I have a Generac CP5500 that we are looking at using for a coffee trailer. It will not supply enough power for everything so I was looking at running two generators in tandem. We will need around 10k watts total, including start up wattage, as far as I can tell. Can I run two generators in tandem? Do they need to be the same brand or model? We have 220 V equipment so we will be using the 220 V port on the generator. Any help pointing me in the right direction would be appreciated.