The sun moves north and south across the year
In summer the sun is high overhead. In winter it stays low. This tool tracks where the sun is each month so it can point your panels in the right direction.
Solar panel guide for the rest of us
Get more power from your solar panels.
Just move the slider to your city or latitude and this tool tells you the best angle to tilt your solar panels. No engineering background needed — the numbers tell you exactly what to do.
Latitude input
Not sure? See latitudes for common cities or click Use my location below.
Browse cities by latitude 22 cities
| City | Country | Latitude |
|---|---|---|
| Riyadh | Saudi Arabia | 24.6 |
| Dubai | UAE | 25.2 |
| Kuwait City | Kuwait | 29.4 |
| Doha | Qatar | 25.3 |
| Muscat | Oman | 23.6 |
| Abu Dhabi | UAE | 24.5 |
| Cairo | Egypt | 30.0 |
| Istanbul | Turkey | 41.0 |
| London | UK | 51.5 |
| New York | USA | 40.7 |
| Los Angeles | USA | 34.1 |
| Tokyo | Japan | 35.7 |
| Beijing | China | 39.9 |
| Mumbai | India | 19.1 |
| Sydney | Australia | -33.9 |
| Singapore | Singapore | 1.3 |
| Berlin | Germany | 52.5 |
| Paris | France | 48.9 |
| Rome | Italy | 41.9 |
| Madrid | Spain | 40.4 |
| Moscow | Russia | 55.8 |
| Bangkok | Thailand | 13.8 |
Your results, explained simply.
These numbers tell you exactly how to angle your panels.
Set once, year-round angle
__°
Best for low winter sun
__°
Best for high summer sun
__°
Extra power vs flat on ground
__%
What this means: A set-it-and-forget panel angled at your "year-round angle" always makes more power than laying it flat on the ground. If you can adjust it twice a year, the winter and summer angles give you even more. The "Extra power" number tells you how much more electricity you get compared to flat panels.
How much power you get each month.
The chart shows tilted panels (green) always beat flat panels (orange).
Horizontal
Optimal tilt
See the green bars? They are always taller than the orange bars. That means tilting your panels gives you more power every single month of the year.
How it works.
Three ideas that explain why angle matters.
Your location changes how high the sun gets
If you live near the equator the sun is almost overhead year-round. Farther north or south the sun stays lower — so your panels need a steeper angle.
Angling the panel captures more direct sunlight
When a panel points straight at the sun it collects more energy. This tool finds the angle that faces the sun best across the whole year.
Technical details.
Assumptions and methods behind the numbers.
What should I do with these numbers?
- Fixed mount (most common): Set your panels at the "year-round angle" and never touch them. This gives you the best overall performance without adjustments.
- Adjustable mount: If you can change the angle twice a year, use "winter angle" from October to March and "summer angle" from April to September.
- Flat roof: These angles are measured from horizontal (the ground). A 24° tilt means your panel is tilted 24° up from flat.
A note on real-world conditions
This tool uses the sun's position to calculate the best angle. In real life, local weather, clouds, shading from trees or buildings, and dust on panels also affect how much power you get. Use this as a starting point, then fine-tune based on your actual setup.