A 3,500 square foot home in Pennsylvania typically uses about 1,691 kWh per month at the state average rate of 16.8¢/kWh (EIA). With 4.2 peak sun hours per day, most homeowners need a 16.1 kW solar system — roughly 41 panels at 400W. After the 30% federal ITC, net cost is about $33,900, with 11.4-year payback and $90,400+ in estimated 25-year savings.
Content roles: This page is your Pennsylvania-specific sizing decision for 3,500 sq ft. For national methodology and roof/orientation depth, see the 3,500 sq ft national guide. For bill-based sizing, see $300/month (~$284/mo equivalent in Pennsylvania). Policy depth: Pennsylvania solar data.
⚡ System Size
How Many Solar Panels for a 3,500 sq ft House in Pennsylvania?
Pennsylvania electricity rates and sun hours change panel count versus the US average:
System size (kW) = Annual kWh ÷ (Peak sun hours × 365 × 0.82)
For 3,500 sq ft in Pennsylvania:
Estimated monthly usage: ~1,691 kWh
Peak sun hours: 4.2 h/day
System size:16.1 kW (~41 × 400W panels)
Metric
Pennsylvania
US average
Rate
16.8¢/kWh
16.3¢/kWh
Sun hours
4.2 h/day
4.5 h/day
System size
16.1 kW
15.1 kW
Panels (400W)
41
38
Pennsylvania requires a larger system than the national average for the same square footage. Use our solar system size calculator with your actual utility bills for a precise ZIP-level result.
Find your exact solar savings
Enter your ZIP code for a personalized estimate using your state's electricity rate and sun hours.
💰 System Cost
What Does Solar Cost for a 3,500 sq ft Home in Pennsylvania After the ITC?
At $3.00/W installed (SEIA 2026), a 16.1 kW system in Pennsylvania costs about $48,400 before incentives. The 30% ITC saves ~$14,520, for $33,900 net cost.
📈 Payback Period
How Long Is Solar Payback on a 3,500 sq ft Home in Pennsylvania?
A 16.1 kW system saving ~$2,966/year pays back in about 11.4 years after the ITC. At 3% rate escalation, 25-year utility spend totals ~$124,300 vs $33,900 net solar — $90,400+ lifetime advantage.
Solar vs utility company · 25-year comparison
Total cost of staying on the grid vs owning solar for a $300/month bill (national average assumptions).
Pennsylvania Solar Incentives for a 3,500 sq ft Home
Pennsylvania’s Sunshine Solar Program has offered grants and loans for solar installations. Pennsylvania has an active SREC market (Solar Renewable Energy Credits) and net metering requirements. PECO, PPL, and other utilities credit excess generation at the retail rate. The Pennsylvania PACE program enables on-bill financing.
At Pennsylvania's average rate of 16.8¢/kWh and 4.2 peak sun hours, a 3,500 sq ft home (~1,691 kWh/month) typically needs a 16.1 kW system — about 41 panels at 400W. See the [national 3,500 sq ft guide](/guides/how-many-solar-panels-3500-sq-ft-house/) for methodology.
A 16.1 kW system in Pennsylvania costs roughly $48,400 installed before incentives. The 30% federal ITC reduces net cost to about $33,900. Pennsylvania's Sunshine Solar Program has offered grants and loans for solar installations. Pennsylvania has an active SREC market (Solar Renewable Energy Credits) and net metering requirements. PECO, PPL, and other u...
At $33,900 net cost and ~$2,966/year in bill savings, simple payback in Pennsylvania is about 11.4 years.
Most Pennsylvania homeowners in this size range see **$90,400+** estimated 25-year savings vs utility power. Equivalent monthly bill: **~$284** — compare the [$300/month bill guide](/guides/solar-panels-300-month-electric-bill/) for bill-based sizing.
The US average needs a 15.1 kW system at 11.0-year payback. Pennsylvania needs 16.1 kW with 11.4-year payback at 16.8¢/kWh and 4.2 sun hours.
$300/month electric bill by state
System size and payback vary by electricity rate and sun hours — see your state.