I guess I didn't approach the question correctly. If you are buying an E trek new then you should get a hold of Sportsmobile and have them build you an E Trek with what you want in it.Sportsmobile has been building "E Treks " for years. There are 3 shops. Indiana, Austin Texas and Fresno Ca. There is a very informative video on You Tube about their competing model. It uses diesel cooking,heating and water heater.It has or can easily have solar.Austin and Indiana are a little more into custom than Fresno. They do a complete run down in this video.
sprinter SMB.At 4:35 in the video it shows the 7 cubic foot fridge.