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Technology & equipment 2 min read

Solar Panel Tilt and Orientation in Egypt: Getting the Most Output

What is the best panel tilt in Cairo, Aswan and Alexandria, and is facing south essential? A practical guide to tilt, orientation and spacing.

GPS Engineering Team
Solar Panel Tilt and Orientation in Egypt: Getting the Most Output

The direction your panels face and their tilt determine how much light they collect all year. A small design error can cost noticeable output for 25 years; smart design balances yield against space.

Key takeaways

  • The ideal orientation in Egypt is true south.
  • The optimal annual tilt is close to latitude minus a few degrees: roughly 20–28°.
  • Commercial roofs often use lower tilts (10–15°) to fit more panels.
  • East–west layouts are excellent when space is limited.

Optimal tilt by city

City Approx. latitude Approx. optimal annual tilt
Aswan 24° 20°–22°
Luxor 25.7° 22°–24°
Hurghada 27.3° 23°–25°
Cairo 30° 25°–27°
Alexandria 31.2° 26°–28°
Southbest orientation in Egypt
20°–28°approx. optimal annual tilt range
3–5%approx. loss only at 10–15° tilt, in exchange for higher density

Why not always use the “optimal” angle?

Steeper tilts cast longer shadows on the row behind, so rows must be spaced further apart — meaning fewer panels on the same roof. On commercial and industrial roofs we often use a lower tilt that fits more panels, so total output is higher even if each panel produces a little less.

East–west layouts

Rows facing each other with a shallow tilt to the east and west:

  • Fill the roof at high density.
  • Spread production across the day (morning and afternoon), which suits self-consumption.
  • Reduce wind loads.

Dust and tilt

Steeper tilts help dust slide off, while very shallow tilts (under 10°) need more frequent cleaning. Read cleaning panels in desert conditions and space requirements for solar.

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GPS Engineering Team

GPS engineers have designed and built solar plants across Egypt for 15+ years. Here they share what they learn in the field.

Frequently asked questions

Can panels face north?

In Egypt a northern orientation noticeably reduces output and is only advised at very low tilt when there is no alternative.

Should I change the tilt between summer and winter?

Possible with adjustable frames, but the gain is small for the effort, so we usually design a fixed, annually optimal tilt.

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