ETI wants to be able to offer as many options as possible, but on the fridge issue, any fridge they install has to provide adequate internal capacity as well as fit through a 22" door. You'd be surprised how few of those there are. Going with one manufacturers series and one type means they can offer a small, medium and large fridge - all of which will fit through the door and have the same width when installed. It also means they can offer the same series to people with solar as those without it, and there is no redesign or change in the build process to accommodate different widths. When I mentioned it to Reace, he made it clear that NovaKool installed by ETI is a non starter. He has his reasons I am sure. I agree with those who suggest you could omit the fridge and install a NovaKool or other suitable compressor fridge yourself. Since you'd get a credit for not having ETI install a fridge, the cost difference would not be that great.
"You can't buy happiness, but you can buy an RV. And that is pretty close."