Please note that the "Companion", as the name suggests, is designed for use in conjunction with another EU2200i (two generators 'paired' together) and that's
required to gain the benefit of the Companion's 30A output / outlet. With a Companion model you aren't paying for (or getting) 30A output, you're paying for the simplicity of its pairing capability.
Unless you plan from the get-go to buy and run a
pair of generators to gain that higher-output benefit IMO you should
start with purchase of the slightly lower-price 'standard' EU2200i. You can always grow your system to higher-amp output by adding the "Companion" later if you want.
In either case, you'll need an adaptor between the generator (or generator pair) and your Escape 30A shore power cord, even the 30A outlet on the Companion does not match.
Just for your consideration, Have Fun!