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You'll find that nobody really uses 3 way or absorption fridges any longer, DC compressor based ones are far more efficient and rule the market now.
Check out the ones sold by Waeco, IndelB and others. Mine uses as little as 0.1kWh per day and can cool down to -20C if required. I can run it from a solar panel in a van even in winter here in Ireland.
There are also control boards available for those DC compressors to run directly from a solar panel with no battery or charge controller at all.
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