We went to a weighbridge in Caboolture with our Opus Camper to get everything weighed, to check we are compliant, the guy there was really helpful. He explained that the weighbridge is accurate to plus / minus 20kg, and we identified the following weights :

1. Laden weight Opus camper = 1820kg

2. Laden weight Nissan with luggage and occupants, but without camper attached = 2380kg.

3. Laden weight Nissan with luggage and occupants, with camper attached = 2580kg

4. Ball weight on Nissan = 200kg

5. Combined weight of Nissan and camper = 4200kg

So my question is this :

The GVM of the Nissan is 2715kg.

In relation to the max weight we can place on the towball of the Nissan, the Nissan instructions state when the towball weight is 200kg, the GVM should be reduced by 300kg. So this gives us two possible scenarios:

1. With the GVM of 2715kg being reduced by 300kg, our new GVM is 2415kg. Given the Laden weight Nissan with luggage and occupants, and the camper attached, and therefore also the weight of the ball, is 2580kg, this means we are 165kg over our GVM.

2. Given the Laden weight Nissan with luggage and occupants, and the camper attached and therefore also the weight of the ball, is 2580kg, we do not need to reduce the GVM by 300kg, as we know what the total weight of the Nissan, including the weight of the ball of the camper, is 2580kg. Given the ‘un de-rated’ GVM of the Nissan is 2715kg, this means we are 135kg under our GVM.

I’d appreciate anyone’s advice, as to which scenario is correct, are we 165kg over our GVM, or 135kg under?

Also, if our ball weight came in at 200kg, our car can take 200kg, do you really think it will make any (adverse) difference if we add another 9kg gas bottle?

Cheers!