Calculator › Richmond, Virginia
Solar panels in Richmond, Virginia
Richmond receives 4.29 peak sun hours a day and 1,566 kWh/m² of solar energy a year. That is measured satellite data for Richmond's coordinates, not a national average — and it changes the panel count.
Richmond solar data
4.29peak sun hours/day
1,566annual irradiance (kWh/m²)
1.42kWh/day from one 400 W panel
517kWh/year from one 400 W panel
Monthly solar irradiance in Richmond
| Month | Peak sun hours/day | Share of year |
|---|---|---|
| January | 2.19 | 0.2 |
| February | 3.20 | 0.3 |
| March | 4.17 | 0.3 |
| April | 4.99 | 0.4 |
| May | 5.48 | 0.5 |
| June | 6.93 | 0.6 |
| July | 5.82 | 0.5 |
| August | 5.48 | 0.5 |
| September | 4.03 | 0.3 |
| October | 4.16 | 0.3 |
| November | 2.67 | 0.2 |
| December | 2.21 | 0.2 |
Source: NASA POWER daily point API, parameter ALLSKY_SFC_SW_DWN (global horizontal irradiance), year 2024. Coordinates 37.5407, -77.436.
How many solar panels does Richmond need?
For a typical US household using 900 kWh a month, Richmond needs about 22 panels of 400 W (8.47 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.