Where does the yield data come from?

From PVGIS, the photovoltaic geographical information system of the European Commission Joint Research Centre. It combines satellite irradiation data with your location, tilt and direction.

What system loss is assumed?

We use the PVGIS default of 14 percent for cabling, inverter, soiling and temperature effects. Shading from trees or buildings is not included.

Why is my roof direction less important than expected?

East and west roofs lose only a modest share of the annual total and spread production across the day, which often raises self-consumption.

Solar yield calculator

Enter your location, roof direction and tilt. The calculation uses PVGIS from the European Commission Joint Research Centre, so the yield is location specific rather than a generic factor.

Data set

These are reference values for Europe. Our country sites carry verified local data: myosolar.de, myosolar.at, myosolar.ch, myosolar.it, myosolar.es, myosolar.fr

Your inputs

Postcode or city

System size

kWp

Roof tilt30°

Roof direction

PVGIS was not reachable, so this result uses the market average yield and is an estimate rather than a location specific calculation.

Result

Annual production8,800 kWh

around 24.1 kWh on an average day

Specific yield1,100 kWh/kWp

Monthly production

Best month Jul with 1,144 kWh, weakest month Jan with 282 kWh.

Show the result as a table

Monthly production
Month	Production in kWh
Jan	282
Feb	422
Mar	722
Apr	950
May	1,082
Jun	1,109
Jul	1,144
Aug	1,021
Sep	792
Oct	537
Nov	422
Dec	317

Your inputs are kept in the address of this page, so you can bookmark or share this result.

Assumptions and sources

The market data behind the calculation above, with source, date and quality, followed by the modelling assumptions the result depends on.

Market data with sources

Specific yield1,100 kWh/kWp
reference valuemyosolar working assumption, not a quotation2026-08-01
Illustrative only. Never print in an article. Use the market specific constant instead.

Rules that apply in your market

These figures are European reference values, not the rules of a single country. Our country sites carry verified local data.

Frequently asked questions

Where does the yield data come from?: From PVGIS, the photovoltaic geographical information system of the European Commission Joint Research Centre. It combines satellite irradiation data with your location, tilt and direction.
What system loss is assumed?: We use the PVGIS default of 14 percent for cabling, inverter, soiling and temperature effects. Shading from trees or buildings is not included.
Why is my roof direction less important than expected?: East and west roofs lose only a modest share of the annual total and spread production across the day, which often raises self-consumption.

Matching guides

This is a transparent model for orientation, not an offer, not a yield guarantee and not financial advice. Binding figures need a site survey.