What the Insignia NS-CF30TMSS6-C costs to run
The Insignia NS-CF30TMSS6-C is certified by ENERGY STAR at 273 kWh a year, one of the cheaper models in its category to run among refrigerators currently certified.
That $51 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 29.3% less, ranking 1,498 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 $21/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 Insignia NS-CF30TMSS6-C: Arctic Wind AUFW210ETH-LK ($51/yr, 273 kWh/yr), then L2 LRU21B6A** ($51/yr, 273 kWh/yr).
Within the Insignia lineup
Ranked 47 of Insignia's 92 certified refrigerators, this sits between the NS-WC14SS3 ($23/yr, the brand's cheapest) and the NS-RBM18WH0-C ($88/yr, its priciest).
Insignia NS-CF30TMSS6-C over 13 years
NAHB's Study of Life Expectancy of Home Components puts a typical refrigerator's service life at 13 years; run the Insignia NS-CF30TMSS6-C that long and it costs about $667 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified refrigerators go, $51/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
The Insignia NS-CF30TMSS6-C already costs $51/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
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. At rank 1,498 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.