Solar Sizing Calculator
Solar Calculator for Refrigerators & Freezers
Works with SunDanzer models or any other brand. Find the solar panels, battery and charge controller you need, check how long your current system will run, and see how much smaller your system could be with a SunDanzer.
1 · Your refrigeration
2 · Your site
Approximate peak sun hours for a south-facing panel tilted at latitude. For exact figures use PVWatts from the National Laboratory of the Rockies.
Add up the watt rating of all your panels.
Total amp-hours at your 12 V system voltage.
Advanced settings
Days of autonomy is how many days your battery can run your refrigerator with no solar charging at all, such as during cloudy or stormy weather, starting from a full charge and stopping at your chosen depth of discharge.
30% recommended for food loads. Covers hot rooms, frequent door openings and warm food added to the unit.
Recommended system
Daily energy
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Solar array
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Battery bank
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Charge controller
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How we calculated this
Estimates only. Energy use is from SunDanzer’s 2026 catalog, measured at 32 °C (90 °F) ambient. Actual needs depend on climate, installation, shading and usage; customers should do their own analysis or email us at info@sundanzer.com.