2019 Ram Promaster 159WB 4 Season Conversion

This van was owner‑built and iteratively refined over more than two years of real‑world travel. It was designed intentionally for four‑season use, extended off‑grid stays, and gear‑heavy adventures rather than occasional weekend camping.

It has been driven and lived in across the western United States and Canada in all seasons, including spring in Sedona, summers in Canada, fall in the Tetons, and dozens of winter trips to Ikon and Epic ski resorts. Every system has been tested, adjusted, and improved through actual use.

I am starting a new chapter that no longer involves van travel, and I am looking to pass this rig on to someone who will continue to use it for exploration and adventure.

Vehicle Overview

1. 2019 Ram ProMaster 2500, white exterior
2. 159” wheelbase, approximately 21 ft overall length
3. Approximately 68,000 miles
4. Driver and passenger swivel seats
5. BFGoodrich KO2 all‑terrain tires, 3‑peak rated
6. Front brush guard and rear ladder
7. Clean title in hand

Power, Solar, and Electrical

The electrical system was designed to support extended off‑grid use with multiple charging sources and sufficient capacity for daily living loads.

1. Hybrid power system consisting of:
2. Two 100Ah lithium house batteries
3. Goal Zero Yeti 3000X portable power station
4. Combined system provides redundancy and flexibility for off-grid use
5. 600W rooftop solar array (6 x 100W panels)
6. Custom solar rack built from angle aluminum and 80/20 extruded aluminum
7. Charging via solar, vehicle alternator, or shore power
8. Inverter capability via the Goal Zero system supporting standard 120V outlets

Primary 12V loads include the refrigerator/freezer, interior lighting, and rooftop air conditioning.

Climate Control and Ventilation

Cooling is handled by a Velit 2000R DC rooftop air conditioner. It operates directly on DC power, is energy‑efficient, and is designed specifically for off‑grid use without requiring a generator.

Ventilation includes a MaxxAir roof fan and operable windows near the bed, allowing comfortable cross‑ventilation. The fan helps maintain consistent airflow through the sleeping area even when parked.

Heating is provided by an Espar gasoline heater (2kW) tied into the vehicle fuel tank. It has been reliable at high elevations, including winter camping at approximately 11,000 feet in Colorado.

Interior Construction and Insulation

The interior emphasizes durability, modularity, and weight efficiency.

1. Cabinet framing and shelving built from extruded aluminum
2. Lightweight wood panel finishes
3. Cedar‑pine ceiling
4. All cabinetry bolted directly into the vehicle structure

Insulation consists of Havelock wool throughout, with supplemental rigid foam panels in larger flat sections.

Kitchen and Living Space

1. ICECO 70‑liter dual‑zone refrigerator and freezer (12V) [Brand New]
2. Large deep sink
3. 7 gallon fresh water container
4. 7 gallon gray water container
5. Three deep drawers for pantry, cookware, and dishes

Storage includes approximately 10 feet of continuous overhead cabinetry along the passenger side. There is also dedicated space for a porta potty if desired. Swivel front seats allow the cab to integrate into the living area.

Sleeping Area

1. Queen‑size bed with 6 inch thick mattress
2. Bed platform constructed from extruded aluminum with integrated channel design
3. Reading lights and hanging hooks for clothing and gear
4. Bench area that could potentially accommodate additional sleeping if needed

Water, Shower, and Cooking

1. Rear‑mounted gas‑powered outdoor shower
2. 20 gallon shower water tank
3. 7 gallon kitchen fresh water supply
4. Approximately 27 gallons total onboard water
5. Propane burner usable indoors or outdoors
6. Pop‑up exterior cooking table

Rear Garage and Gear Storage

The rear garage was designed around organized gear transport and quick access.

1. Dual heavy‑duty sliding trays
2. Bike tray configured for two bikes with front wheels removed
3. Tray converts to a ski or snowboard setup and has been used extensively at Ikon and Epic resorts
4. Gear tray for hoses, extension cords, emergency equipment, tools, tire chains, camping chairs, and awning components
5. LED lighting in the garage area
6. Multiple hooks for hanging gear and accessories

Ideal Use Cases

1. Four‑season travel
2. Off‑grid and dispersed camping
3. Mountain biking and ski trips
4. Remote work travel
5. Long‑term road travel and national park exploration

Located in Palo Alto, CA. Happy to answer questions for serious buyers.