Electrical surges can cause big problems. When surge protection is installed at the electrical panel, it helps protect all the devices in the home, including your appliances. Whole Home Surge Protective Devices (SPDs) reduce higher-level surges that might otherwise overwhelm plug strips and damage connected household equipment. SPDs also provide surge suppression for important items that are not compatible with plug strips, such as a home's HVAC and smart appliances (washer, dryer, refrigerator, stove, oven, and lighting).