Solar Panels in King of Prussia, PA: Cost, Payback & Savings
A typical 7.6 kW home solar system in King of Prussia costs about $27,360 and pays for itself in about 11.8 years, saving roughly $39,168 over 25 years at Pennsylvania's average electricity price of 21.0¢/kWh.
Monthly solar production in King of Prussia
Estimated output of a 7.6 kW south-facing roof system. Jul is the strongest month (1,047 kWh); Dec the weakest (493 kWh).
Solar production (kWh) Typical home use, 817 kWh/month
Solar payback calculator for King of Prussia
Pre-filled with King of Prussia's sunshine and Pennsylvania's average electricity price. Enter your own bill and an installer's price per watt to see your payback.
Leave export credit blank where the utility offers full net metering. Where exports earn less, solar used at home as it's produced is worth the full price and the rest earns the export credit.
How King of Prussia compares
- Each kW of panels here produces about 1,301 kWh a year — 5% more than the Pennsylvania median and 5% less than the US median city (1,371 kWh).
- Payback ranks #37 of 121 Pennsylvania places we cover.
- Sunshine varies little across a state; electricity price, installed cost and how utilities credit exported power drive most of the difference between states.
Net metering, tax credits and incentives in 2026
Pennsylvania offers net metering: power you send to the grid is credited at or near the retail price, so every solar kWh is valued at 21.0¢ here.
There is no federal tax credit for buying home solar installed in 2026. The 30% Residential Clean Energy Credit (Section 25D) ended for systems placed in service after December 31, 2025, so the costs and paybacks on this page include no federal credit.
Pennsylvania and local utilities may still offer rebates, performance payments, property-tax or sales-tax exemptions. Search the DSIRE incentives database for Pennsylvania and ask installers which programs they apply for you.
Frequently asked questions
Is solar worth it in King of Prussia, PA?
For a typical home, a solar system pays for itself in about 11.8 years and then keeps saving money. Over 25 years the estimated net savings are $39,168. Verdict: solid long-term investment. Your own payback depends on your roof, your bill and the quotes you get.
How many solar panels do I need in King of Prussia, PA?
A home using 817 kWh a month (the Pennsylvania average) needs about 19 panels of 400 W — a 7.6 kW system — to cover its annual use. Divide your own yearly kWh by 1,301 to get the kW you need.
How much do solar panels cost in King of Prussia, PA?
At 3.60 dollars per watt, a 7.6 kW system costs about $27,360 before any state or utility incentives. There is no federal tax credit for systems installed in 2026.
How much sun does King of Prussia get?
King of Prussia averages 4.7 peak sun hours per day, so each kilowatt of panels produces about 1,301 kWh a year.
Does Pennsylvania have net metering?
Yes. Power sent back to the grid is credited at or near the retail price (21.0¢ per kWh on average).
How much does electricity cost in Pennsylvania?
Residential electricity in Pennsylvania averages 21.0¢ per kWh, and a typical home uses 817 kWh a month (EIA).
Solar payback in nearby places
- West Norriton12.0 yrs
- Wayne11.7 yrs
- Radnor11.7 yrs
- Norristown11.9 yrs
- East Norriton11.8 yrs
- Phoenixville11.8 yrs
- Broomall11.7 yrs
- Ardmore11.5 yrs