Spain: solar plant site data
Solar power plant in Vitoria-Gasteiz, Spain: yield, tilt angle and row spacing
Vitoria-Gasteiz: 1,274 kWh per kWp a year at the optimal tilt of 35°, 3° west of south (PVGIS). 21.2% below the median of the main cities of Spain (1,615). #136 of 147 main cities of Spain by yield. For comparison, Kyiv: 1,114 kWh/kWp — 14.3% more here.
Vitoria-Gasteiz is in the province of Álava, Basque Country. Population 257,407 (GeoNames). 547 m above sea level. 50 km away: Bilbao, the nearest bigger city, 1,171 kWh/kWp — 8.8% more here. 7.32 m between rows, pitch 11.24 m, GCR 0.43 (latitude 42.8°).
- Yield of 1 kWp
- 1,274kWh/year
- Tilt
- 35°3° west of south
- 10 kW
- 12,736kWh/year
- Row pitch
- 11.24m · GCR 0.43
- Rank in the country
- 136of 147 cities
Ground frame designer
A ground frame for a solar plant: Vitoria-Gasteiz
Latitude 42.8°: the tilt and the row pitch follow it. Enter the snow and wind for Spain in the designer, by the national annex to the Eurocode.
- No sign-up
- Snow and wind check
- Drawings and estimate
Yield by month
July: 146 kWh/kWp, December: 65 — 2.2 times less.
January: 67 against the median of 109 for the main cities of Spain, 38.5% less.
| kWp | A year | July | December |
|---|---|---|---|
| 5 | 6,368 | 730 | 325 |
| 10 | 12,736 | 1,460 | 650 |
| 15 | 19,104 | 2,190 | 975 |
Fixed tilt facing south
What a table yields at another tilt than the optimal 35° — for roofs and frames with a standard slope.
| Tilt | A year | Against the optimum |
|---|---|---|
| 35° (optimum) | 1,274 | — |
| 15° | 1,212 | −4.8% |
| 30° | 1,268 | −0.4% |
| 45° | 1,261 | −1.0% |
| 90° | 856 | −32.8% |
Snow and wind loads
Snow and wind loads for a site in Spain follow CTE DB SE-AE (Spain’s Código Técnico de la Edificación) and, where the Eurocodes are applied, UNE-EN 1991-1-3 and UNE-EN 1991-1-4 with the Spanish National Annex. Solispec computes loads by the Ukrainian DBN V.1.2-2 only, so this page shows no snow or wind values for Spain: enter the characteristic values from these documents in the designer’s «Own snow S0» and «Own wind W0» fields.
The frame calculation for such a site is preliminary: before installation it must be checked by an engineer who works to the country’s standards.
Nearby cities
Sources
- PVGIS © European Union, 2001–2026 — yield, tilt and azimuth, data as of 2026-10-10
- GeoNames (CC BY 4.0) — coordinates, elevation, population and divisions (changed)
- Where to take snow and wind loads from: CTE DB SE-AE
- How these numbers are computed
Preliminary calculation: a design needs an engineer’s check.