A Class B motorhome — also called a camper van — is the most practical and versatile RV you can buy. Built on a standard cargo van chassis (Ram ProMaster, Ford Transit, Mercedes Sprinter), it drives like a large van, parks in a normal space, and gets real-world fuel economy around 18–22 MPG. Compared to larger Class A and Class C rigs, it's a different category entirely.
But buying one is a significant decision. New Class B vans range from $85,000 to $200,000+. Used market prices have normalized after the post-pandemic spike but quality varies wildly. This guide walks you through everything you need to know before signing anything.
What Is a Class B Motorhome?
Class B motorhomes are factory-built RVs constructed on a standard van chassis. The key distinction from custom van conversions (DIY or third-party) is that Class B units are built and certified by licensed RV manufacturers — Winnebago, Thor (Sequence, Compass), Roadtrek, Pleasure-Way, Airstream, and others — with standardized systems and manufacturer warranties.
What you get in a Class B:
- Fresh water tank (typically 20–30 gallons)
- Grey and black water tanks (10–20 gallons each)
- Propane system for cooking and sometimes heating
- Shore power hookups (30-amp standard)
- Battery bank (often upgradeable to lithium)
- Climate control (rooftop AC, diesel or propane heat)
- Kitchen with sink, cooktop, and sometimes oven or microwave
- Sleeping for 2 (sometimes 3–4 depending on floor plan)
- Bathroom (wet bath or cassette toilet, model dependent)
Class B vs. Class C vs. Class A: Which Is Right for You?
| Feature | Class B | Class C | Class A |
|---|---|---|---|
| Length | 18–24 ft | 20–35 ft | 26–45 ft |
| MPG | 18–22 | 8–14 | 6–12 |
| Sleeps | 2–4 | 4–8 | 4–10 |
| Starting Price (New) | $85K–$200K | $70K–$150K | $80K–$500K+ |
| Drives Like | Large van | Large truck | Bus |
| Campsite Flexibility | Excellent | Good | Limited |
| City parking | Possible | Difficult | Not practical |
If you're a couple or solo traveler who wants to move efficiently and camp in diverse locations, Class B is almost always the right call. For families of 4+ who need separate sleeping quarters, a Class C or fifth-wheel makes more sense.
Popular Class B Floor Plans
The Murphy Bed / Lounge Configuration
The most popular layout. A sofa or dinette converts to a bed at night, giving you a proper lounge space during the day. Best example: the Winnebago Travato 59KL (which we operate). The 59K has a permanent rear bed; the 59KL has a convertible dinette that sleeps up to three.
The Permanent Rear Bed
A fixed queen or king-ish bed at the rear. Easier setup (no conversion), but you lose dedicated lounge space. Popular with couples who prioritize sleep quality over daytime living space. Look at the Winnebago Travato 59K or Pleasure-Way Plateau for this layout.
The Loft / Cab-Over Bunk
Some Class Bs on extended chassis (24 ft+) offer a cab-over sleeping area above the cockpit, adding sleeping capacity without sacrificing rear living space. Less common in true Class B vans but appears in some Class B+ models.
The Wet Bath vs. Cassette Toilet
Full wet baths (toilet, sink, shower in one waterproof room) take up space but provide comfort. Cassette toilets are compact, portable, and common in European-style vans. Wet bath wins for extended camping; cassette is fine for weekend trips.
Key Systems to Evaluate Before Buying
Power: Lithium vs. AGM Batteries
Lithium (LiFePO4) batteries are worth every penny for serious off-grid use. They deliver usable capacity down to ~20% charge (vs. ~50% for AGM), charge faster, last longer (2,000–5,000 cycles vs. 200–500), and weigh less. Many new Class Bs come with AGM standard and offer lithium as an upgrade — take the upgrade if you plan to boondock.
Solar Capacity
100W of solar is barely enough to run a fan and charge phones. 200–400W is a realistic minimum for comfortable off-grid living. Some premium vans ship with 600W+. Check the roof layout — not all Class Bs have room to add panels post-purchase.
Chassis: Ram ProMaster vs. Ford Transit vs. Mercedes Sprinter
- Ram ProMaster: Most affordable, front-wheel drive (lower clearance), excellent for highway driving. Used on the Winnebago Travato. Service is widely available.
- Ford Transit: Rear-wheel drive, more ground clearance, widely serviced. Used on several Airstream and Thor models.
- Mercedes Sprinter: Best driving dynamics, diesel efficiency, more off-road capable versions available. Sprinter-specific service centers required — availability can be limited in rural areas.
Fresh & Waste Water Capacity
Bigger tanks mean more independence. A 26-gallon fresh tank (like the Travato's) lasts 2–4 days for two people with conservative use. If you want a week between fill-ups, look for 40+ gallons or plan to carry supplemental jugs.
HVAC: Rooftop AC vs. Diesel Heat
Rooftop AC requires shore power or a generator — you can't run it indefinitely on batteries. Diesel or propane heaters (Webasto, Espar, Truma) run independently on fuel and are far more efficient for cold-weather camping. For desert Southwest use, diesel heat is a bonus but AC capacity matters more.
Not Ready to Buy? Rent First.
We recommend renting before buying. A week in our Travato or Transcend will tell you more about what you actually need in a van than any spec sheet. See what's available.
New vs. Used: The Honest Assessment
Buying New
Pros: Full manufacturer warranty (typically 1-year coach, 3-year chassis), latest technology, known history, financing options. Cons: Significant depreciation in year one (15–25%), higher purchase price, often 6–12 month dealer wait times for popular models.
Buying Used
Pros: Lower entry price, someone else absorbed depreciation, can often get upgrades (lithium, solar) that were added by previous owner. Cons: Unknown maintenance history, potential deferred repairs, limited or no warranty, harder to finance at favorable rates.
What to look for in a used Class B:
- Water damage — check all seams, roof vents, and under sink cabinets with a moisture meter
- Battery health — check age and capacity, not just voltage
- Engine and chassis records — full service history is a green flag
- Tire age — tires degrade by age even with low mileage; replace anything over 5–6 years regardless of tread
- Appliance function — test every system (heat, AC, water pump, toilet, all burners)
- Frame and underbody corrosion — especially on northern-state used vehicles
Total Cost of Ownership
Sticker price is only part of the number. Before buying, budget for:
- Insurance: Class B RV insurance runs $800–$2,000/year depending on usage and coverage
- Registration & fees: Varies by state; Nevada registration on a $120K vehicle is several hundred dollars annually
- Storage: If you can't park it at home, indoor storage runs $200–$500/month in the Las Vegas area
- Maintenance: Chassis service every 5,000–7,500 miles, plus annual RV system checks
- Campground fees: $25–$60/night at developed campgrounds if you're not boondocking
- Fuel: At 20 MPG and $4/gallon, a 5,000-mile season costs roughly $1,000 in fuel
Should You Buy or Rent?
If you're camping more than 4–6 weeks per year and you've already done at least one rental trip, buying starts to make financial sense over a 5-year horizon. If you're camping 1–3 weeks a year, renting will almost always be cheaper when you factor in purchase price, depreciation, storage, insurance, and maintenance. No judgment either way — owning is about more than just the math for most people.