[scottz]

Now I'm working on another solution. Since I am going to install the Hughs, I will already have a 50A plug pigtail coming off the shore terminals of the ATS. I will simply make a cord with a 30A jack for the inverter. When I want to use the inverter instead of shore power, I'll:

*Turn off all the breakers I don't want to load the inverter
*Unplug the ATS from the Hughs box and plug it into the inverters 30A jack using a 50A-30A dogbone.

Later if i want I can install the second transfer switch.