Generacs 6853 HomeLink™ upgradeable manual transfer switch is a pre-wired electrical device thats installed next to your homes circuit panel. During an outage, it delivers power to hard-wired appliances (such as furnace, well pump and lights) with the push of a button, safely and easily eliminating the need for multiple extension cords. It comes standard with 8 circuits, expandable to 10 circuits. When youre ready to install an automatic home standby generator, a certified electrician will change out the panel located in the HomeLink with an automatic switch upgrade panel and new faceplate and its ready to be connected to a home standby generator (11 kW maximum).