Generac...s 6854 HomeLink™ upgradeable manual transfer switch is a pre-wired electrical device that...s installed next to your home...s 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 you...re 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 it...s ready to be connected to a home standby generator (11 kW maximum).