Running cost for the Smeg STU1822
The Smeg STU1822 is certified by ENERGY STAR at 234 kWh a year, about average for its category to run among dishwashers currently certified.
That $44 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.
How the Smeg STU1822 compares to other dishwashers
The category average is 232 kWh/yr; this model runs 0.9% above it, ranking 251 of 737 dishwashers tracked here for running cost. 737 certified dishwashers, one average, about $0/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Smeg STU1822 on that list: Smeg DW8601X ($44/yr, 234 kWh/yr) runs slightly less, while SPT SD-9254SS ($44/yr, 234 kWh/yr) runs slightly more.
Same brand, different models
Ranked 6 of Smeg's 9 certified dishwashers, this sits between the DW8630 ($41/yr, the brand's cheapest) and the STU8623 ($45/yr, its priciest).
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the Smeg STU1822 that long and it costs about $396 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified dishwashers go, $44/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
$44/year to run is the predictable cost of the Smeg STU1822; a protection plan covers the unpredictable one, a repair bill.
How this was checked
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. At rank 251 of 737 for running cost, see the dishwasher category page for the rest of the field, or the guide to how much your state matters.