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    Solar panel angle tool

    Solar panel tilt angle calculator

    Enter a city or latitude to calculate a practical fixed panel angle, seasonal adjustment angles, and the direction your panels should face. Use the detailed model for PVWatts-backed production comparisons from NLR by location.

    Build a roof estimateEstimate production
    Quick calculator
    Find your panel angle
    Works for any latitude. Curated cities unlock detailed production models.

    The dropdown is intentionally curated for detailed pages. The latitude field gives a quick global tilt estimate anywhere.

    Best fixed tilt

    41°facing south

    Hemisphere

    Northern

    Summer

    26°

    Spring/autumn

    41°

    Winter

    56°

    Add your current roof pitch to see how close it is to the fixed recommendation.

    Run a detailed model for a city

    The quick calculator gives a practical tilt rule. The city pages compare production at multiple tilts and estimate the gain from adjusting panels during the year.

    South Africa

    Cape Town

    Latitude -33.9°. Detailed fixed, seasonal, and monthly tilt analysis.

    South Africa

    Durban

    Latitude -29.9°. Detailed fixed, seasonal, and monthly tilt analysis.

    South Africa

    Johannesburg

    Latitude -26.1°. Detailed fixed, seasonal, and monthly tilt analysis.

    USA

    New York

    Latitude 40.7°. Detailed fixed, seasonal, and monthly tilt analysis.

    USA

    Los Angeles

    Latitude 34.1°. Detailed fixed, seasonal, and monthly tilt analysis.

    UK

    London

    Latitude 51.5°. Detailed fixed, seasonal, and monthly tilt analysis.

    Browse all city tilt calculators

    Choose a city if you want the full production-backed tilt model rather than the quick latitude estimate.

    Africa

    17 locations

    Asia

    17 locations

    Australia

    5 locations

    Europe

    19 locations

    North America

    17 locations

    South America

    9 locations

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    Optimal solar panel tilt angle calculator for all locations | Size.Solar