Smeg DW8620: running cost
ENERGY STAR certifies the Smeg DW8620 at 235 kWh/yr, about average for its category to run for its category.
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 DW8620 compares to other dishwashers
The category average is 232 kWh/yr; this model runs 1.3% above it, ranking 293 of 737 dishwashers tracked here for running cost. 737 certified dishwashers, one average, about $1/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Smeg DW8620 on that list: Smeg DW8220 ($44/yr, 235 kWh/yr) runs slightly less, while LG ADFD544*** ($45/yr, 238 kWh/yr) runs slightly more.
Within the Smeg lineup
Ranked 8 of Smeg's 9 certified dishwashers, this sits between the DW8630 ($41/yr, the brand's cheapest) and the STU8623 ($45/yr, its priciest).
Cost over its typical lifespan
Over the 9-year service life NAHB reports for this category, running the Smeg DW8620 costs roughly $398 in electricity, separate from the purchase price.
Weighing a replacement
Efficient as certified dishwashers go, $44/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 dishwasher like the Smeg DW8620 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.
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. Ranked 293 of 737, the Smeg DW8620 sits in the middle of the dishwasher category, see the guide to why your state changes this number for the other half of the math.