What the Sub-Zero DEC3050R**/* costs to run
The Sub-Zero DEC3050R**/* is certified by ENERGY STAR at 332 kWh a year, cheaper than most models in its category to run among refrigerators currently certified.
That $62 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 14% less, ranking 2,196 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 $10/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 Sub-Zero DEC3050R**/*: Monogram ZIR301NPP**** ($62/yr, 332 kWh/yr), then Summit CTR151W ($62/yr, 332 kWh/yr).
Comparing Sub-Zero's own models
Ranked 13 of Sub-Zero's 26 certified refrigerators, this sits between the DEU2450R/ADA/* ($30/yr, the brand's cheapest) and the CL4850S/S/* ($140/yr, its priciest).
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical refrigerator's service life at 13 years; run the Sub-Zero DEC3050R**/* that long and it costs about $811 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified refrigerators go, $62/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 Sub-Zero DEC3050R**/* 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
At rank 2,196 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. The 332 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.