Running cost for the Marathon MFF115SSBM
The Marathon MFF115SSBM is certified by ENERGY STAR at 397 kWh a year, about average for its category to run among refrigerators currently certified.
That $75 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
The category average is 386 kWh/yr; this model runs 2.8% above it, ranking 2,915 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 $2/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 MFF115SSBM: Marathon MFF115***** ($75/yr, 397 kWh/yr), then Marathon MFF115WBM ($75/yr, 397 kWh/yr).
Same brand, different models
Ranked 38 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).
Cost over its typical lifespan
13 years is NAHB's typical service life for this category; at $75/year, the Marathon MFF115SSBM adds up to about $970 in electricity over that span.
Weighing a replacement
Efficient as certified refrigerators go, $75/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
A refrigerator like the Marathon MFF115SSBM is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
Where this number comes from
Nothing here is estimated from a nameplate wattage; the 397 kWh/yr is ENERGY STAR's own certified figure for this model. Ranked 2,915 of 4,704, the Marathon MFF115SSBM sits in the middle of the refrigerator category, see the guide to why your state changes this number for the other half of the math.