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Solar panels in Pittsburgh, Pennsylvania
Pittsburgh receives 3.91 peak sun hours a day and 1,428 kWh/m² of solar energy a year. That is measured satellite data for Pittsburgh's coordinates, not a national average — and it changes the panel count.
Pittsburgh solar data
3.91peak sun hours/day
1,428annual irradiance (kWh/m²)
1.29kWh/day from one 400 W panel
471kWh/year from one 400 W panel
Monthly solar irradiance in Pittsburgh
| Month | Peak sun hours/day | Share of year |
|---|---|---|
| January | 1.32 | 0.1 |
| February | 3.02 | 0.3 |
| March | 3.74 | 0.3 |
| April | 4.34 | 0.4 |
| May | 5.46 | 0.5 |
| June | 6.27 | 0.5 |
| July | 6.13 | 0.5 |
| August | 5.14 | 0.4 |
| September | 4.38 | 0.4 |
| October | 3.68 | 0.3 |
| November | 1.89 | 0.2 |
| December | 1.44 | 0.1 |
Source: NASA POWER daily point API, parameter ALLSKY_SFC_SW_DWN (global horizontal irradiance), year 2024. Coordinates 40.4406, -79.9959.
How many solar panels does Pittsburgh need?
For a typical US household using 900 kWh a month, Pittsburgh needs about 24 panels of 400 W (9.29 kWp), with a south-facing roof. That is more panels than the same household would need in a city with 4.5 peak sun hours.