On a different note, has anyone seen or done or figured out the wiring for a 2 or 3 stack radian system? Is there a central Xtransfer switch or anything like that, or just their single BOS box for below the inverter? I've got a project coming up that I need to figure out if I'm using an 2/3 stack XW or 2 stack Radian. thanks, jay peltz power