Appliances Small Appliances Microwave / Toaster Oven Microwaves use up to 50% less electricity than a electric stove. Use instead of an oven to warm leftovers, especially during summer. Electric Kettles The most energy-efficient way to boil water is with an electric kettle. Keep your kettle free of mineral deposits with regular cleanings. More Make sure your kettle has an auto shut-off and an insulated handle. Keep other small kitchen appliances unplugged when not in use to reduce electricity referred to as "phantom power" or "standby power".