Any company can embed this solar panel azimuth-angle calculator on its own website, free of charge, as a simplified version for their clients. Generate a ready-to-use, branded embed code right on this page (section 2 below). For companies that prepare quotes and sell installations professionally, we recommend the full EasySolar platform at web.easysolar-app.com.

Table of Contents

1. Try the calculator
2. Add this calculator to your website
3. How the calculation works
4. What to pay attention to
5. Example calculation
6. Simplified vs. full version

2. Add this calculator to your website

Installers and distributors are welcome to embed the solar panel azimuth-angle calculator on their own pages, free of charge. Pick your market's language and enter your company name below; the embed code is generated automatically, ready to copy into your site.

Condition of use: embedding this calculator is permitted only if the built-in EasySolar attribution footer (the "Kalkulator tworzony przez EasySolar AI…" section with the EasySolar AI logo and link) stays visible and unmodified. Do not hide it with CSS, crop it out of the iframe, or edit its text or link. Removing or altering it revokes permission to use the calculator on your site.

Generate your embed code

3. How the calculation works

The solar panel azimuth-angle calculator maps your panel's setting to a yield coefficient. Two inputs drive it: the azimuth (which way the panel faces) and the tilt angle (how steep it is). Four steps run every time you move the panel or a slider:

1. Deviation from the optimum. The calculator computes how far the panel points away from the sun-facing direction: south on the northern hemisphere, north on the southern (e.g. Brazil). A panel aimed straight at that direction has a deviation of 0°.
2. Coefficient from a PVGIS table. The deviation and the tilt index into a table of annual yields taken from PVGIS (the EU Joint Research Centre's irradiation database, SARAH2) for a representative location of your market. Values between the grid points are read with bilinear interpolation.
3. Yield vs. optimum (%). The table is normalised so the best possible setting equals 100%. The big percentage on the panel is your annual yield relative to that optimum; the battery tile and the face dimming reflect the same number.
4. Production per kWp. Multiplying the percentage by the market's optimum specific yield gives the annual energy in kWh/kWp; the power field scales it to any installation size.

4. What to pay attention to

• It is an annual average. "Sun in the south" is a mental model for the direction of maximum yield over the whole year, not the sun's position at a given moment.
• East–West symmetry. The calculator treats east and west deviations the same; real installations can differ by a few percent (climate, morning temperature).
• Shading and face dimming are illustrative, tuned for readability, not a photometric ray-trace.
• Irradiation data is market-representative (PVGIS for a typical location: Poland for Central Europe, Sweden, Spain for the south, Brazil for the southern hemisphere), not your exact roof.
• This is a simplified estimate, not an offer. Confirm the real design in EasySolar.

5. Example calculation

For a Central-European location (Warsaw, PVGIS-SARAH2), at a fixed 35° tilt, the yield relative to the optimum is:

So turning a panel from south to east/west costs about a fifth of the yield; facing it north nearly halves it. The best setting for this market is roughly south, ~40° tilt (≈ 1 048 kWh per kWp per year, the 100% reference). Switch the widget to ?lang=pt-BR to see the southern-hemisphere case, where the optimum points north.

6. Simplified vs. full version

The calculator on this page is a simplified, illustrative model: it uses an average irradiation table for a whole market and treats east and west alike. It is built to give you an intuition for how orientation affects yield, not a final quote.

The full version is EasySolar, available after registration at web.easysolar-app.com. It designs the actual installation:

• PV layout on satellite and drone imagery of the real roof, with shading analysis,
• irradiation and the true azimuth/tilt for the exact address, not a market average,
• real equipment: panels, inverters and storage from manufacturer databases,
• financial analysis with local tariffs and financing,
• and a complete interactive offer you can send to your client in minutes.

Create a free EasySolar account and turn this estimate into a real offer →