The only reason to consider it is so that I have more options on the house battery side. The battery box under the step it very tight while the rear compartment is much larger. I'll probably just leave it alone and see how it all works out - we have only had it a short time. And as to the engineers have a good reason - I doubt that very much.....I believe this is only for the diesel as it requires 2 batteries and there is no place to put them under the hood. I suspect they did not make enough of them to really spend a lot on design.