What the Marathon M4-D250SS costs to run
At 134 kWh/yr, the Marathon M4-D250SS's ENERGY STAR certification puts it one of the cheaper models in its category to run against every other certified refrigerator.
That $25 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
Efficient, or not, for a refrigerator
Against the category average of 386 kWh/yr, this model uses 65.3% less, ranking 71 of 4,704 refrigerators tracked here for running cost. That average is drawn from all 4,704 refrigerators ENERGY STAR currently certifies, not an outside number, a $47/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the Marathon M4-D250SS: Marathon M4-D250PANR ($25/yr, 134 kWh/yr), then Stirling S4-100PANR ($25/yr, 134 kWh/yr).
Same brand, different models
Ranked 12 of Marathon's 57 certified refrigerators, this sits between the M4-100BLS ($25/yr, the brand's cheapest) and the MFF208WFD-2 ($87/yr, its priciest).
What this adds up to over time
Over the 13-year service life NAHB reports for this category, running the Marathon M4-D250SS costs roughly $327 in electricity, separate from the purchase price.
Is it worth replacing?
Efficient as certified refrigerators go, $25/year is a reasonable baseline if you're comparing what else is on the market.
See what else is certified in this category before you decide.
If you're keeping it
$25/year to run is the predictable cost of the Marathon M4-D250SS; a protection plan covers the unpredictable one, a repair bill.
Where this number comes from
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Refrigerator category page shows all 4,704 refrigerators ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.