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Upper Merion Township (King of Prussia) blends suburban residential with corporate parks. ~1,250 kWh/kW/year production, PECO at $0.21/kWh, SRECs ~$385/year. No federal ITC for homeowners.
Cost
$2.85-$3.15
/W
System
11 kW
~$33,000
Payback
12.2 yrs
Cash
PECO
$0.21
/kWh
2026: Federal 25D expired. All costs = $0 federal credit. PPA/lease can claim Section 48 until July 2026. Details
11 kW = $33,000 + 6% tax ($1,980) = $34,980. Payback ~12.2 years.
Gross (11 kW)
$33,000
$3/W
6% Tax
+$1,980
No exemption
All-In
$34,980
Cash
SREC/yr
$385
13.8 SRECs
KOP-area homes typically need 7-15 kW. $3.00/W including 6% PA sales tax.
| Size | Gross | +6% | All-In | SREC/yr | Payback |
|---|---|---|---|---|---|
| 7 kW | $21,000 | +$1,260 | $22,260 | $245 | 12.2 yrs |
| 9 kW | $27,000 | +$1,620 | $28,620 | $315 | 12.2 yrs |
| 11 kW | $33,000 | +$1,980 | $34,980 | $385 | 12.2 yrs |
| 13 kW | $39,000 | +$2,340 | $41,340 | $455 | 12.2 yrs |
| 15 kW | $45,000 | +$2,700 | $47,700 | $525 | 12.2 yrs |
Monthly
1:1 retail ($0.21/kWh)
True-up
PTC ($0.11/kWh)
Max
50 kW res / 3 MW commercial
Threat
None
Corporate/suburban mix creates demand for both residential and commercial solar
PECO $0.21/kWh — highest in PA
Newer construction has modern roof designs and electrical panels
Commercial properties can claim Section 48 ITC (30%+ through July 2026)
Strong property values support solar investment
PA SRECs
13.8 SRECs/yr.
1:1 Net Metering
PECO full retail.
Section 48 PPA/Lease
Third-party ITC. July 2026 deadline.
Federal 25D
$0 for homeowners.
Sales Tax
6% PA.
Property Tax
No exemption.
Montgomery County rates:
Suburban single-family, townhomes
Newer construction (1990s-2010s) with modern electrical panels and clean roof lines
Many south-facing homes in planned developments ideal for solar
Some HOAs may have aesthetic guidelines — panels on rear-facing roofs often pre-approved
Corporate presence drives environmental awareness and solar adoption
System
10-14 kW
Cost
$30,000-$42,000
Permitting
Township permit, 2-4 weeks
Older single-family, mixed
Older housing stock (1940s-1970s) with simple roof geometries
Smaller lots but minimal shading in most areas
More affordable entry point for solar in Upper Merion
Good transit access via SEPTA Norristown line
System
8-10 kW
Cost
$24,000-$30,000
Permitting
Township permit, 2-4 weeks
Estate and executive homes
Larger executive homes with expansive roofs support 12-15 kW+ systems
Proximity to Valley Forge National Park means some large-lot properties with excellent sun exposure
Higher property values support premium solar investment
Some properties near Valley Forge may have view restrictions
System
12-15 kW
Cost
$36,000-$45,000
Permitting
Township permit, 2-4 weeks
Gross
$33,000
6% tax
+$1,980
All-in
$34,980
NM/yr
$2,888
SREC/yr
$385
Prop tax/yr
-$450
Payback
~12.2 yrs
25-Yr
$50,887
Upfront
$0
ITC
30% via company
Savings
20-40% lower
SRECs
Third-party
Term
20-25 yrs
KOP commercial angle: Business owners can claim Section 48 ITC directly — talk to us about commercial solar for KOP office and retail properties.
Solar in Upper Merion (King of Prussia area) costs $2.85-$3.15 per watt, averaging $3.00/W. A typical 11 kW system costs $33,000 plus 6% PA sales tax ($1,980), totaling $34,980. No federal 25D ITC for homeowners in 2026.
All of Upper Merion Township is served by PECO Energy at $0.21/kWh. PECO offers 1:1 full retail net metering with no proposed changes. This is the same favorable policy as Philadelphia and other PECO-territory suburbs.
Yes. KOP has significant commercial solar potential. Businesses can claim the Section 48/48E ITC (30% base + potential bonuses) for projects beginning construction before July 4, 2026. Large commercial rooftops at KOP Mall area, office parks, and warehouses are excellent candidates. Commercial systems also earn SRECs.
Yes. PA has no property tax exemption for solar. Solar adds to assessed value in Montgomery County. For a $33,000 system, expect ~$400/year in additional property taxes. This is factored into all payback calculations.
Most HOAs in Upper Merion allow solar panels but may have aesthetic guidelines. Panels on rear-facing or non-street-visible roof sections are typically approved without issue. PA does not have a specific solar access law that overrides HOA restrictions, so check your HOA covenants early in the process.
Cash purchase payback for an 11 kW system is approximately 12.2 years, driven by PECO net metering and SREC income. PPA/lease has $0 upfront and saves 20-40% on PECO bills immediately.
An 11 kW system produces about 13.75 SRECs/year. At $22-$35 each, that is $303-$481 annually. SRECs are traded on PJM-GATS. If the PRESS Act passes, SREC values could increase significantly.
Assess your KOP-area roof and PECO potential.
Pricing: EnergySage (Jan 2026), NuWatt Energy.
Utility: PECO R-1, Jan 2026.
SREC: SRECTrade, PJM-GATS (Feb 2026).
Tax: PA Revenue, Montgomery County.