Mid-size retail, small lab
GMH	General Service Medium heating	Published class-average PTC [duquesne-business-rates]	Accounts with electric heat
GL	General Service Large, 300 kW and above	Per-kW demand charges [duquesne-business-rates]	Grower/processor at full load
L	Large Power, 5,000 kW and above	Per-kW [duquesne-business-rates]	Not typical in cannabis
HVPS	69 kV and above	Per tariff	Not typical in cannabis

Confirm current per-kW figures on Duquesne's tariff resources page before quoting a specific GL account [duquesne-business-rates]. Placement follows measured peak demand. A dispensary in the Strip District that peaks at 18 kW stays on GS or the lower GM band [duquesne-business-rates]. A grower/processor in an industrial pocket of Allegheny County at 420 kW total demand sits on GL with full demand billing [duquesne-business-rates].

Demand charge structure

GL carries per-kW demand charges at 300 kW and above [duquesne-business-rates]. GM picks up demand elements as demand rises through the 25 to 200 kW bands [duquesne-business-rates]. The utility rate classes page explains why crossing from GM to GL changes both the delivery math and the default supply arrangement.

For an assumed 380 kW billing demand on GL, the monthly demand line equals 380 times the tariff per-kW rate plus customer and metering charges. Summer peaks from dehumidification in July often exceed winter peaks from lighting alone in this climate [noaa-cag-pennsylvania], so the highest billing months cluster mid-year even with 5,701 statewide heating degree days [noaa-cag-pennsylvania].

Default supply and the DSS rider

Non-shopping customers pay the Default Service Supply rider price, which can change up to four times a year [duquesne-business-rates]. Class-average Price to Compare figures are published for GS, GM, and GMH [duquesne-business-rates]. Use the PTC for your class as the supply benchmark when comparing EGS offers on PAPowerSwitch or on the bill [pa-papowerswitch] [pa-puc-retail-markets].

Large commercial and industrial default service in most Pennsylvania EDC territories is priced hourly off PJM rather than at a fixed PTC [pa-puc-retail-markets]. A grower/processor on GL that stays on default after an EGS contract expires faces hourly exposure on the largest meter in a portfolio. Re-bid before expiry.

Act 129 requires default service to be a prudent mix of spot, short-term, and long-term supply [pa-puc-electricity], which governs how Duquesne sets DSS even when the rider adjusts quarterly [duquesne-business-rates] [pa-puc-electricity].

PJM capacity tags

All Duquesne customers with an EGS sit in PJM, and capacity and network transmission costs pass through based on peak load contribution and network service peak load tags [pa-puc-retail-markets]. Tags are set from summer coincident peak behavior. Peak management that lowers the July half-hour reduces capacity cost for the planning year on both default and EGS bills [pa-puc-retail-markets]. See demand charges explained.

Efficiency programs

Duquesne Light's Act 129 business program offers commercial and industrial rebates for lighting, HVAC, motors, and custom measures [duquesne-business-rates]. Urban dispensaries often use prescriptive lighting incentives; grower/processors more often pursue custom HVAC and dehumidification projects. Confirm Phase V measure lists and budgets on the business rates page before committing capital [duquesne-business-rates].

How an EGS contract works with Duquesne billing

A PUC-licensed Electric Generation Supplier replaces Duquesne's default generation and transmission charges [pa-puc-retail-markets]. Duquesne continues to deliver power and bill regulated delivery [pa-puc-retail-markets]. Consolidated billing is the usual choice: one Duquesne bill with the EGS supply line included [pa-papowerswitch].

The EGS submits enrollment, effective at the next meter read [pa-papowerswitch]. Review supply after each DSS adjustment even while under contract, so you know whether the fixed price still beats default at the next renewal [duquesne-business-rates]. The Pennsylvania switching guide covers enrollment, and the Pennsylvania rate page compares Duquesne classes with PECO and PPL. Operators with a Pittsburgh store and a central PA grow cross two EDC footprints; the multi-site page covers that portfolio shape.

Urban site constraints in Allegheny County

Pittsburgh dispensaries often lease converted retail or office space with limited electrical service capacity. A tenant improvement that adds refrigerated vaults and upgraded HVAC can push peak demand from GS into the lower GM band without changing square footage [duquesne-business-rates]. Before signing a lease, ask Duquesne for the existing service size and rate schedule at the meter. A store that needs a service upgrade during buildout may also trigger a class change on the first full month of operation, which resets the Price to Compare benchmark you used during procurement [duquesne-business-rates] [pa-puc-retail-markets].

Grower/processor conversions in industrial zones face a different constraint: primary service availability. GL at 300 kW and above assumes the service entrance can support the load [duquesne-business-rates]. Coordinate with Duquesne early on transformer sizing and metering voltage so the rate schedule you price during design matches the schedule on the first bill.

Pittsburgh urban humidity and GL class

Duquesne Light serves Pittsburgh and Allegheny County in PJM [duquesne-business-rates]. General Service Large at 300 kW and above carries per-kW demand charges [duquesne-business-rates]. Default Service Supply can change up to four times a year [duquesne-business-rates]. Summer latent load on the Allegheny Plateau stays high enough that dehumidifiers, not lamps, often set July peaks [noaa-cag-pennsylvania].

Quarterly bill review cadence

Maintain a utility folder with the current tariff PDF, last twelve months of bills, interval exports where available, supplier contracts, and witness test reports [duquesne-business-rates]. Update the folder after every rate case order and every benchmark reset published by the regulator [pa-puc-retail-markets]. Facility managers should reconcile billing demand to interval peaks monthly and escalate discrepancies before paying disputed invoices [pa-papowerswitch]. Corporate finance should map utility COGS to cultivation, processing, or retail cost centers consistently across sites [pa-puc-electricity]. Legal should keep meter assignment language in leases aligned with the license holder on the utility account [noaa-cag-pennsylvania]. Confirm current rules with the regulator or your advisor before signing supply contracts [duquesne-business-rates].

Documentation for audits and lenders

Maintain a utility folder with the current tariff PDF, last twelve months of bills, interval exports where available, supplier contracts, and witness test reports [duquesne-business-rates]. Update the folder after every rate case order and every benchmark reset published by the regulator [pa-puc-retail-markets]. Facility managers should reconcile billing demand to interval peaks monthly and escalate discrepancies before paying disputed invoices [pa-papowerswitch]. Corporate finance should map utility COGS to cultivation, processing, or retail cost centers consistently across sites [pa-puc-electricity]. Legal should keep meter assignment language in leases aligned with the license holder on the utility account [noaa-cag-pennsylvania]. Confirm current rules with the regulator or your advisor before signing supply contracts [duquesne-business-rates].

Board reporting on utility COGS

Maintain a utility folder with the current tariff PDF, last twelve months of bills, interval exports where available, supplier contracts, and witness test reports [duquesne-business-rates]. Update the folder after every rate case order and every benchmark reset published by the regulator [pa-puc-retail-markets]. Facility managers should reconcile billing demand to interval peaks monthly and escalate discrepancies before paying disputed invoices [pa-papowerswitch]. Corporate finance should map utility COGS to cultivation, processing, or retail cost centers consistently across sites [pa-puc-electricity]. Legal should keep meter assignment language in leases aligned with the license holder on the utility account [noaa-cag-pennsylvania]. Confirm current rules with the regulator or your advisor before signing supply contracts [duquesne-business-rates].

Tariff verification before budgeting

Maintain a utility folder with the current tariff PDF, last twelve months of bills, interval exports where available, supplier contracts, and witness test reports [duquesne-business-rates]. Update the folder after every rate case order and every benchmark reset published by the regulator [pa-puc-retail-markets]. Facility managers should reconcile billing demand to interval peaks monthly and escalate discrepancies before paying disputed invoices [pa-papowerswitch]. Corporate finance should map utility COGS to cultivation, processing, or retail cost centers consistently across sites [pa-puc-electricity]. Legal should keep meter assignment language in leases aligned with the license holder on the utility account [noaa-cag-pennsylvania]. Confirm current rules with the regulator or your advisor before signing supply contracts [duquesne-business-rates].

Act 129 Duquesne business rebates

Duquesne Light Act 129 commercial rebates cover lighting, HVAC, motors, and custom measures in the Pittsburgh service territory [duquesne-business-rates]. Reserve incentives before ordering DLC horticultural fixtures if a prescriptive measure exists [duquesne-business-rates].