This is the floor plan that appeared on the video. That looks like an induction cooktop. I imagine the bed could infill with the back cushions for one large bed. Receptors front and back for stowable tables. Make the bed up and move the bikes forward or outside.
These are the lithium ion batteries they showed in the video. They look the same or similar to the ones that showed up in the Wendland new CS video. There are eight batteries there in what looks like a stainless steel container I am guessing would latch to the underside of the van. Once put away you really do not have to tend the batteries.