EdgeStar DWP61ES Countertop Dishwasher Review$389.00
The EdgeStar relies on hot water input. Though it has internal heating elements, it doesn't get water much past 148 degrees. That means less energy is used on heating water. Cycles used between 0.26 and 0.51 kWh of electricity per wash depending on the cycle.
The DWP61ES used very little water for its equally small wash tub. Cycles ran between 2.56 and 3.82 gallons of water, which is probably less than you're currently using to hand wash your plates.
Yearly Running Cost
An average year of running the Edgestar DWP61ES would set you back a total of $18.37 in water and electricity. Only you can decide if that's worth not having dishpan hands.