What the Marathon MCF51W-1 costs to run
The Marathon MCF51W-1 is certified by ENERGY STAR at 195 kWh a year, one of the cheaper models in its category to run among freezers currently certified.
The $37 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Marathon MCF51W-1 against the category
That's 51.4% below the freezer category average of 401 kWh/yr, and ranks 17 of 658 certified freezers for annual running cost, 1 being cheapest. The category average comes from every freezer ENERGY STAR currently certifies (658 models), not an outside benchmark, about $39/year below that average at the national rate. See the methodology page.
What sits beside it in the ranking
Arctic King AC05ESWCR1RCM ($37/yr, 196 kWh/yr) costs a little more to run than the Marathon MCF51W-1. Danby DCF050A5WDB ($37/yr, 195 kWh/yr) costs a little less.
Within the Marathon lineup
Marathon makes 11 ENERGY STAR certified freezers; this one ranks 4 of 11 for running cost, between the brand's cheapest, the MCF36W-1 at $31/yr, and its priciest, the MFF212BLS at $93/yr.
Lifespan
NAHB's Study of Life Expectancy of Home Components does not publish a figure for freezers, so no lifetime cost is shown here rather than a guessed one. The annual and monthly figures above stand on their own.
Is it worth replacing?
The Marathon MCF51W-1 is already efficient for its category at $37/year. If you're shopping and comparing options, this is roughly what a well-chosen new freezer costs to run.
Worth comparing a few current certified models before deciding.
Protecting what you have
The Marathon MCF51W-1 already costs $37/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
Sourcing
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Freezer category page shows all 658 freezers ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.