If that is what it is called. I'm trying to figure out were to insatall it in my system. I have a meter (grid power) a auto transfer switch for whole house generator, goes thru a manuall transfer switch to my solar power inverters which tranfer power automatically from the grid. I think it should go in place of my whole house generator or maybe another tranfer switch after the generator transfer switch. I think if I see it and figure out how it work and can place it in the system.