SPT SD-6513W: running cost
At 240 kWh/yr, the SPT SD-6513W's ENERGY STAR certification puts it about average for its category to run against every other certified dishwasher.
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 700 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 SPT SD-6513W: SPT SD-6513SS ($45/yr, 240 kWh/yr), then SPT SD-9263SS ($45/yr, 240 kWh/yr).
Comparing SPT's own models
Ranked 8 of SPT's 10 certified dishwashers, this sits between the SD-2224** ($29/yr, the brand's cheapest) and the SD-9263W ($45/yr, its priciest).
Cost over its typical lifespan
Over the 9-year service life NAHB reports for this category, running the SPT SD-6513W costs roughly $406 in electricity, separate from the purchase price.
Weighing a replacement
Efficient as certified dishwashers go, $45/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
The SPT SD-6513W already costs $45/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
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 700 of 737, the SPT SD-6513W 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.