Solar calculator for Pennsylvania
Panels, system size, cost and payback for Pennsylvania, from your own power bill.
The average Pennsylvania home uses 817 kWh a month and pays 17.8 cents per kWh, which puts Pennsylvania at above-average electricity prices, which helps solar savings. Winter heating shapes the bill in Pennsylvania, and winter is when panels make the least, so a bill that looks big in January does not map cleanly to a bigger array. A south-facing fixed array there makes about 1,356 kWh per installed kW a year, and the worst winter month still gets 2.74 peak sun hours a day. Drop in your own bill below and the numbers on this page are replaced by yours.
A worked example for Pennsylvania
Take the average home: 817 kWh a month, which is 9,804 kWh a year, at 17.8 cents per kWh (EIA, 2024 residential averages, as of 2026-11). Sized to cover all of that use, the tool returns 7.2 kWdc and 18 panels, needing about 378 square feet of roof. The installed estimate is $18,003 (national median, EnergySage H2 2025), yearly savings are about $1,745, and simple payback is 10.3 years, with no incentive applied.
Sun and yield in Pennsylvania
We use 1,356 kWh per installed kW per year for Pennsylvania, from NREL PVWatts v8 for the state's largest city at a 20 degree south-facing tilt (via TheGreenWatt, as of 2026-11). The darkest month averages 2.74 peak sun hours a day, which matters if you plan to go off-grid or size a battery. A different roof angle or heavy shade changes this, so treat it as a starting point.
Incentives
The 30% federal tax credit ended for homeowner purchases after December 31, 2025, so none is applied here. See the tax credit guide. Look up Pennsylvania and your own utility for net metering terms and any local programs before relying on a payback number.
Planning estimate. Permits, interconnection approval and a licensed electrician are required for grid-tied systems.
Questions
How many solar panels does a Pennsylvania home need?
The average Pennsylvania home uses 9,804 kWh a year (EIA 2024). At about 1,356 kWh per installed kW, covering all of it takes 7.2 kWdc, or 18 panels. Your own bill will move that up or down.
How much does solar cost in Pennsylvania?
For the average-home example the installed estimate is $18,003 at the national median of $2.49 per watt (EnergySage, H2 2025, as of 2026-11). We have no sourced Pennsylvania price multiplier, so local quotes will differ.
Is there a federal solar tax credit in Pennsylvania?
The 30% federal tax credit ended for homeowner purchases after December 31, 2025. Check your state, utility and local programs separately.
Where does the Pennsylvania sun figure come from?
1,356 kWh per kW per year and 2.74 winter peak sun hours come from NREL PVWatts v8 runs for Pennsylvania's largest city, compiled by TheGreenWatt (as of 2026-11). Real yield varies across the state.
Is my bill uploaded?
No. Your bill is read in your browser and never uploaded.