Running cost for the Bosch SGX78C***
The Bosch SGX78C*** 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 400 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 Bosch SGX78C***: Bosch SGV78C*** ($45/yr, 240 kWh/yr), then Bosch SHE3AEE** ($45/yr, 240 kWh/yr).
Within the Bosch lineup
Ranked 18 of Bosch's 55 certified dishwashers, this sits between the DWHD661EFP ($40/yr, the brand's cheapest) and the SPX68C*** ($45/yr, its priciest).
Cost over its typical lifespan
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the Bosch SGX78C*** that long and it costs about $406 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
The Bosch SGX78C*** 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
Nothing here is estimated from a nameplate wattage; the 240 kWh/yr is ENERGY STAR's own certified figure for this model. At rank 400 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.