Payload Planning: What Really Fits in 500kg

Payload Planning: What Really Fits in 500kg

Your payload — the difference between Tare and ATM — is what you've got left to load before you're over. For most Mars caravans that's somewhere between 250kg and 500kg depending on model and options. Sounds like a lot. It isn't. Here's what actually fits.

The Stuff That Goes In First (And You Don't Think About)

ItemTypical Weight
Fresh water (1L = 1kg)80–240kg (full tanks)
Grey water (if stored)up to 75kg
2 × 9kg gas bottles (full)~40kg
Bedding, pillows, doonas15–25kg
Annexe + walls + pegs20–40kg
Generator (if you carry one)20–30kg

Running total: easily 200–300kg before you've packed a single shirt.

The Family Stuff That Eats the Rest

ItemTypical Weight
Clothing — 2 adults, 2 weeks30–50kg
Clothing — 2 kids, 2 weeks15–25kg
Food in fridge + pantry20–40kg
Cooking gear, pots, utensils10–20kg
Camp chairs (4)10–15kg
Outdoor table5–10kg
Tools, recovery gear, spares20–40kg
Toys, books, electronics, chargers10–20kg
Toiletries, towels, first aid10–15kg
BBQ + gas hose10–15kg

Add another 140–250kg for a couple-plus-kids trip.

The Maths That Catches People Out

If your van has a 500kg payload allowance and you load:

  • 240L water = 240kg
  • 40kg gas
  • 30kg bedding
  • 50kg annexe

That's 360kg before any clothing, food or family gear. You've got 140kg left for everything else.

This is why couples with a couples van usually have plenty of headroom and families with a family van often struggle.

How to Get Within Your Limits Without Compromising the Trip

Don't Travel With Full Tanks

Water is the easiest weight to manage. You don't need 240L on board between caravan parks — fill up when you arrive at the next powered site. Carry only what you need for the next leg.

Rule of thumb: 20L per person per day for basic use, 40L per person per day for showers and dishes.

One Bottle, Not Two

If you're heading somewhere with easy gas refills along the way, run with one full + one empty (or one full + spare with 2kg in it) rather than two full bottles. Saves ~20kg.

Don't Pack "Just in Case"

The single biggest source of weight creep is "just in case" gear. Tools you've never used. The third frypan. The fishing rod that didn't come out last trip. Lay everything you're packing on a tarp before it goes in — anything you didn't use last trip, leave behind.

Use the Tow Vehicle

If your tow vehicle has spare payload, put the heavy occasional-use items in the boot or canopy rather than the van — recovery gear, tools, spare wheels, generators. The vehicle is usually rated to carry more weight than you think.

Light Camp Gear

Camp chairs, tables and BBQs all come in lightweight versions. The difference between a 2.5kg chair and a 6kg chair × 4 people = 14kg saved without thinking about it.

What to Weigh, Not Guess

People consistently underestimate how heavy their gear is. If you've never weighed your packed van, do it (see How to Weigh Your Loaded Caravan). Bathroom scales work surprisingly well for spot-checking individual items — pop them on, pick up the box, check the difference.

Where People Get the Worst Surprises

  • Tools and recovery gear — winches, snatch straps, MaxTrax, jacks, full tool kit. Easily 50kg+ if you're "ready for anything".
  • Pantry creep — long-life staples build up over time and rarely get cleared out.
  • Kids' gear — Lego, books, scooters, sports gear. 20kg of "they might want this" lives in most family vans.
  • Awning extras — walls, floors, pegs, ropes, draught skirts. A full kit can add 30kg+ on top of the awning itself.
  • "Just one more battery" — additional batteries are typically 10–30kg each.

What to Do If Your Van Just Won't Fit Your Trip

If you've trimmed everything sensible and you're still over, the conversation worth having is whether you're in the right van. A 300kg payload van for a family of four on a 6-month lap isn't realistic. A 500kg payload van might be. Talk to us — we'd rather match you to a model that suits than have you constantly fighting weight limits.

Related: How to Weigh Your Loaded Caravan· Ball Weight: How Packing Changes Everything · Weights 101