A power protector (What many call surge protectors and they truly are) can delay power feed to the Motor home for up to 3 minutes, then in some motor homes the ATS adds additional delay of 1/2 to 1 minute.
It will be a while before I get my Surge Protector hard wired (it is a portable now) I have a mounting point, and know how to do it but have yet to get the cable needed.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times