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Get a Free QuoteYour utility determines how fast solar pays for itself in PA. Electricity rates, net metering rules, SREC income, and solar irradiance all vary by territory. This guide compares every PA utility so you can estimate your real payback period.
7
Electric Utilities
10-14 yr
Payback Range
$25-35
Per SREC
0%
Sales Tax on Solar
PPL Electric Utilities has proposed switching from 1:1 full retail net metering to hourly LMP-based wholesale credits. This would reduce net metering value by 70-80% for PPL customers in the Lehigh Valley, Harrisburg, Scranton, and central PA. Systems installed before the change may be grandfathered under current 1:1 rates.
These three utilities serve the vast majority of PA residential solar customers. Together they cover Philadelphia, the Lehigh Valley, Harrisburg, and Pittsburgh — the state's population centers.
Philadelphia + 4 surrounding counties (SE PA)
Avg Rate
$0.21/kWh
PTC True-Up
$0.110/kWh
Interconnection
4-8 weeks
Peak Sun Hours
4.5-4.9 hrs
Central/eastern PA (Allentown, Lancaster, Harrisburg area)
Avg Rate
$0.21/kWh
PTC True-Up
$0.130/kWh
Interconnection
2-4 weeks
Peak Sun Hours
4-4.5 hrs
Pittsburgh area (Allegheny/Beaver counties)
Avg Rate
$0.20/kWh
PTC True-Up
$0.124/kWh
Interconnection
2-4 weeks
Peak Sun Hours
3.5-4 hrs
FirstEnergy operates four distribution companies across Pennsylvania, serving rural and mid-sized markets. Rates vary by subsidiary, but all share the same 1:1 net metering structure and generally faster interconnection timelines.
| Subsidiary | Service Area | Avg Rate | PTC Rate | Interconnection |
|---|---|---|---|---|
| Met-Ed | Reading, York, Lancaster, south-central PA | $0.19/kWh | $0.119/kWh | 2-3 weeks |
| Penelec | Erie, State College, northeastern PA | $0.18/kWh | $0.110/kWh | 2-3 weeks |
| Penn Power | New Castle area, northwest PA | $0.19/kWh | $0.119/kWh | 2-3 weeks |
| West Penn Power | Greensburg, Johnstown, southwest PA | $0.17/kWh | $0.103/kWh | 2-3 weeks |
Note: All FirstEnergy subsidiaries offer stable 1:1 net metering with no proposed policy changes. However, rates are generally lower than PECO or PPL, resulting in slower payback periods. West Penn Power at $0.17/kWh has the lowest rate and slowest payback in the state.
Side-by-side comparison of a 10 kW residential solar system across PA utility territories. Cost assumes $2.95-$3.05/W installed. No federal tax credit (Section 25D expired December 31, 2025). Includes net metering savings and SREC income at $28/SREC average.
| Rank | Utility | Rate | Annual kWh | NM Value/yr | SREC/yr | Total/yr | Payback |
|---|---|---|---|---|---|---|---|
| 1 | PECO | $0.21 | 12,500 | $2,625 | $308 | $2,933 | 10.4 yr |
| 2 | PPL Electric | $0.21 | 11,500 | $2,415 | $322 | $2,737 | 11.1 yr |
| 3 | Duquesne Light | $0.20 | 10,500 | $2,100 | $294 | $2,394 | 12.3 yr |
| 4 | Met-Ed (FirstEnergy) | $0.19 | 11,500 | $2,185 | $322 | $2,507 | 11.8 yr |
| 5 | Penelec (FirstEnergy) | $0.18 | 10,000 | $1,800 | $280 | $2,080 | 14.2 yr |
| 6 | West Penn Power | $0.17 | 10,500 | $1,785 | $294 | $2,079 | 14.2 yr |
Best case (PECO): 10.4-year payback driven by the highest retail rate and best solar irradiance in the state. Annual savings of $2,933 include $2,625 in avoided electricity costs and $308 in SREC income.
Worst case (West Penn): 14.2-year payback due to the lowest retail rate ($0.17/kWh) and lower western PA irradiance. Still profitable over a 25-year panel lifespan, but a slower start.
1:1 full retail rate credit (monthly). The monthly credit is great, but the annual true-up is where value gets lost if you overproduce.
Each month, excess generation earns credits at your full retail rate ($0.17-$0.21/kWh depending on utility). Credits roll forward month to month. This is the strongest part of PA net metering.
At the 12-month true-up (typically June), any remaining net excess is paid at the Price-to-Compare (PTC) rate. PTC is the supply-only portion — 40-50% less than full retail.
Size your solar system to offset 90-95% of annual usage rather than overproducing. Excess energy at the annual true-up earns only the PTC rate ($0.103-$0.13/kWh), which is 40-50% less than the full retail credit you get month to month. A slightly undersized system maximizes the value of every kWh produced.
Pennsylvania SRECs (Solar Renewable Energy Certificates) are an additional income stream on top of net metering. One SREC equals 1 MWh of solar production, registered through PJM-GATS.
$22-$35
Per SREC (1 MWh)
~11
SRECs/yr (10 kW system)
$250-$385
Annual SREC income
The pending PRESS Act (PA Renewable Energy Standard Strengthening) would raise the solar carve-out from 0.5% to 5.5%. If passed, this would dramatically increase demand for PA SRECs and could push prices significantly higher. The current 0.5% carve-out is the weakest in the Mid-Atlantic region, which is why PA SREC prices are lower than NJ ($200+) or DC ($300+).
Register your system through PJM-GATS (Generation Attribute Tracking System). SRECs are generated automatically based on metered production. Sell through aggregators like SRECTrade or Flett Exchange. SRECs have a 3-year useful life from their vintage year, so sell promptly to maximize value.
PA does not have significant TOU rate spreads or demand response programs like some states. The primary battery value is backup power, with modest TOU arbitrage available from PECO, PPL, and Duquesne.
Bottom line: A home battery in PA makes sense primarily for backup power reliability. TOU arbitrage adds $130-$240/year at best, which alone does not justify the $10,000-$15,000 battery cost. If outage protection is important to you, battery storage is a worthwhile addition to your solar system.
While PA lacks a state solar tax credit, two meaningful incentives remain: the Act 129 energy efficiency programs and the solar equipment sales tax exemption.
Act 129 requires PA utilities to reduce customer electricity consumption. While it does not directly subsidize solar, it funds rebates on efficiency upgrades that pair with solar:
Reduce consumption first, then size solar to offset the remainder for the fastest combined payback.
Pennsylvania does not charge sales tax on solar energy equipment. With a standard state sales tax of 6%, this represents meaningful savings:
Note: Philadelphia (8%) and Allegheny County (7%) have higher combined rates, so savings are even greater in those areas. However, PA does NOT exempt solar from property tax assessments.
Eastern PA produces approximately 20% more solar energy than western PA. Your location determines both production capacity and which utility serves you.
Peak Sun Hours
4.5-4.9 hrs
Annual per kW
1,250 kWh
Best irradiance in the state. PECO territory.
Peak Sun Hours
4-4.5 hrs
Annual per kW
1,150 kWh
Moderate production. PPL and Met-Ed territory.
Peak Sun Hours
3.5-4 hrs
Annual per kW
1,050 kWh
Lower irradiance due to cloud cover. Duquesne Light and West Penn territory.
Peak Sun Hours
3.3-3.5 hrs
Annual per kW
1,000 kWh
Lowest production in PA. Lake-effect cloud cover significantly reduces output. Penelec territory.
Eastern PA
$2,975
/yr (NM + SRECs)
Central PA
$2,737
/yr (NM + SRECs)
Western PA
$2,394
/yr (NM + SRECs)
Erie PA
$2,080
/yr (NM + SRECs)
PA electricity rates increased approximately 20% year-over-year, driven by PJM capacity auction price surges. This trend makes solar more valuable every year.
~20%
Year-over-year rate increase across PA
2-3%
Expected annual escalation beyond 2026
$128/yr
Added value per $0.01/kWh rate increase
Every $0.01/kWh increase in your utility rate adds approximately $128/year in net metering value for a typical 12.8 kW PA system. With rates projected to continue rising 2-3% annually, a system installed today becomes more valuable each year. The current 10-14 year payback range could effectively compress by 1-2 years when accounting for rate escalation over the system's 25-year lifespan.
PECO territory in southeastern Pennsylvania has the fastest solar payback at approximately 10.4 years for a 10 kW system. This is driven by a combination of the highest retail rate ($0.21/kWh), the best solar irradiance in the state (4.5-4.9 peak sun hours), and stable net metering policy. PPL territory ties on rate but has lower production and faces a proposed net metering policy change.
PA net metering credits excess solar generation at the full retail rate on a monthly basis. Credits roll forward month to month. At the annual true-up (typically June), any remaining net excess is paid at the Price-to-Compare (PTC) rate, which is the supply-only portion of your bill. PTC rates range from $0.103/kWh (West Penn Power) to $0.13/kWh (PPL). The 1:1 monthly credit applies to all PA utilities, and systems can be sized up to 200% of annual usage.
PPL Electric has proposed switching from 1:1 full retail net metering credits to hourly LMP (Locational Marginal Price) based credits. This would replace the current $0.21/kWh retail credit with wholesale rates averaging $0.04-$0.06/kWh, reducing net metering value by approximately 70-80%. The change is expected around July 2026. Systems installed before the effective date may be grandfathered under current 1:1 rates.
Pennsylvania SRECs (Solar Renewable Energy Certificates) trade at $25-$35 per SREC on the PJM-GATS market. One SREC equals 1 MWh of solar production. A typical 10 kW system in eastern PA generates approximately 11 SRECs per year, worth $275-$385 annually. SREC values do not vary by utility territory. The PRESS Act, if passed, would raise the solar carve-out from 0.5% to 5.5% and could significantly boost SREC prices.
Yes. Pennsylvania does not charge sales tax on solar energy equipment. This is effectively a built-in savings since PA's standard sales tax rate is 6% (8% in Philadelphia and Allegheny County with local surcharges). On a $30,000 system, that saves $1,800-$2,400 compared to states that do tax solar equipment. However, PA does NOT exempt solar from property tax assessments, meaning your property value increase from solar will be reflected in property taxes.
Solar is still viable in western PA (Duquesne Light and West Penn Power territory) but with a longer payback period of 12-14 years versus 10-11 years in eastern PA. Western PA gets 3.5-4.0 peak sun hours versus 4.5-4.9 in the east, producing roughly 20% less energy. Lower installation labor costs partially offset the production gap. Ground-mount systems and optimal tilt angles can help maximize output in cloudier western PA.
Battery storage in PA is primarily valuable for backup power rather than energy arbitrage. PECO, PPL, and Duquesne Light offer time-of-use rates, but the peak-to-off-peak spread is modest compared to states like California or Connecticut. PECO offers the best TOU spread at $0.29/kWh peak versus $0.13/kWh off-peak, making battery arbitrage worth $180-$240 per year. For most PA homeowners, the battery ROI case rests on backup power value during outages rather than rate arbitrage.
Act 129 requires PA electric utilities to reduce electricity consumption and peak demand through energy efficiency programs. While Act 129 itself does not directly incentivize solar, it drives utility rebates on heat pumps, insulation, and other efficiency upgrades that pair well with solar. Reducing your energy consumption first, then sizing solar to offset the remainder, delivers the fastest combined payback. Check your utility's Act 129 marketplace for available rebates.
Solar interconnection timelines vary by utility. PECO takes the longest at 4-8 weeks due to higher volume in the Philadelphia metro area. PPL and Duquesne Light typically complete interconnection in 2-4 weeks. FirstEnergy subsidiaries (Met-Ed, Penelec, Penn Power, West Penn Power) are generally the fastest at 2-3 weeks. There are no residential interconnection fees for systems under 50 kW in PA.
Yes, through net metering. Month to month, excess generation earns 1:1 retail rate credits. At the annual true-up (typically June), any remaining net excess is purchased at the lower PTC rate ($0.103-$0.13/kWh). You also earn SRECs ($25-$35 per MWh) that can be sold on the PJM-GATS market. For maximum value, size your system at 90-95% of annual usage to minimize PTC true-up losses.
We analyze your utility territory, rate plan, roof exposure, and energy usage to design the optimal system. PPL customers: act before the proposed net metering changes take effect.