Generac.s 6852 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).