Rare 2020 Winnebago Mossman B Slide-out and Off-grid Lithium Upgrade Fully Self-contained

The November build 2020 Winnebago Mossman B is one of the most sought after caravans in the Australian touring market, known for its rare slide out design, premium composite construction, and exceptional long distance comfort. Built by Apollo under the Winnebago brand, the Mossman B delivers a true residential feel on the road—something few caravans in this size and weight class can match.

The Mossman B is already a scarce model, and there are currently no other 2020 Mossman B caravans for sale anywhere in Australia. Owners tend to hold onto them long term due to their build quality, layout, and the highly desirable slide out bedroom—making this listing a rare opportunity.

At 22 feet, the Mossman B is designed for two to three travellers, featuring a walk around queen bed housed in the offside slide out, a spacious front club lounge/dinette, and a full rear ensuite. The slide out is a major selling point: it dramatically increases interior space, creates a genuine bedroom zone, and is one of the key reasons these vans are so tightly held and hard to find on the second hand market.

This particular 2020 model is further enhanced with a comprehensive off grid electrical upgrade package, including dual lithium batteries, multiple solar panels, BMP Pro charging and monitoring hardware, and a diesel heater—significantly elevating its capability beyond factory specification. And is fully self-contained.

*** Price Negotiable, make an offer.

Dimensions & Capacity
• Overall Length: 8.40 metres (27.6 ft)
• External Body Length: 6.81 metres (22.4 ft)
• External Body Width: 2.49 metres (8.2 ft)
• Internal Height: 2.02 metres (6.6 ft)
• Travel Height: 3.04 metres (10.0 ft)
• Sleeping Capacity: Up to 3 people (features a main bed and a convertible dinette)

Weights
• Tare Weight: 2,198 kg
• Gross Vehicle Mass (GVM): 2,669 kg
• Aggregate Trailer Mass (ATM): 2,950 kg
• Payload Capacity: Up to 753 kg
• Ball Weight: ~218kg

Chassis & Construction
• Body Structure: Gelcoat-finished fibreglass sandwich composite panels with a foam core.
• Chassis: 6-inch hot-dipped galvanised steel box-section box drawbar and rail.
• Suspension: Dual AL-KO Independent Rubber Suspension (IRS) axles.
• Brakes: 10-inch electric drum brakes.
• Wheels: 16-inch alloy wheels.

Plumbing & Gas
• Fresh Water: 164 Litres (split across 2 x 82L tanks).
• Grey Water: 82lt Tank (upgraded from standard)
• Gas Cylinders: 2 x 9 kg bottles mounted on the A-frame.
• Hot Water System: Truma 14L gas/electric heater.

Power & Electrics
• Batteries: 2 x ITECH120X 12V 120ah Lithium Batteries (upgraded from standard)
• Solar Power: 1 x 150W (standard)
• Solar Power: 2 x 200 Watt 12v Solar Panel Monocrystalline (upgraded from standard)
• Battery Monitoring: BMPRO Battery Plus 35SR DC-DC MPPT charger system (upgraded from standard)
• Invertor: 3000 Watt ItechWorld Pure Sine Invertor (upgraded from standard)

Internal Amenities & Appliances
• Slide-out: Offside panel that expands the bedroom and allows for massive dresser/wardrobe space
• Kitchen Equipment: Thetford Triplex stove (3x gas burners), grill, full oven, and a microwave.
• Refrigeration: Dometic 190L RUC6 6408X 2 way compressor fridge.
• Climate Control: Ibis 3, 3.2kW reverse-cycle rooftop air conditioner.
• Bathroom: Fully enclosed rear ensuite with a separate shower cubicle, cassette toilet, and a vanity basin.
• Washing Machine: 2.5 kg top-loader washing machine integrated into the ensuite.

Full List of Upgrades
• Diesel Heater – Webasto Air Top 2000 STC, controller next to bed
• Lockable Heavy duty diesel Fuel tank 10L
• Batteries: 2 x ITECH120X 12V 120ah Lithium Batteries
• Solar Power: 2 x 200 Watt 12v Solar Panel Monocrystalline
• Battery Monitoring: BMPRO Battery Plus 35SR DC-DC MPPT charger system
• 3000 Watt ItechWorld Pure Sine Invertor
• 18’ Awning
• Fridge – RUC6 6408X 2-way compressor fridge
• Stove – Thetford Triplex MK3 Gas Stove
• Grey Water tank 82lt
• Thule Bike Rack (2 bikes)
• Roof hatch upgrades to include illuminated lighting
• Leather bed head
• Dress curtains and shears on windows

The Winnebago Mossman B is one of the rarest caravans in Australia, with very few ever built and almost none appearing on the market. The 2020 model is especially scarce, combining Winnebago’s high‑quality composite construction and exceptional workmanship with a full slide‑out bedroom and every major off‑grid upgrade — dual lithium batteries, expanded solar array, BMPRO charging system, 3000W inverter, diesel heater, compressor fridge and upgraded grey water. Comparable slide‑out caravans with this level of build quality and off‑grid capability commonly exceed $100,000, making this a standout opportunity for buyers seeking space, durability and true self‑contained independence.

*** Standard Jockey Wheel, Black Jack NOT included