Flush Mount Spacing Calculator

Calculate minimum gap between flush-mounted modules to allow thermal expansion and cooling airflow.

Input Parameters

Results

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Length Expansion
mm
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Width Expansion
mm
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Min Length Gap
mm
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Min Width Gap
mm
Note: Flush-mount gaps also provide rear ventilation that reduces module temperature 2-5°C, improving energy yield by 1-2%. Typical gaps are 10-25 mm.

Reference

ΔL = L × α × ΔT α = CTE (aluminum ≈ 23×10⁻⁶/°C) ΔT = max temperature range Min Gap = ΔL × Safety Factor (2.0) Minimum practical gap: 10 mm (≈ 3/8 in)