Calculator › Milwaukee, Wisconsin
Solar panels in Milwaukee, Wisconsin
Milwaukee receives 3.81 peak sun hours a day and 1,391 kWh/m² of solar energy a year. That is measured satellite data for Milwaukee's coordinates, not a national average — and it changes the panel count.
Milwaukee solar data
3.81peak sun hours/day
1,391annual irradiance (kWh/m²)
1.26kWh/day from one 400 W panel
459kWh/year from one 400 W panel
Monthly solar irradiance in Milwaukee
| Month | Peak sun hours/day | Share of year |
|---|---|---|
| January | 1.17 | 0.1 |
| February | 2.73 | 0.2 |
| March | 3.51 | 0.3 |
| April | 4.79 | 0.4 |
| May | 5.81 | 0.5 |
| June | 5.86 | 0.5 |
| July | 6.00 | 0.5 |
| August | 5.04 | 0.4 |
| September | 4.70 | 0.4 |
| October | 3.42 | 0.3 |
| November | 1.49 | 0.1 |
| December | 1.07 | 0.1 |
Source: NASA POWER daily point API, parameter ALLSKY_SFC_SW_DWN (global horizontal irradiance), year 2024. Coordinates 43.0389, -87.9065.
How many solar panels does Milwaukee need?
For a typical US household using 900 kWh a month, Milwaukee needs about 24 panels of 400 W (9.54 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.