I think it's to have the generator start up unloaded.
There won't be any problems with the EMS unit with this generator. It's not an inverter generator of any sort, so its output won't degrade or otherwise turn into a square wave output. It produces a sine wave due to the powers of physics and mathematics. Since the EMS has a little time delay built in, that would solve all the problems at once.
You could also install a (suitably rated) switch in the feed to the generator outlet and put it in some convenient location—it doesn't need to be a circuit breaker, just a switch. 30A switches are not hard to come by in the ordinary light-switch form factor if you do a tiny bit of looking around; at least in my neck of the woods, big box stores like Lowes carry them. I put one in my garage to turn my RV outlet on and off so I didn't have to wander over to the electric panel to turn it on and off (and so that I didn't wear out the circuit breaker by switching it frequently).
