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Solar panels in Nashville, Tennessee
Nashville receives 4.31 peak sun hours a day and 1,573 kWh/m² of solar energy a year. That is measured satellite data for Nashville's coordinates, not a national average — and it changes the panel count.
Nashville solar data
4.31peak sun hours/day
1,573annual irradiance (kWh/m²)
1.42kWh/day from one 400 W panel
520kWh/year from one 400 W panel
Monthly solar irradiance in Nashville
| Month | Peak sun hours/day | Share of year |
|---|---|---|
| January | 1.79 | 0.1 |
| February | 3.41 | 0.3 |
| March | 4.34 | 0.4 |
| April | 5.12 | 0.4 |
| May | 5.31 | 0.4 |
| June | 6.51 | 0.5 |
| July | 5.94 | 0.5 |
| August | 6.26 | 0.5 |
| September | 4.33 | 0.4 |
| October | 4.40 | 0.4 |
| November | 2.21 | 0.2 |
| December | 1.94 | 0.2 |
Source: NASA POWER daily point API, parameter ALLSKY_SFC_SW_DWN (global horizontal irradiance), year 2024. Coordinates 36.1627, -86.7816.
How many solar panels does Nashville need?
For a typical US household using 900 kWh a month, Nashville needs about 22 panels of 400 W (8.43 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.