Solar Still Calculator

Calculate freshwater production from a solar still (basin type) based on solar radiation and still design.

Input Parameters

Results

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Daily Output
liters
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Still Efficiency
%
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Energy per Liter
kWh/L
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Monthly Output
liters
Note: Simple basin solar stills produce 3-5 L/m²/day. Shallow water depth (1-2 cm) improves output. Multi-effect stills can double production.

Reference

Efficiency = Base (35%) x Depth Factor x Angle Factor Depth Factor = 1 - Depth(cm) x 0.05 (shallower = better) Daily Output = Area x Radiation x Eff / Latent Heat Latent Heat of Vaporization = 0.628 kWh/L Optimal glass angle: 20-30°