What the KitchenAid KDFS224S*** costs to run
The KitchenAid KDFS224S*** is certified by ENERGY STAR at 240 kWh a year, about average for its category to run among dishwashers currently certified.
That $45 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 dishwasher
The category average is 232 kWh/yr; this model runs 3.4% above it, ranking 615 of 737 dishwashers tracked here for running cost. That average is drawn from all 737 dishwashers ENERGY STAR currently certifies, not an outside number, a $2/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 KitchenAid KDFS224S***: Kenmore KKDW3RPHLIFT-45SS ($45/yr, 240 kWh/yr), then KitchenAid KDFS324S*** ($45/yr, 240 kWh/yr).
Comparing KitchenAid's own models
Of the 14 ENERGY STAR certified dishwashers KitchenAid makes, the KDFS224S*** is the cheapest to run, about the same, within a dollar a year, less than KitchenAid's priciest, the KDTS434S***.
KitchenAid KDFS224S*** over 9 years
9 years is NAHB's typical service life for this category; at $45/year, the KitchenAid KDFS224S*** adds up to about $406 in electricity over that span.
Weighing a replacement
Efficient as certified dishwashers go, $45/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified dishwashers before buying.
If you're keeping it
The KitchenAid KDFS224S*** already costs $45/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. Ranked 615 of 737, the KitchenAid KDFS224S*** 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.