I’d assume that the outside freezer uses more energy in the summer, as it gets hotter outside than inside the house. So over the year it middles out.
In the winter I often cool down my cooked food outside before putting it in the fridge. But for long term storage you have to have a careful look at the weather forecast, as it could be -10° during a clear night but +10° the next day. In the summer I put my cooking pots in a water bath to cool them down quickly before putting them in the fridge.
I’d assume that the outside freezer uses more energy in the summer, as it gets hotter outside than inside the house. So over the year it middles out.
In the winter I often cool down my cooked food outside before putting it in the fridge. But for long term storage you have to have a careful look at the weather forecast, as it could be -10° during a clear night but +10° the next day. In the summer I put my cooking pots in a water bath to cool them down quickly before putting them in the fridge.