Complete Off-Grid Expedition Box + 4x4 Truck — 1,600W Solar, Victron, Full Kitchen & Bath — €18,000 — Spain

[cheeese]

Price: €18,000
Location: Cunit, Spain (Tarragona province, ~60 km south of Barcelona)
Contact: PM here or email all.out.phoenix@gmail.com

What you are buying: A fully equipped, road-proven expedition habitation box with complete off-grid systems, mounted on a 2021 Sammitr MPT 4x4 chassis. The box can be remounted on a different truck chassis or used as a standalone off-grid tiny home / cabin. The truck chassis and running gear are included. This is not a drive-away vehicle. The buyer arranges transport (flatbed, trailer, etc.) from Cunit, Spain.

Why This Is Worth Your Attention​

This box was built in 2021 and lived in full-time for over three years across 40,000 km — Thailand, Malaysia, Pakistan, Iran, Turkey, and across Europe including two Scandinavian winter loops at -15°C. Every system has been tested in real conditions, not on a bench or in a driveway.

If you're building an expedition truck or off-grid tiny home, this box saves you 18-24 months of design, sourcing, fabrication, and integration. Everything is installed, wired, plumbed, and working. You also get the complete engineering package — CAD files, wiring diagrams, plumbing diagrams, and supplier documentation for every component.

Selling because our family is growing and we've run out of seats.



Instagram: @all.out.phoenix

What's Included​

• GRP habitation box — Custom sandwich panel (ArmaForm Eco insulation, 55mm walls/roof, 75mm floor), CNC Plastwood interior, ~2.0 x 2.0 x 3.6m
• Solar array — 4 x 400W Risen bifacial panels on motorised extending roof rack (1,600W total)
• Victron electrical — MultiPlus 24/5000, Cerbo GX, 2x MPPT 150/60, Orion DC-DC converters, SmartShunt, 3x Lynx Distributors
• LiFePO4 batteries — 24V 8S config, Overkill Solar/JBD BMS, MQTT monitoring. ~400 Ah current (~9.6 kWh, degraded from 600 Ah)
• Electrical distribution — Circuit breakers, MEGA-fuses, 10x battery disconnects, full wiring harness
• HB9000 A/C — Under-bench heat pump (heating + cooling)
• Diesel heater — Added after Scandinavian winter testing
• Water — 220L tank, Jabsco 24V pump (new late 2025), 6-stage RO filtration with remineraliser, John Guest fittings
• Hot water — Nautic-Therm (engine coolant, 24V DC, 230V AC modes)
• Kitchen — Induction stovetop, Isotherm Double Drawer 160 fridge (SS, AC/DC), sink
• Bathroom — Shower, Nature's Head composting toilet, NCE washer/dryer, Isotherm freezer
• Climate — MaxxAir roof fan, skylight
• Smart control — Home Assistant controls everything. Cerbo GX via MQTT. HMI kitchen display
• Exterior — Electric folding stairs, electric 2m awning, luggage doors both sides, rear hatches, shore power, city water fill
• Truck chassis — 2021 Sammitr MPT 4x4, ~40,000 km, 2.8L turbo diesel 102 HP, 5-speed manual, 4x4 with low range, 5,000 kg GVW, Ironman shocks, M/T tyres
• Documentation — Full CAD files (STEP/STL/DWG/SketchUp), 4 revisions of box drawings, wiring diagrams, plumbing diagrams, all supplier manuals
• Camping chairs, table, electric scooter, toolbox with tools

The Box​

Custom GRP sandwich panel habitation box by Sammitr (Thailand). ArmaForm Eco insulation by Armacell (0.028 W/(m·K)). Walls/roof 55mm, floor 75mm. CNC Plastwood interior panels.

Mounted on a separate subframe with isolation mounts — bolted, not welded. It can be lifted off. Interior: ~2,000 x 2,000 x 3,600mm.

Bedroom (rear): King bed, full width. Natural latex mattress. Skylight, windows both sides. Under-bed storage via rear hatches. Projector and screen.

Kitchen (mid): Induction stovetop, Isotherm Double Drawer 160 fridge (5.5 cu. ft., AC/DC), sink. Upper cabinets.

Dining (mid): Bench seating, sliding table. Converts to single bed.

Bathroom (front): Shower, Nature's Head composting toilet, NCE washer/dryer, Isotherm freezer.

Entry: Left side door with flyscreen. Exterior luggage doors both sides.

The Truck Chassis (Included)​

2021 Sammitr MPT 4x4. 2.8L turbo diesel, 102 HP, 240 Nm. 5-speed manual, part-time 4x4 with transfer case (2H/4H/2L/4L). 5,000 kg GVW. ~40,000 km. Extended cab, bull bar, cab roof rack with crane. Ironman shocks. M/T tyres on 5.5x16" steel wheels.

Cosmetic surface rust from Scandinavian winter road salt. Engine and drivetrain functional. Useful as a donor, project base, or static platform for the box.

What You Can Do With This​

• Mount the box on your own truck — Fuso Canter, MAN TGL, Iveco Daily, or similar. Subframe allows adaptation. Full CAD files included.
• Use as an off-grid tiny home / cabin — fully self-contained. Set it on a pad or trailer and plug in nothing.
• Strip the systems for your own build — the Victron package, solar, batteries, and appliances alone are worth well over the asking price.
• Export outside the EU — in many countries the truck can be registered and driven as-is.

Known Issues​

1. Not drivable. Buyer arranges transport from Cunit, Spain.
2. Battery degraded. ~400 Ah from original 600 Ah. Some cells may need replacing. All monitoring data available.
3. Surface rust on chassis. Cosmetic only. Does not affect the box or systems.

Contact​

Located in Cunit, Spain (~60 km south of Barcelona). Viewings by appointment. Buyer collects.

Contact: PM or email all.out.phoenix@gmail.com
Payment: Bank transfer preferred.

Full documentation available on request. Happy to answer questions here or via PM.

 

[mog]

A very nice rig in all aspects, but I especially like your solar set-up with the side-out panels which also make a great awning.

 

[cheeese]

A very nice rig in all aspects, but I especially like your solar set-up with the side-out panels which also make a great awning.

Cheers @mog, appreciate the kind words.

I've attached photos.

If anyone has build or travel questions, please hit me up too. Happy to help.

 

[1cambo]

Honestly, I am shocked at the price!!!
It seems very low for such a nice rig, only thing that gives me pause is the toilet system because I have heard people in North America dispose of their waste in garbage cans at gas stations etc and I am disgusted at that thought! Where/how do you dispose of human waste? Urine seems obvious but what about the "compost" and how long does it take to be actual compost? Good luck with the sale!

 

[cheeese]

Yeh, it's a fast sale. We're super keen to do the Americas, start in Canada and build a new rig there and drive down. And now we have two young ones, we are on a deadline before schooling starts. If there was the possibility of adding more seats to this rig, we would in a heartbeat.

Honestly, once you go compost, you don't go back. No smell, easy disposal, no chemicals. Composting really depends on the materials you use. We found this stuff works best: https://amzn.eu/d/08DCp71X

Funnily enough, we have the super popular American brand one too. Cost me two and half kidneys to import into Thailand

 

[mog]

Honestly, I am shocked at the price!!!

I also think it is an awesome rig at a killer price, but some factors I'm sure @cheeese has considered is it far too new to be imported permanently into the USA (2001 or older) or Canada (2011 or older) {a bizarre world where new is a negative } and in Europe, there is a lot of similar rigs, so a tougher market. If it was importable to the USA or Canada, then twice the price ??? YMMV

 

[1cambo]

I also think it is an awesome rig at a killer price, but some factors I'm sure @cheeese has considered is it far too new to be imported permanently into the USA (2001 or older) or Canada (2011 or older) {a bizarre world where new is a negative } and in Europe, there is a lot of similar rigs, so a tougher market. If it was importable to the USA or Canada, then twice the price ??? YMMV

I am not sure about USA but there are ways around the import rules.....

 

[cheeese]

Update: Price dropped to €18,000. We're selling this as a complete off-grid habitation box with truck chassis included, not as a drive-away vehicle. If you're building an expedition truck or looking for an off-grid cabin, this is everything you need. See the updated first post for full details.