What the Samsung DW80CG545***** costs to run
The Samsung DW80CG545***** is certified by ENERGY STAR at 239 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% above it, ranking 371 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 $1/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 Samsung DW80CG545*****: Samsung DW80CG542***** ($45/yr, 239 kWh/yr), then Samsung DW80R995*** ($45/yr, 239 kWh/yr).
Comparing Samsung's own models
Ranked 19 of Samsung's 22 certified dishwashers, this sits between the DW70H83YETR ($42/yr, the brand's cheapest) and the DW60R2014** ($45/yr, its priciest).
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the Samsung DW80CG545***** that long and it costs about $404 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified dishwashers go, $45/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
At $45/year just to run, a dishwasher is worth protecting against an unplanned repair bill on top of that.
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 371 of 737, the Samsung DW80CG545***** 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.