For Sale: Custom 2021 Ram Promaster 3500 Off-Grid Camper Van – 159” EXT – Only 6,000 Miles
Step into full-time vanlife or elevate your weekend escapes with this meticulously built 2021 Ram Promaster 3500 159″ Extended camper van. With just 6,000 miles and a top-tier off-grid electrical system, this van blends rugged reliability, smart design, and modern comfort. No shortcuts taken — just high-end materials and meticulously installed systems designed for year-round travel and self-sufficiency.
Vehicle & Driving Features
- 2021 Ram Promaster 3500 | 159” Extended Wheelbase
 - Only 6,000 miles
 - Power folding & heated mirrors
 - Swivel heated driver and passenger seats
 - Overhead storage cubby
 - Backup camera, cruise control, navigation, and remote start
 - Factory windows (rear doors + sliding door)
 - Arctic Tern dual-pane awning window w/ integrated blackout shades & screens
 - Custom magnetic insulated window covers
 - Trailer Hitch
 - Sumo Springs front and rear
 
Electrical & Off-Grid Power
- 630Ah Lithionics lithium battery system with external BMS
 - 3000W Victron inverter/charger
 - 340W Zamp solar panels with Victron MPPT charge controller
 - 50A Victron DC-to-DC charger
 - Nations high-output alternator
 - 30A shore power connection
 - Blue Sea Systems:
 - 8-position AC breaker panel
 - 12-circuit DC fuse block
 - Dimmable LED lighting throughout
 
Climate Control & Insulation
- Webasto gasoline air heater
 - 12,000 BTU 12V DC rooftop air conditioner
 - Maxxair roof fan
 - Multi-layer insulation:
 - 3/8” foil-laminated closed-cell foam
 - 3M Thinsulate for sound and thermal insulation
 
Water & Plumbing
- 26-gallon fresh water tank
 - 27-gallon gray water tank
 - 12V water pump + pressurized accumulator tank
 - 6-gallon Isotemp electric water heater with heat exchanger from engine coolant
 - PEX plumbing throughout
 - Heated outdoor shower at rear
 
Bathroom – Wet Bath Setup
- Thetford 3402C RV Cassette Toilet with:
 - Push-button electric flush
 - LED waste tank level indicator
 - Integrated no-splash pour spout
 - 5.1-gallon wheeled cassette tank
 - Icon shower pan with removable Teak wood floor
 - European-style shower valves + shut-off shower head
 - Nautilus retractable shower door
 - Enclosed dry toilet paper dispenser
 
Kitchen & Dining
- True Induction cooktop (single burner)
 - 1.0 cu ft stainless steel microwave
 - Large Ruvati stainless sink with integrated cutting board
 - Pull-out sprayer faucet
 - Vitrifrigo Slim refrigerator
 - Removable Lagun table mount for dining or work
 
Interior & Build Quality
- Fixed twin beds (30” x 74” x 6” memory foam mattresses)
 - Under-bed storage with easy access
 - 80/20 T-slot aluminum framing for cabinetry
 - Prefinished cabinet-grade maple fronts
 - Full-extension drawer slides & gas strut supports on upper cabinets
 - Foam-backed marine vinyl headliner
 - Automotive tweed wall coverings
 - LED reading lights & USB ports above each bed
 - Mesh pockets for phone storage
 
Exterior
- 13’ manual Fiamma awning – durable and easy to deploy
 - Sleek, stealthy, and adventure-ready profile
 
This van is designed for serious travel and comfort without compromising on utility or aesthetics. Ideal for someone who wants a truly turnkey off-grid rig with no corners cut. Ready for your next journey – whether it’s a national park tour, ski-season basecamp, or full-time living.
Clean title in hand. Serious inquiries only.