Wire inverter to existing transfer switch or need another?

MrWizard wrote:

you do not have a built in generator

just plug the shore cord into the inverter

move shore cord to portable genny or shore as needed

no NEED to wire into anything else

Definitely the KISS way to go ! To make life a bit simpler, you might want to wire a weatherproof OUTLET from the inverter to the outside of the TT near the shore power cord. This would be the ONLY output from the inverter. When you want inverter power, turn off the converter and plug your shore power cord into that outlet. Easy peazy !