What is the best tilt angle for solar panels?

A simple yearly rule is to set solar panel tilt close to the site latitude. Winter tilt is usually steeper and summer tilt is usually flatter.

Should solar panel tilt equal latitude?

Latitude is a good starting point for fixed solar panels, but the best tilt depends on season, roof pitch, shading, energy goals and local weather.

Solar Tilt Angle Calculator | Best Panel Angle by Latitude & Season

Solar Tilt Angle Calculator

Find the recommended solar panel tilt angle for yearly, summer, winter or seasonal PV output using latitude, roof pitch and hemisphere.

☀️ Field Rule: For fixed solar panels, a good yearly starting point is usually close to your latitude. Use this with the Peak Sun Hours Calculator, Solar Panel Output Calculator, Solar Panel Area Calculator, and future tools like Solar Payback Calculator, Solar Combiner Box Calculator and Solar Shading Loss Calculator.

🏠 Roof Tilt + Sun Path → Better Solar Output

Latitude

Hemisphere

Optimization Target

Roof / Mounting Constraint

Existing Roof Tilt Optional

Minimum Practical Tilt

Maximum Practical Tilt

Panel Direction Note

Result Style

Tilt angle is measured from horizontal. In the Northern Hemisphere, panels usually face south. In the Southern Hemisphere, panels usually face north.

Presets:DubaiNew DelhiBerlinMadridNew YorkLos Angeles

Latitude

Roof Tilt

Roof Direction / Azimuth

Target Season

Allowed Tilt Difference

Mounting Option

This is a planning check, not an exact energy simulation. Roof direction, shading and local weather can matter more than a few degrees of tilt.

Latitude

Adjustment Style

Minimum Tilt

Maximum Tilt

📐 Formula Reference

Yearly Fixed Tilt

Recommended tilt ≈ latitude
Good simple starting point for fixed panels

Winter Tilt

Winter tilt ≈ latitude + 10° to 15°
Steeper panel catches lower sun

Summer Tilt

Summer tilt ≈ latitude - 10° to 15°
Flatter panel catches higher sun

Panel Direction

Northern Hemisphere: face south
Southern Hemisphere: face north

📋 Quick Reference

Common Rule

Year-roundlatitude

Winterlat + 15°

Summerlat - 15°

Practical Limits

Flat roofs10–15°

Self-cleaning10°+

Wind concernlower tilt

Still Check

Shadingcritical

Roof strengthrequired

Local rulesmust follow

📚 Engineering Notes

Latitude is a strong starting pointFor a fixed solar array, tilt near the site latitude is a simple and practical year-round recommendation.

Seasonal tilt changes output timingSteeper tilt improves winter collection; flatter tilt improves summer collection. The best choice depends on when energy is most valuable.

Estimate output after tilt planningUse the Solar Panel Output Calculator and Peak Sun Hours Calculator after selecting a practical tilt.

Check layout and shadingUse the Solar Panel Area Calculator and future Solar Shading Loss Calculator for practical rooftop planning.

What is a Solar Tilt Angle Calculator?

A solar tilt angle calculator estimates the best panel angle from horizontal for fixed PV panels. It uses latitude and season to suggest year-round, winter and summer tilt settings.

Best angle for solar panels by latitude

A common simple rule is to set the yearly fixed tilt close to the site latitude. For winter, increase the tilt by around 10° to 15°. For summer, reduce the tilt by around 10° to 15°. This tool applies those practical rules and clamps the result to useful mounting limits.

Solar planning workflow

After tilt selection, use the Solar Panel Output Calculator to estimate kWh output, the Peak Sun Hours Calculator for solar resource, the Solar Panel Area Calculator for roof space, and the Solar kWh to Panel Count Calculator for panel quantity.

Important limitations

This is a practical planning calculator, not a full irradiance simulation. Exact output depends on local weather, azimuth, shading, roof pitch, panel temperature, soiling and installation constraints.

❓ Frequently Asked Questions

For fixed year-round solar panels, latitude is a good starting point. The best tilt can change depending on season, roof angle, shading and energy target.

A common winter rule is latitude plus about 10° to 15°, because the sun is lower in the sky.

In the Northern Hemisphere panels usually face south. In the Southern Hemisphere panels usually face north. East-west layouts can be used for flatter daily production.