Danby DDW621WDB: running cost
ENERGY STAR certifies the Danby DDW621WDB at 155 kWh/yr, one of the cheaper models in its category to run for its category.
That $29 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
Against the category average of 232 kWh/yr, this model uses 33.2% less, ranking 14 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 $14/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 Danby DDW621WDB: Comfee CDC22P**** ($29/yr, 155 kWh/yr), then Danby DDW631SDB ($29/yr, 155 kWh/yr).
Comparing Danby's own models
Of the 11 ENERGY STAR certified dishwashers Danby makes, the DDW621WDB is the cheapest to run, $16/year less than Danby's priciest, the DDW2404EBSS.
What this adds up to over time
9 years is NAHB's typical service life for this category; at $29/year, the Danby DDW621WDB adds up to about $262 in electricity over that span.
Weighing a replacement
Efficient as certified dishwashers go, $29/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
Whether or not the Danby DDW621WDB ever needs replacing, a repair is the more common failure for a dishwasher, one a protection plan budgets for ahead of time.
Where this number comes from
Ranked 14 of 737, the Danby DDW621WDB 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. The 155 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.