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Solar panels in Jacksonville, Florida
Jacksonville receives 4.81 peak sun hours a day and 1,754 kWh/m² of solar energy a year. That is measured satellite data for Jacksonville's coordinates, not a national average — and it changes the panel count.
Jacksonville solar data
4.81peak sun hours/day
1,754annual irradiance (kWh/m²)
1.59kWh/day from one 400 W panel
580kWh/year from one 400 W panel
Monthly solar irradiance in Jacksonville
| Month | Peak sun hours/day | Share of year |
|---|---|---|
| January | 2.92 | 0.2 |
| February | 3.96 | 0.3 |
| March | 4.67 | 0.4 |
| April | 6.43 | 0.5 |
| May | 6.42 | 0.5 |
| June | 6.75 | 0.6 |
| July | 6.27 | 0.5 |
| August | 5.59 | 0.5 |
| September | 4.08 | 0.3 |
| October | 4.23 | 0.4 |
| November | 3.37 | 0.3 |
| December | 2.80 | 0.2 |
Source: NASA POWER daily point API, parameter ALLSKY_SFC_SW_DWN (global horizontal irradiance), year 2024. Coordinates 30.3322, -81.6557.
How many solar panels does Jacksonville need?
For a typical US household using 900 kWh a month, Jacksonville needs about 19 panels of 400 W (7.55 kWp), with a south-facing roof. That is fewer panels than the same household would need in a city with 4.5 peak sun hours.