Data included
Annual average, monthly averages, and 12 x 24 profiles:
| GHI | Global horizontal irradiation |
| DIF | Diffuse horizontal irradiation |
| DNI | Direct normal irradiation |
| TEMP | Air temperature at 2m above ground |
| PVOUT | PV cSi yield |
| GTI | Global tilted irradiation |
Annual and monthly averages:
| WS | Wind speed m/s at 10 m above ground |
| RH | Relative humidity at 2m above ground |
| PWAT | Precipitable water |
| PREC | Precipitation (rainfall) |
| SNOWD | Snow days |
| ALB | Surface albedo |
| CDD | Cooling degree days |
| HDD | Heating degree days |
Additional map layers:
| ELE | Elevation |
| SLP | Slope |
| AZIM | Azimuth |
| POPUL | Population density |
| LANDC | Land cover |
| D2G | Ratio of diffuse to global irradiation |
| OPTA | Optimum tilt of PV modules |
| TLEO | Lowest expected operating temperature |
Other data:
- Horizon
- Sunpath
- Day length
- Solar zenith angle
Spatial resolution
Map layers:
| GHI, DIF, DNI, GTI | 9 arc-seconds, approx. 250m x 250m |
| PVOUT, TEMP, ALBEDO, HDD, CDD | 30 arc-seconds, approx. 1 km x 1 km |
| WS, WD, RH, PWAT, PRECIP, SNOWD | 2 arc-minutes, approx. 4 km x 4 km |
| Elevation, Slope, Azimuth | 3 arc-seconds, approx. 90m x 90m |
PV Calculation:
| GHI, DNI, PWAT, SNOW_DAYS | 2 arc-minutes, approx. 4 km x 4km |
| TEMP | 30 arc-seconds, approx. 1 km x 1 km |
| PVOUT, Horizon | 3 arc-seconds, approx. 90m x 90m |
Geographical and temporal coverage
The temporal coverage of Solargis irradiation data varies by region due to satellite imagery availability. With few exceptions, the coverage spans from the 1990s/2000s to the present time. Depending on the region, the long-term averages are calculated for a period from 1994/1999/2005/2007/2018 to 2022. Please, refer to the map above for specific start year.
The long-term averages of the other meteorological parameters are calculated for a period 1994-2022 globally.
Ground albedo data represents the long-term average for a period 2006-2015.