What the Smeg CB300U costs to run
At 387 kWh/yr, the Smeg CB300U's ENERGY STAR certification puts it about average for its category to run against every other certified refrigerator.
That $73 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 0.3% above it, ranking 2,815 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 $0/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 Smeg CB300U: LG LTCS20020* ($73/yr, 387 kWh/yr), then Bosch B09IB91NS* ($73/yr, 388 kWh/yr).
Same brand, different models
Ranked 6 of Smeg's 16 certified refrigerators, this sits between the SBIWU320XE ($19/yr, the brand's cheapest) and the FTU171X7 ($128/yr, its priciest).
Smeg CB300U over 13 years
Over the 13-year service life NAHB reports for this category, running the Smeg CB300U costs roughly $946 in electricity, separate from the purchase price.
Is it worth replacing?
Efficient as certified refrigerators go, $73/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
A refrigerator like the Smeg CB300U 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 387 kWh/yr is ENERGY STAR's own certified figure for this model. Ranked 2,815 of 4,704, the Smeg CB300U 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.