Solar Refrigeration Calculator

Size a solar-powered refrigeration system for off-grid vaccine storage, food preservation, or cold rooms.

Input Parameters

Results

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Heat Load
BTU/hr
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Compressor
W
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PV Array
W
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Daily Energy
kWh
Note: DC compressor refrigerators are 30-50% more efficient than AC equivalents. COP of 2.0-3.0 for solar refrigerators.

Reference

Surface Area = 6 x Volume^(2/3) [cube approximation] Heat Load = (Area x ΔT) / R-value x 1.3 safety Compressor W = (Heat Load / COP) x 0.293 BTU-to-W Daily Wh = Compressor x 0.6 duty cycle x 24 hrs PV = Daily Wh / (Sun Hrs x 0.80)