Running cost for the Summit ADADW18W
At 234 kWh/yr, the Summit ADADW18W's ENERGY STAR certification puts it about average for its category to run against every other certified dishwasher.
The $44 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Summit ADADW18W against the category
That's 0.9% above the dishwasher category average of 232 kWh/yr, and ranks 257 of 737 certified dishwashers for annual running cost, 1 being cheapest. The category average comes from every dishwasher ENERGY STAR currently certifies (737 models), not an outside benchmark, about $0/year above that average at the national rate. See the methodology page.
What sits beside it in the ranking
Summit ADADW24B ($44/yr, 234 kWh/yr) costs a little more to run than the Summit ADADW18W. Summit ADADW18SS ($44/yr, 234 kWh/yr) costs a little less.
Same brand, different models
Summit makes 33 ENERGY STAR certified dishwashers; this one ranks 5 of 33 for running cost, between the brand's cheapest, the DW18SS4 at $41/yr, and its priciest, the LDW24WA at $44/yr.
Summit ADADW18W over 9 years
Over the 9-year service life NAHB reports for this category, running the Summit ADADW18W costs roughly $396 in electricity, separate from the purchase price.
Weighing a replacement
The Summit ADADW18W is already efficient for its category at $44/year. If you're shopping and comparing options, this is roughly what a well-chosen new dishwasher costs to run.
See what else is certified in this category before you decide.
Protecting what you have
Whether or not the Summit ADADW18W ever needs replacing, a repair is the more common failure for a dishwasher, one a protection plan budgets for ahead of time.
Sourcing
At rank 257 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. The 234 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.