What the Summit DW183W costs to run
The Summit DW183W 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.
Efficient, or not, for a dishwasher
The category average is 232 kWh/yr; this model runs 0.9% above it, ranking 262 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 $0/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 Summit DW183W: Summit ADADW24W ($44/yr, 234 kWh/yr), then Summit DW183WADA ($44/yr, 234 kWh/yr).
Comparing Summit's own models
Ranked 10 of Summit's 33 certified dishwashers, this sits between the DW18SS4 ($41/yr, the brand's cheapest) and the LDW24WA ($44/yr, its priciest).
What this adds up to over time
9 years is NAHB's typical service life for this category; at $44/year, the Summit DW183W adds up to about $396 in electricity over that span.
Is it worth replacing?
Efficient as certified dishwashers go, $44/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
A dishwasher like the Summit DW183W 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.
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 262 of 737, the Summit DW183W 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.