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Freezer power saving overnight.

hertzal123
Just read on another forum about a device that switches off domestic freezers for short periods overnight to save

power.Just wondered if this is worthwhile in a domestic setting.

                                                                                    Regards,

                                                                                                   Hz
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  • 0
    Sounds like snake oil to me.

    Freezers are controlled thermostatically. If the supply is turned off when the thermostat has already turned off the compressor, then utterly pointless. If this external device turns of the supply when the compressor is running, then on restoration of the supply, the compressor will run for longer to "make up for lost times" and no saving will result.

    If the supply is turned for several hours, then a slight saving will result, but only by raising the average temperature within the freezer. This might have serious implications for food safety. If you consider a slightly less cold storage temperature IS acceptable, then simply set the existing thermostatic control to a slightly less cold setting.


    If an off peak tariff is available, then a slight money saving may be achieved by turning off a freezer for say the last hour or the last two hours of the full price hours. The freezer will then run for longer during the off peak hours. So doing wont save ENERGY but will save MONEY by transferring a little of energy use into the off peak hours.
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  • 0
    Sounds like snake oil to me.

    Freezers are controlled thermostatically. If the supply is turned off when the thermostat has already turned off the compressor, then utterly pointless. If this external device turns of the supply when the compressor is running, then on restoration of the supply, the compressor will run for longer to "make up for lost times" and no saving will result.

    If the supply is turned for several hours, then a slight saving will result, but only by raising the average temperature within the freezer. This might have serious implications for food safety. If you consider a slightly less cold storage temperature IS acceptable, then simply set the existing thermostatic control to a slightly less cold setting.


    If an off peak tariff is available, then a slight money saving may be achieved by turning off a freezer for say the last hour or the last two hours of the full price hours. The freezer will then run for longer during the off peak hours. So doing wont save ENERGY but will save MONEY by transferring a little of energy use into the off peak hours.
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