Solar Yield Calculator by Postal Code (EU-PVGIS SARAH3)
Enter your postal code (DE, AT, CH), roof azimuth, and pitch to inspect specific yield (kWh/kWp) and summer vs. winter production.
Formula: Location-Specific Solar Yield via EU-PVGIS (SARAH3)
Annual Solar Yield (kWh) = Installed Peak Power (kWp) × Specific Location Yield (kWh/kWp from PVGIS-SARAH3) × Orientation/Tilt FactorOur calculator queries the official European Commission Joint Research Centre (JRC) PVGIS v5.3 API with the PVGIS-SARAH3 satellite radiation database and a realistic 14% system loss allowance.
Worked Example: 10 kWp South vs. East-West Roof
At 30° tilt facing South (0° azimuth), a 10 kWp system in Munich, Vienna, or Zurich produces ~10,800 to 11,300 kWh per year (~71% in April–September, ~29% in October–March). An East-West roof produces ~83%–85% of the South peak (~9,100 kWh) with broader morning and evening coverage.
How to Calculate Monthly & Annual Solar Yield by Postal Code
Check exact kWh/kWp output and 12-month solar generation curves for any postal code in Germany, Austria, and Switzerland.
- 1. Enter Postal Code (DE, AT, or CH): Input your postal code to resolve exact latitude and longitude for EU-PVGIS.
- 2. Select Roof Orientation & Tilt Angle: Choose South, South-East/West, East-West, or North and set roof pitch in degrees.
- 3. Set System Size in kWp: Specify your planned solar array size.
- 4. Inspect Monthly Bar Chart & Winter Share: Compare summer half-year vs. winter half-year electricity generation.
Relative Solar Yield (%) by Roof Orientation & Tilt Angle in Central Europe
| Roof Azimuth | 10° Tilt (Flat) | 30° Tilt (Optimal) | 45° Tilt (Steep) | 60° Tilt |
|---|---|---|---|---|
| South (0°) | 93% | 100% (950–1,150 kWh/kWp) | 97% | 90% |
| South-East / South-West (±45°) | 91% | 95% (900–1,090 kWh/kWp) | 92% | 85% |
| East / West (±90°) | 87% | 83% (790–950 kWh/kWp) | 78% | 70% |
| North (+180°) | 80% | 63% (600–720 kWh/kWp) | 50% | 38% |
Source: EU JRC PVGIS v5.3 (PVGIS-SARAH3, 14% system losses).
Frequently Asked Questions (FAQ): Solar Yield Calculator (PVGIS)
How many kWh does 1 kWp of solar panels produce per year?
In Central Europe (Germany, Austria, Switzerland), 1 kWp of unshaded south-facing solar panels produces between 900 kWh (Northern Germany) and 1,160 kWh (Southern Germany, Austria, Swiss Plateau) per year, and over 1,250 kWh in Alpine regions.
Related Calculators & Formula Documentation
Calculate location-specific solar PV output (kWh/kWp) and monthly summer/winter production via EU-PVGIS.