Running cost for the Sub-Zero ID-24R*
ENERGY STAR certifies the Sub-Zero ID-24R* at 213 kWh/yr, one of the cheaper models in its category to run for its category.
That $40 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 44.8% less, ranking 526 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 $33/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 ID-24R*: Seasons MSCM24** ($40/yr, 213 kWh/yr), then Sunbeam SGR25M**E ($40/yr, 213 kWh/yr).
Within the Sub-Zero lineup
Ranked 5 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).
Sub-Zero ID-24R* over 13 years
13 years is NAHB's typical service life for this category; at $40/year, the Sub-Zero ID-24R* adds up to about $521 in electricity over that span.
Weighing a replacement
Efficient as certified refrigerators go, $40/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified refrigerators before buying.
If you're keeping it
The Sub-Zero ID-24R* already costs $40/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
Where this number comes from
Ranked 526 of 4,704, the Sub-Zero ID-24R* 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. The 213 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.