Patent ID: 7888821

Claim:
An assembly that coordinates powering of a second electrical panel having a bus and a first electrical panel having a bus when primary power to the first electrical panel and the second electrical panel is interrupted, the assembly comprising: a primary power feedback switch located in the first electrical panel and electrically interconnected between a primary power source and control electronics that control delivery of auxiliary power to the bus of the second electrical panel, wherein the primary power feedback switch is switchable between a first state in which the primary power feedback switch is electrically connected to the primary power source and a second state in which the primary power feedback switch is electrically isolated from the primary power source; an auxiliary power input switch electrically interconnected between an auxiliary power source and the first electrical panel, wherein the auxiliary power input switch is switchable between a third state in which current flow is permitted between the auxiliary power source and the bus of the first electrical panel and a fourth state in which current flow is prevented between the auxiliary power source and the bus of the first electrical panel; and an interlock interconnected between the primary power feedback switch and the auxiliary power input switch, wherein the interlock is adapted to prevent the primary power feedback switch from being in the first state when the auxiliary power input switch is in the third state.