Look at the FAQ section on their website under "Should a hardwired EMS system be installed before or after the Transfer Switch" and I think you will see their clear preference. Also, I have read of discussions with Tommy Fannelli in which he also suggests placement before the transfer switch. While I am leaning toward moving my Progressive in order to protect my coach from more devastating, if rare, cases of problems with the gen set, I won't do so until after I contact Progressive personally. Since they so clearly do prefer protecting the transfer switch, I want to ensure I haven't missed something before moving the Progressive. It's on my list. Others may want to call and report back sooner than I will get around to it.
Frank W. '09 Cayman 38 SBD '08 CRV
Lake City, Florida