I understand that but when your panel is on there is always juice going to the ssr right? so they are always on and switching whether your contactor after the ssr is on or off. also ive seen in some cases where they fail and have a meltdown. in your setup you cant simply shut off the contactor supplying power to the malfuctioning ssr and brew with another output unless im missing something. Your way will work, I just believe the other way has more advantages as does controlling each element with its own dedicated ssr switch. due to power restrictions, I use a 3 way switch to only allow one contactor at a time to be on and supply power to one kettle at a time in my setup so wiring the contactor first just seemed safer with less components running at once.