The best time to run your dishwasher is typically in the late evening or at night. “this is because energy demand is lower, which can reduce costs and strain on the power grid. ” Is it safe to run a dishwasher all day? · the best time of day to run your dishwasher is in the evening to ensure you have a full load from the day, says steve schmahl, virtual appliance expert at frontdoor. · experts say the best time to run a dishwasher is during off-peak electricity hours. When is a good time to run a dishwasher? Peak and off-peak times, as well as the costs associated with them, can change with the season or even the day of the week. During these hours, electricity rates may be lower if you are on a time-of-use plan. · peak times are typically early mornings before work and evenings. · while its generally safe to run a dishwasher any time of the day, your model may have specific instructions and offer an energy-efficient setting that saves even more money. But, for the sake of safety, try to adjust those hours so that its done before you get into bed. Should i run my dishwasher at night? “ [this is] usually at night, but before you go to bed,” glenn lewis, president of mr. Experts share about off-peak hours , energy-efficient tips, and safety precautions. · most dishwasher manufacturers recommend running it during off-peak hours to save energy. · discover how running your dishwasher at the right time can save you money. Why should you run your dishwasher during off-peak hours?