What the Marathon MAR110BLS costs to run
The Marathon MAR110BLS is certified by ENERGY STAR at 240 kWh a year, one of the cheaper models in its category to run among refrigerators currently certified.
That $45 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 37.8% less, ranking 978 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 $27/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 MAR110BLS: XO XOU2470WGS* ($45/yr, 238 kWh/yr), then Marathon MAR110W ($45/yr, 240 kWh/yr).
Within the Marathon lineup
Ranked 16 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).
Marathon MAR110BLS over 13 years
NAHB's Study of Life Expectancy of Home Components puts a typical refrigerator's service life at 13 years; run the Marathon MAR110BLS that long and it costs about $587 in electricity, on top of whatever it cost to buy.
Weighing a replacement
Efficient as certified refrigerators go, $45/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
Whether or not the Marathon MAR110BLS ever needs replacing, a repair is the more common failure for a refrigerator, one a protection plan budgets for ahead of time.
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. At rank 978 of 4,704 for running cost, see the refrigerator category page for the rest of the field, or the guide to how much your state matters.