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Panels, roof and production

Monthly solar production calculator CEG

Estimate local solar yield with PVGIS, location, slope and orientation. Monthly and annual results to keep in your CEG report.

Want battery sizing and difficult months too? Open the guided journey →

View or enter coordinates (including outside Italy)

Latitude is the north/south position; longitude is east/west. Search results locate the place, not your house. You may enter the actual roof coordinates instead.

Search runs on your device. Approximate coordinates: GeoNames, CC BY 4.0. Data: 29 Sep 2026. Confirm the place before calculating.

Example: 10 panels × 430 Wp = 4.3 kWp.
0° = horizontal. The starting 30° is an editable example.
Losses and ventilation
Same parameter as the roof calculator. This does not model storage.

Potential production before storage and demand constraints. PVGIS includes historical climate and terrain horizon, not nearby trees or chimneys. Location and technical inputs are sent to PVGIS, without name or email.

Method and limitations

PVGIS 5.3 PVcalc: the same model as the roof tool and potential production in the guided journey. Regional averages never silently replace local data. Actual yield varies each year. Off-grid design also needs hourly demand and battery modelling.