Running cost for the Zline DWMT-24
The Zline DWMT-24 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 736 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 Zline DWMT-24: Wizard WDBE32M0A* ($45/yr, 240 kWh/yr), then Zline DWS3-24 ($45/yr, 240 kWh/yr).
Same brand, different models
Ranked 7 of Zline's 8 certified dishwashers, this sits between the DW7713-24 ($44/yr, the brand's cheapest) and the DWS3-24 ($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 Zline DWMT-24 that long and it costs about $406 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
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
A dishwasher like the Zline DWMT-24 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. The Zline DWMT-24 is among the most expensive dishwashers tracked here to run, see the full Dishwasher category page for cheaper alternatives.