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Radnor Township (Wayne, Villanova, St. Davids) on the Main Line. Large homes with ~1,250 kWh/kW/year production. PECO at $0.21/kWh, SRECs ~$420/year. No federal ITC.
Cost
$2.95-$3.25
/W
System
12 kW
~$37,200
Payback
12.6 yrs
Cash
PECO
$0.21
/kWh
2026: Federal 25D expired Dec 31, 2025. All costs = $0 federal credit. PPA/lease can claim Section 48 until July 2026. Details
A 12 kW system costs $37,200 + 6% tax ($2,232) = $39,432. Payback ~12.6 years.
Gross (12 kW)
$37,200
$3.1/W
6% Tax
+$2,232
No exemption
All-In
$39,432
Cash
SREC/yr
$420
15 SRECs
Main Line homes need 8-16 kW. $3.10/W including 6% PA sales tax.
| Size | Gross | +6% | All-In | SREC/yr | Payback |
|---|---|---|---|---|---|
| 8 kW | $24,800 | +$1,488 | $26,288 | $280 | 12.6 yrs |
| 10 kW | $31,000 | +$1,860 | $32,860 | $350 | 12.6 yrs |
| 12 kW | $37,200 | +$2,232 | $39,432 | $420 | 12.6 yrs |
| 14 kW | $43,400 | +$2,604 | $46,004 | $490 | 12.6 yrs |
| 16 kW | $49,600 | +$2,976 | $52,576 | $560 | 12.6 yrs |
Monthly credits
1:1 retail ($0.21/kWh)
True-up
PTC ($0.11/kWh)
Max
50 kW
Threat
None
Large homes = large systems = bigger absolute savings
PECO $0.21/kWh — highest PA rate, best NM value
Eastern PA 1,250 kWh/kW/year — best production
No PECO policy threats
Experienced Main Line installer market
PA SRECs
15 SRECs/yr.
1:1 Net Metering
PECO full retail.
Section 48 PPA/Lease
Third-party ITC.
Federal 25D
$0.
Sales Tax
6%.
Property Tax
No exemption.
Delaware County rates:
Large colonials, estate homes
Wayne is the heart of Radnor Township with large, well-maintained homes
Ample roof area supports 12-16 kW systems on most properties
South-facing exposures on tree-lined streets provide strong production
Wayne Business District properties have some commercial solar potential
System
12-16 kW
Cost
$37,200-$49,600
Permitting
Township permit, 2-4 weeks
Estate homes, college-adjacent
Larger estate-style homes near Villanova University with excellent roof space
Mature tree canopy requires careful shading analysis on some properties
High property values support long-term solar investment
Some parcels border Villanova campus with institutional solar examples nearby
System
12-15 kW
Cost
$37,200-$46,500
Permitting
Township permit, 2-4 weeks
Mix of colonials and townhomes
Varied housing from large colonials to more modest townhomes and twins
Eastern College area has good institutional solar examples
Transit access via SEPTA Paoli/Thorndale line attracts eco-conscious residents
More affordable entry point for solar in the Radnor market
System
8-12 kW
Cost
$24,800-$37,200
Permitting
Township permit, 2-4 weeks
Gross
$37,200
6% tax
+$2,232
All-in
$39,432
NM savings/yr
$3,150
SREC/yr
$420
Prop tax/yr
-$450
Payback
~12.6 yrs
25-Yr Savings
$53,881
Upfront
$0
ITC
30% via company
Savings
20-40% lower
SRECs
Third-party
Term
20-25 yrs
Wayne advantage: Large homes = $100-$200/month PPA savings at $0 upfront.
Solar in Radnor (Wayne area) costs $2.95-$3.25 per watt, averaging $3.10/W. A typical 12 kW system costs $37,200 plus 6% PA sales tax ($2,232), totaling $39,432. No federal 25D ITC for homeowners. Larger Wayne estate homes may need 14-16 kW systems at $43,400-$49,600.
Radnor has excellent solar potential: large roof areas on Main Line homes, eastern PA irradiance at 1,250 kWh/kW/year (best in state), PECO net metering at $0.21/kWh with no policy threats, and affluent homeowners with high energy bills that solar can offset significantly.
All of Radnor Township is served by PECO Energy at $0.21/kWh. PECO offers 1:1 full retail net metering with no proposed changes. Annual true-up excess is paid at $0.11/kWh PTC rate.
Yes. PA has no property tax exemption for solar. Solar adds to your assessed value in Delaware County. For a $37,200 system, expect approximately $400-$500/year in additional property taxes. This is factored into payback calculations.
PPA is now more attractive for many Wayne homeowners. Since cash/loan purchases get $0 federal ITC, but PPA companies claim the 30% Section 48 ITC and pass savings as 20-40% lower rates, many Main Line families save $100-$150/month with $0 upfront via PPA.
Cash purchase payback for a 12 kW system in Radnor is approximately 12.6 years, driven by PECO net metering savings and SREC income. PPA has no payback period since there is $0 upfront cost — you start saving from day one.
Radnor Township requires a standard building permit for solar. No special historic district restrictions in most neighborhoods. Processing takes 2-4 weeks. Your installer handles all permitting and PECO interconnection. Some HOAs in newer developments may have aesthetic guidelines.
Pricing: EnergySage (Jan 2026), NuWatt Energy.
Utility: PECO R-1, Jan 2026.
SREC: SRECTrade, PJM-GATS (Feb 2026).
Tax: PA Revenue, Delaware County Assessment.