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Duquesne Light serves 600,000+ customers in Pittsburgh and Allegheny County with a unique time-of-use rate featuring PA's widest peak window. A consistent $0.13/kWh peak-to-off-peak spread across 12 peak hours (9 AM - 9 PM) year-round means a properly sized battery can earn $380-510/year in TOU arbitrage.
$0.13
Year-Round TOU Spread
$380-510
Annual TOU Arbitrage
12 hrs
Daily Peak Window
5-8 wks
Interconnection
Duquesne Light Rate RS-TOU charges $0.25/kWh during peak hours (9 AM - 9 PM weekdays, year-round) and $0.12/kWh off-peak. The $0.13/kWh spread is consistent across all 12 months, unlike PECO which varies seasonally. A 13.5 kWh Tesla Powerwall 3 earns $380-510/year in TOU arbitrage by charging at off-peak rates and discharging during the 12-hour peak window.
Pittsburgh's cloud cover limits solar production to 1,050 kWh/kW/year (16% less than Philadelphia), but the battery strategy still works because you can charge from the grid at $0.12/kWh overnight and sell back at $0.25/kWh during the day. There is no federal residential ITC (Section 25D expired Dec 31, 2025), making TOU arbitrage the most important revenue stream after net metering savings.
Duquesne Light Company serves approximately 600,000 customers in Pittsburgh and surrounding Allegheny County. As western Pennsylvania's primary electric utility, Duquesne Light operates in a unique market where lower solar production is offset by a year-round consistent TOU spread and growing battery adoption.
Unlike PECO (5-hour summer peak) or PPL (6-hour peak), Duquesne Light Rate RS-TOU uses the same 12-hour peak window year-round. This simplicity makes battery strategy straightforward, but the wider window means you need to think differently about battery sizing.
Peak Hours
Weekdays 9 AM - 9 PM
Same schedule summer and winter. Weekends and holidays are off-peak all day.
12 hrs (DQE) vs 5 hrs (PECO)
$0.13 (DQE) vs $0.19 (PECO)
None (DQE) vs Yes (PECO)
1,050 (DQE) vs 1,250 (PECO)
$380-510 vs $550-720
12-hour advantage: Because Duquesne's peak window spans 12 hours, a larger share of your daily electricity consumption falls in the peak period. An average home using 30 kWh/day might have 20+ kWh during peak hours at Duquesne, versus only 8-10 kWh during PECO's 5-hour peak. This means the battery offsets more high-cost usage even though the per-kWh spread is lower.
Unlike PECO where summer months dominate, Duquesne's consistent year-round spread means winter months still earn meaningful arbitrage revenue. Production figures reflect Pittsburgh's 1,050 kWh/kW/year — the lowest in PA due to cloud cover.
Based on a 12 kW solar system + 13.5 kWh Tesla Powerwall 3. Arbitrage assumes 80% DoD (10.8 kWh usable) and a mix of solar + grid charging.
Jan
$22
580 kWh
Feb
$24
700 kWh
Mar
$30
950 kWh
Apr
$34
1,100 kWh
May
$38
1,250 kWh
Jun
$52
1,350 kWh
Jul
$56
1,400 kWh
Aug
$53
1,300 kWh
Sep
$46
1,100 kWh
Oct
$32
900 kWh
Nov
$23
620 kWh
Dec
$20
550 kWh
Summer Total (4 months)
$207
Winter Total (8 months)
$223
Annual Total
$430
Pittsburgh weather note: Pittsburgh averages 160 sunny days per year vs 207 in Philadelphia. Winter production drops significantly (550-700 kWh/month for a 12 kW system). However, the battery arbitrage strategy still works because you can charge from the grid at $0.12/kWh overnight and discharge at $0.25/kWh during the day. Grid charging means arbitrage revenue is less dependent on sunshine.
The 12-hour peak window at Duquesne makes battery sizing more nuanced than at PECO. A larger battery can discharge more slowly across the full 12 hours, or you can focus discharge on your highest-consumption hours within the peak window.
3.84 kW continuous | $5,500-$7,000
Daily Arbitrage
$0.53/day
Annual Arbitrage
$130-$170
Best For
Essential backup only, minimal arbitrage
Recommendation
Not ideal for TOU strategy
5 kW continuous | $10,000-$13,000
Daily Arbitrage
$0.96/day
Annual Arbitrage
$280-$360
Best For
Good balance of cost and arbitrage revenue
Recommendation
Recommended for budget-conscious
11.5 kW continuous | $12,500-$15,000
Daily Arbitrage
$1.30/day
Annual Arbitrage
$380-$510
Best For
Maximum arbitrage + full home backup
Recommendation
Best overall value for Duquesne TOU
10 kW continuous | $19,000-$24,000
Daily Arbitrage
$1.92/day
Annual Arbitrage
$480-$620
Best For
Large homes with high peak consumption
Recommendation
Diminishing returns vs. 13.5 kWh
Pro tip: With Duquesne's 12-hour peak window, a 13.5 kWh battery discharges at a moderate rate of ~0.9 kWh/hr across the full window. This covers a good portion of a typical home's baseload during peak hours. The 10 kWh Enphase IQ 10T is the budget-conscious choice with ~73% of the arbitrage value at ~80% of the cost.
Here is a complete annual revenue breakdown for a typical Duquesne Light territory installation: 12 kW solar + 13.5 kWh battery. Note the lower production vs PECO due to Pittsburgh cloud cover.
With 2% annual rate escalation, effective payback drops to ~16 years. No Section 25D ITC included (expired Dec 31, 2025).
Use the calculator below to model TOU arbitrage for Duquesne Light and compare against PECO and PPL. Select "Duquesne Light" from the utility dropdown.
Estimate your annual savings from TOU peak-shifting, net metering, and SRECs across all 4 PA investor-owned utilities.
Peak Rate
$0.28/kWh
2 PM - 7 PM weekdays
Off-Peak Rate
$0.09/kWh
Spread
$0.19/kWh
Daily Arbitrage
$1.89/day
Battery Cost
$13,500
Tesla Powerwall 3
TOU Payback
28.6 yrs
from arbitrage alone
Annual Production
15,000 kWh
Production Rate
1,250 kWh/kW
Estimates based on published utility TOU tariffs (March 2026), PA SREC market rate of $28/MWh, and 1250 kWh/kW/yr regional production. TOU arbitrage assumes 250 weekdays, 80% depth of discharge, and 92% round-trip efficiency. Section 25D ITC expired Dec 31, 2025. No PA sales tax or property tax exemptions for solar.
Duquesne Light interconnection for solar + battery typically takes 5-8 weeks — somewhat longer than PECO due to Pittsburgh's older grid infrastructure and Allegheny County permitting timelines.
File interconnection application through the Duquesne Light portal with system design, single-line diagram, and equipment specifications. Duquesne uses the PA PUC Level 1 or Level 2 interconnection process.
Duquesne reviews system design for code compliance and grid compatibility. Pittsburgh territory often requires transformer capacity checks due to older grid infrastructure in city neighborhoods.
Install solar + battery system. Schedule Allegheny County or municipal electrical inspection. Duquesne requires passing inspection before meter swap. City of Pittsburgh permits may add 1-2 weeks.
Duquesne installs bidirectional net meter. Permission to Operate (PTO) issued. System can begin exporting to grid and earning net metering credits. Duquesne PTO tends to take slightly longer than PECO.
Battery-specific note: Duquesne Light requires battery systems to have anti-islanding protection and UL 1741 SA certification. Pittsburgh's older residential grid infrastructure means some neighborhoods may require a transformer upgrade study. If your combined solar + battery AC capacity exceeds 25 kW, an additional utility engineering study is required. Residential systems under 25 kW typically proceed through the standard PA PUC Level 1 process.
PA SRECs trade on PJM-GATS at $22-35/SREC (1 SREC = 1 MWh). Duquesne territory produces fewer SRECs per kW than PECO due to Pittsburgh's lower solar irradiance (1,050 vs 1,250 kWh/kW/year).
$22-35
Per SREC (1 MWh)
PA AEPS market rate
12.6
Annual SRECs (12 kW system)
1,050 kWh/kW in Duquesne territory
$277-441
Annual SREC Income
Stacks with TOU + net metering
PRESS Act watch: The PA Renewable Energy Standard Strengthening (PRESS) Act would raise the solar carve-out from 0.5% to 5.5%, which could significantly boost SREC prices. The bill is currently pending in the PA legislature. If passed, SREC values could increase substantially across all PA utility territories, including Duquesne Light.
PECO leads PA in raw TOU spread, but Duquesne's wider peak window and consistent year-round economics create a different value proposition. Here is how they compare for a 12 kW solar + 13.5 kWh battery system.
| Metric | Duquesne Light | PECO Energy |
|---|---|---|
| Peak Rate | $0.25/kWh | $0.28/kWh (summer) |
| Off-Peak Rate | $0.12/kWh | $0.09/kWh (summer) |
| TOU Spread | $0.13/kWh | $0.19/kWh (summer) |
| Peak Window | 12 hours | 5 hours (summer) |
| Seasonal Variation | None (consistent) | Yes (lower in winter) |
| Solar Production | 1,050 kWh/kW/yr | 1,250 kWh/kW/yr |
| Annual TOU Arbitrage (PW3) | $380-510 | $550-720 |
| Annual SREC Income | $277-441 | $330-525 |
| Net Metering Savings | $2,394/yr | $3,150/yr |
| Total Annual Value | $3,177 | $4,130 |
| Interconnection | 5-8 weeks | 3-5 weeks |
Bottom line: Duquesne Light territory earns approximately 25-30% less total annual value than PECO territory for the same system size. The primary drivers are lower solar production (Pittsburgh cloud cover) and a smaller TOU spread. However, Duquesne's year-round rate consistency makes planning simpler, and the wider peak window means batteries offset a larger portion of daily usage.
With Section 25D expired, Duquesne Light customers pay full price for solar and batteries. Every revenue stream matters more than ever. TOU arbitrage and SRECs help close the gap.
For Duquesne Light customers who want solar + battery without the $53K+ upfront cost, a PPA or lease lets the financing company claim the Section 48/48E commercial ITC (30%) on projects starting construction before July 4, 2026. The savings are passed through as a lower electricity rate, typically 15-35% below your current Duquesne bill. Battery- inclusive PPAs are available in the Pittsburgh market, though fewer providers operate in western PA compared to Philadelphia.
Contact Duquesne Light customer service at 412-393-7100 or visit duquesnelight.com to request a rate schedule change from standard residential (Rate RS) to Rate RS-TOU (time-of-use). There is no fee to switch. You need a smart meter, which Duquesne installs at no charge. The change takes effect at the start of your next billing cycle.
Duquesne Light Rate RS-TOU has the same schedule year-round (no seasonal variation). Peak is approximately $0.25/kWh during weekdays 9 AM to 9 PM (a 12-hour window). Off-peak is approximately $0.12/kWh during all other hours, including weekends and holidays. This creates a consistent $0.13/kWh spread throughout the year.
Duquesne Light designed its TOU rate with a wider peak window (9 AM to 9 PM) to capture both daytime commercial demand and evening residential demand. While the peak rate ($0.25/kWh) and spread ($0.13/kWh) are lower than PECO, the 12-hour window means more of your daily usage falls in the peak period, which makes a battery especially valuable for load shifting.
For most Duquesne customers, a Tesla Powerwall 3 (13.5 kWh, 11.5 kW) offers the best balance of cost and arbitrage revenue. With the 12-hour peak window, a larger battery is more valuable here than in PECO territory. The Powerwall 3 earns $380-510/year in TOU arbitrage and provides whole-home backup. The Enphase IQ 10T (10 kWh) is a budget alternative at $280-360/year.
Duquesne Light interconnection typically takes 5-8 weeks total, slightly longer than PECO. This includes 2-4 weeks for engineering review (Pittsburgh grid infrastructure can require additional study), 1-3 days for installation, 1-2 weeks for municipal inspection, and 2-3 weeks for meter swap and PTO. City of Pittsburgh permits may add extra time.
Yes. TOU arbitrage (from your battery) and SREC income (from your solar panels) are independent revenue streams. A 12 kW solar system in Duquesne territory produces approximately 12,600 kWh/year (lower than PECO due to Pittsburgh cloud cover), generating about 12.6 SRECs worth $22-35 each ($277-441/year). Combined with $380-510/year TOU arbitrage, total battery+SREC revenue can reach $660-950/year.
Pittsburgh averages only 1,050 kWh/kW/year of solar production, roughly 16% less than Philadelphia (1,250 kWh/kW/year). This means you need a slightly larger system to achieve the same output. For TOU arbitrage, this matters less in winter when grid charging replaces solar charging. A battery still earns $0.13/kWh spread regardless of how it charges.
Duquesne TOU has a lower spread ($0.13/kWh vs $0.19/kWh summer at PECO) and lower solar production (1,050 vs 1,250 kWh/kW). However, the year-round consistent spread and wider 12-hour peak window mean more of your usage qualifies for peak pricing. Battery arbitrage earns $380-510/year vs $550-720 at PECO. Duquesne also has lower retail rates, so your net metering savings per kWh are proportionally lower.
PA charges 6% sales tax on solar and battery equipment with no exemption. On a $13,500 Tesla Powerwall 3, that adds $810. Combined with lower arbitrage revenue ($380-510/year vs PECO $550-720/year), the payback in Duquesne territory is 2-3 years longer than PECO. However, the year-round spread consistency partially compensates.
Compare PECO, PPL, Duquesne, and Met-Ed for battery arbitrage potential.
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Read moreWe design solar + battery systems optimized for Duquesne Light Rate RS-TOU. Maximize your TOU arbitrage, SREC income, and backup power with the right system for your Pittsburgh-area home.