Hi. I am buying a new 10,000 watt portable generator with the intent to plug it into a transfer switch to my main panel. I plan on bringing an electrician in but have a couple of questions in the meantime. I have a main panel that is 200 amps and a subpanel in my garage but the main panel has the circuits that I want to use with the transfer panel. The new generator has a 120/240V, 50A – (NEMA 14-50R) outlet. It also has a 30A NEMA L14-30R outlet but I believe it's the 50A outlet I need to use to connect to the outdoor outlet for the transfer switch once it is installed. My question is whether there will be any issues tying in the transfer switch into the main panel given that there are only 2 slots left. I have an acquaintance who is a contractor and he was going off about potential issues I may have and that I may need to upgrade my panel. Anyway, see attached photo of my main panel. Slots 28 and 30 are available. Slots 16 and 18 go out to my subpanel which does have a number of open slots. I only know the basics about how a transfer switch ties into the main panel. I don't know any more than that so I am looking for an assessment and any advice anyone has. Thanks!
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