A modern 150W fridge at 40 percent duty cycle uses about 1.4 kWh daily, near $90 a year at average rates.

Compressors cycle on and off. A fridge runs roughly a third of the time; a freezer in a hot garage runs far more.

Old second fridges draw 100 to 200W continuously, $150 to $300 a year. Retiring one often beats a year of groceries.

Clean coils yearly, keep 37 to 40 F, seal gaps, and let food cool before storing.