The GVM (gross vehicle mass) is the maximum allowable total mass of a fully loaded motor vehicle as specified by the manufacturer.
Consisting of the tare mass (base weight/mass of the vehicle) plus the load.
The load would include fuel, all occupants, cargo and any add-on accessories.
Tow ball weight (ball load or tow ball mass) is the load exerted on the tow ball of the tow vehicle. In Australia, ball eight is generally around 10% of the ATM. Check your vehicle specs.
All the extra bits on board including water, gas, cargo, clothes, accessories and add-ons.
Payload is the ATM minus the Tare Weight.
Base weight at manufacture.
Weight of your caravan empty and unhitched from the tow vehicle. No payload including water, gas in bottles or after market accessories.
Base weight at manufacture.
ATM is the combined weight of the camper and its full load when it is not coupled to a tow vehicle.
Weight of your caravan fully loaded when it is still hitched to the tow vehicle.
Weight of your tow vehicle and caravan hitched together with both fully loaded.
