The Companion model has the 30 amp RV outlet built in. It doesn't produce any more power than the standard EU2000i. It will allow you to plug straight into that 30 amp outlet with your regular 30 amp cord, and draw 13.3 running amps, or 16.7 surge amps. You can get those through a standard 20 amp cord, too. The Companion model MSRP's at about $130 more than the Standard model. However, if you DO get a second EU2000i, the parallel CORD is cheaper than the parallel KIT with a 30 amp outlet. With what you appear to need, you could get the standard model first, and if you decide you need more power, add the Companion model at any time. Two standard 20 amp outlets vs. one 20 amp and one 30 amp.