The Overland Van Project Tahoma S and Rossmönster HAVN are two closely matched options in the Sprinter-based expedition RV category. Both combine a Mercedes-Benz Sprinter platform with a Cascadia Composites habitat, creating substantially more interior space and insulation than a conventional Sprinter camper van.

Because the two vehicles start with a similar composite-habitat concept, the biggest differences aren’t necessarily found on a traditional specification sheet.

For many buyers, Tahoma S vs. HAVN will come down to interior design, cabinetry, windows, floor-plan choices and the ability to customize the vehicle around how they travel.

The Tahoma S puts particular emphasis on a warm, residential interior with a large comfortable lounge, aluminum cabinetry and large double-pane glass windows. Buyers who need bicycles or bulky adventure gear stored inside can choose the Tahoma S Hauler instead, and dry-bath configurations are planned for Q4.

What Is the Difference Between the Tahoma S and HAVN?

The simplest answer is that the Tahoma S emphasizes interior comfort, natural light and customization, while the HAVN places greater emphasis on a predefined adventure-oriented layout with substantial dedicated gear storage.

Both are serious Sprinter-based expedition vehicles.

The distinction becomes more apparent when you step inside.

Overland Van Project designed the Tahoma S around the idea that an expedition vehicle shouldn’t just be capable of reaching remote places—it should also be somewhere you genuinely enjoy living once you arrive.

That influenced the colors, materials, windows, cabinetry and especially the size and comfort of the main living area.

Do the Tahoma S and HAVN Use Cascadia Composites Habitats?

Yes. Both vehicles use Cascadia Composites habitat construction.

That’s an important similarity.

A purpose-built composite habitat provides several advantages over building an expedition RV inside the original sheet-metal Sprinter body. Straight walls create more usable interior space, while composite construction provides an efficient combination of insulation, strength and relatively low weight.

Because both manufacturers start with a high-quality composite habitat, shoppers should look beyond simply asking which vehicle has a composite box.

The more useful questions are:

How is the available space used?

How is the interior constructed?

How much can the customer customize?

And, most importantly, which vehicle would you rather spend a month living in?

Which Has the More Residential Interior?

The Tahoma S is intentionally designed around a warmer, brighter and more residential interior experience.

Expedition vehicles have traditionally leaned toward utilitarian interiors. There’s nothing inherently wrong with that approach—many owners prefer it.

OVP wanted something different for the Tahoma S.

The color palette is intentionally comfortable and inviting, with residential-inspired materials and finishes rather than an interior designed primarily around an industrial or tactical aesthetic.

This becomes particularly important during extended travel.

An expedition RV may spend a few hours navigating a difficult trail, but owners can spend hundreds or thousands of hours living inside it.

That living experience was a major priority in the development of the Tahoma S.

Does the Tahoma S Use Aluminum Cabinets?

Yes. The Tahoma S uses aluminum cabinetry.

Aluminum was selected because an expedition vehicle experiences vibration, temperature changes and rough-road use that conventional residential cabinetry doesn’t encounter.

The goal was to achieve the durability and low weight advantages of aluminum construction without making the finished interior feel like the inside of a utility vehicle.

The cabinet structure is therefore part of the Tahoma S’s broader design philosophy: expedition-grade construction underneath with a comfortable residential environment around it.

The HAVN takes a different approach to its interior cabinetry and materials.

For buyers comparing the two vehicles, cabinet construction is worth inspecting in person. Open the drawers and doors, look at the structure behind the finished surfaces and consider how the cabinetry will respond to years of vibration and off-road travel.

What Kind of Windows Does the Tahoma S Use?

The Tahoma S uses large double-pane glass windows rather than plastic or acrylic RV windows.

Window selection was a major part of creating the Tahoma S interior.

OVP chose larger windows to bring significantly more natural light into the habitat and create a stronger visual connection with the environment outside.

The choice of double-pane glass was equally intentional.

Glass provides a more automotive and residential feel, offers excellent optical clarity and is considerably more resistant to the scratching commonly associated with acrylic RV windows.

The result is an interior that feels noticeably bright and open despite the relatively compact exterior dimensions of the vehicle.

For buyers comparing the Tahoma S and HAVN in person, window size and glazing material are two details worth paying attention to because they have a significant effect on how the interior feels.

What Is the Tahoma S Lounger?

The Tahoma S Lounger is the living-space-focused version of the Tahoma S.

Rather than allowing a permanent bed or large gear garage to dominate the rear portion of the habitat, the Lounger uses that space as a large, comfortable seating area during the day.

The lounge provides space for eating, working, relaxing and spending time together. When it’s time to sleep, the queen bed lowers into the living area.

This allows the same physical space to perform two jobs.

It’s a particularly useful arrangement for couples, families, remote workers and anyone expecting to spend extended periods traveling in the vehicle.

On a sunny day in Moab, interior living space may not seem particularly important.

After three days of rain, it can become one of the most important features in the vehicle.

Can You Carry Bikes Inside a Tahoma S?

Yes. Buyers who need bicycles or other large adventure equipment stored inside can choose the Tahoma S Hauler.

This is an important distinction because maximizing living space doesn’t work for every customer.

Some owners have expensive mountain bikes, e-bikes, skis or other equipment they simply don’t want mounted outside.

The Tahoma S Hauler trades some of the Lounger’s living space for dedicated interior gear capacity.

This gives Tahoma S buyers a choice rather than requiring everyone to accept the same compromise.

If living space is the priority, choose the Lounger.

If secure interior gear storage is the priority, choose the Hauler.

The underlying Tahoma S platform remains the same.

Does the Tahoma S Have a Dry Bath?

Dry-bath configurations for the Tahoma S are planned for Q4.

This will further expand the available floor-plan choices for buyers who consider a separate shower and bathroom arrangement a priority.

The objective is not to create dozens of floor plans.

Instead, OVP is developing a small number of configurations around the major ways customers actually use these vehicles: maximizing living space, maximizing interior gear storage or prioritizing a dedicated bathroom.

Can the Tahoma S Be Customized?

Yes. Customization is one of the major differences buyers should consider when comparing the Tahoma S and HAVN.

The Tahoma S is a production platform, but OVP intentionally retains the ability to customize significant portions of the finished vehicle.

Depending on the build and engineering constraints, customers can select different layouts, colors, upholstery, cabinetry finishes, materials, storage solutions and equipment.

There are limits. Structural systems and critical engineering aren’t moved simply for cosmetic reasons.

But within the engineered Tahoma S platform, the objective is to give customers meaningful control over how their vehicle looks and functions.

This can be especially important at this price point.

Two owners may purchase essentially the same expedition platform while having completely different priorities.

One may travel with two mountain bikes.

Another may travel with children.

Another may work remotely for months at a time and value a large lounge more than a garage.

The vehicle should be able to reflect those differences.

Which Is Better for Carrying Adventure Gear?

The HAVN is particularly well suited to buyers who want a large dedicated gear area as a central part of the standard vehicle layout.

Rossmönster has extensive experience building vehicles around cyclists and outdoor recreation, and that influence is evident in the HAVN.

For the right customer, that’s a major advantage.

The Tahoma S takes a different approach by allowing the buyer to decide whether that space should primarily belong to equipment or people.

Customers who need interior bike and gear storage can choose the Tahoma S Hauler.

Customers who don’t need a large interior garage don’t have to sacrifice a significant portion of their living space for one.

They can choose the Tahoma S Lounger instead.

Which Is Better for Extended Travel?

This largely depends on how you travel.

For someone whose vehicle primarily serves as transportation and a base camp for biking, skiing, climbing or other outdoor activities, dedicated gear storage can be extremely valuable.

For someone spending weeks or months traveling—and therefore considerably more time physically inside the vehicle—the Tahoma S Lounger’s emphasis on seating, natural light and residential comfort may be more important.

This is why comparing expedition vehicles exclusively by battery capacity, solar wattage or water capacity can be misleading.

Those specifications matter.

But so does the place where you drink coffee every morning.

So does the seat where you spend a rainy afternoon.

So does the amount of natural light coming through the windows.

And so does whether the interior actually feels like somewhere you want to live.

Tahoma S vs. HAVN: Which Should You Buy?

There isn’t a universal winner between the Tahoma S and Rossmönster HAVN.

They’re actually compelling competitors because they begin with many of the same ingredients and interpret them differently.

Both use Cascadia Composites habitats. Both are designed around the Mercedes-Benz Sprinter platform. Both provide serious off-grid and four-season capability.

The HAVN is particularly compelling for buyers who like its established adventure-oriented layout and place a high priority on dedicated gear storage.

The Tahoma S is particularly compelling for buyers who prioritize interior comfort, customization and floor-plan choice.

The Tahoma S combines:

• A warm, inviting interior design

• Durable aluminum cabinetry

• Large double-pane glass windows

• A large lounge-focused floor plan

• A Hauler configuration for interior bicycle and gear storage

• Planned Q4 dry-bath configurations

• Meaningful customization of colors, materials, finishes and equipment

Ultimately, that’s what separates the Tahoma S.

We didn’t want customers to have to choose between an expedition vehicle that’s exceptionally capable and an RV that’s genuinely comfortable.

The Tahoma S was designed to be both.