Curious as to why you think that? I believe the Nimbl and OEX Basecamp utilizes 1 tons with no problems.
I'll admit to feeing a little cheeky when I commented on weight this morning.......
but seriously:
Is the Nimbl also over payload on a 3500? Probably? But it is removable, so they aren't technically responsible for you choosing to overload your vehicle......
The Basecamp: weighs 2950 Dry weight, which is reasonable for a 1-ton. The basecamp also does not include 40" tires and winch bumper....so if a customer does that on their own and exceeds payload, that is on the individual not on OEV.
I'd be excited if TruckHouse has cracked the code, and created an amazing 1-ton integrated camper platform.
However, from my experience, it is really hard on the 1-ton to "have it all" without compromising on weight.
ie, winch, bumper, 40' tires, quad cab, diesel engine.
Traditionally the AEV upfitting is subtracting from the factory payload of the vehicle.
But as technology advances, it's getting closer. Lithium batteries allow for a much lighter camper. Maybe Truckhouse has it figured out with the Carbon body?