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Solar Panel Optimal Tilt Angle Calculator

Year-round tilt ≈ latitude; seasonal adjustments included.

Recommends optimal fixed solar panel tilt angle from site latitude, with winter and summer seasonal tilt adjustments for maximum annual yield.

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Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Fixed tilt ≈ |latitude|; Winter ≈ latitude + 15°; Summer ≈ latitude − 15°

In depth

Recommends optimal fixed solar panel tilt angle from site latitude, with winter and summer seasonal tilt adjustments for maximum annual yield.