New 2025 Grand Design Solitude 378MBS Fifth Wheel

At the heart of this floorplan is the middle bunkhouse, a true multi-purpose room.
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2025 378MBS Features and Options

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NEW 2025 Grand Design Solitude Fifth Wheel 378MBS

Designed for families, remote workers, and extended stays, the 2025 Grand Design Solitude 378MBS blends residential luxury with flexible living space so you never have to compromise comfort for adventure. With a dedicated middle bunkhouse/office, dual power awnings, and a refined open-concept living area, this fifth wheel is built to adapt to the way you travel.

At the heart of this floorplan is the middle bunkhouse, a true multi-purpose room. It features a fold-down bunk above a tri-fold sofa, creating comfortable sleeping space while still functioning as a lounge or workspace. A built-in desk and closet make this room ideal for working remotely, homeschooling, or hosting guests without disrupting the rest of the coach.

Highlights and Key Features:

  • Middle bunkhouse with fold-down bunk, tri-fold sofa, desk, and closet

  • Spacious open living area with dual opposing slide-outs

  • Theatre seating and tri-fold sofa positioned for the LED Smart TV

  • Free-standing dinette for meals, work, or family game nights

  • Chef-inspired kitchen with large island and prep sink

  • Built-in oven, oversized pantry, and 20 cu. ft. refrigerator

  • Front private bedroom with queen bed slide (king optional)

  • Large wardrobe with washer/dryer prep

  • Two power awnings for extended outdoor living space

  • Exterior beverage cooler and outside griddle for easy entertaining

Built with Grand Design’s renowned quality, the Solitude 378MBS features 101" wide-body construction, heavy-duty 8,000 lb. axles, frameless tinted windows, and high-gloss gel coat sidewalls. Travel confidently in all seasons thanks to the Weather-Tek Package, which includes a 35,000 BTU high-capacity furnace, enclosed and heated utility center, and fully enclosed underbelly with heated tanks and storage.

Inside, residential details elevate the experience with hardwood cabinet doors, solid surface countertops, premium roller shades, and upscale finishes throughout. On the road, the MORryde CRE3000 suspension system, MORryde pin box, and self-adjusting brakes deliver a smooth, stable towing experience from driveway to destination.

 

Why Buy from Campers Inn RV:
Campers Inn RV is committed to helping you find the right fifth wheel for your lifestyle. With knowledgeable product specialists, competitive pricing, flexible financing options, and a nationwide service network, you can buy with confidence knowing support is always within reach.

Inventory/Stock Images may be shown. Colors and specifications may vary. Call our AMAZING TEAM for details.

What Our Customers Are Saying

Friendly Staff!

A lot of fun and friendly people work at this dealership and they took the stress out of the purchasing process. Our sales person was Kasey and my wife and I both loved her. She answered all our questions and was very straightforward about everything. I was also impressed with the candor of the two technicians they provided during the delivery process. They explained the camper to us and gave us a - Daniel
Price: $137,352
You Save: $52,375
Sale Price: $84,977
Campers Inn
Location: Tucson AZ
Stock# 21162058
To get help now on this RV, call and enter the RV ID if prompted.
RV ID: 3368379#
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2025 378MBS Specifications
Sleeps 7
Slides 4
Length 40 ft 2 in
Ext Width 8 ft 5 in
Ext Height 13 ft 5 in
Int Height 8 ft 1 in
Hitch Weight 2686 lbs
GVWR 18000 lbs
Dry Weight 14344 lbs
Fresh Water Capacity 81 gals
Grey Water Capacity 106 gals
Black Water Capacity 53 gals
Tire Size ST215/75R 17.5 LRH
Furnace BTU 35000 btu
Number Of Bunks 1
Available Beds Queen
Refrigerator Type 12V
Refrigerator Size 20 cu ft
Cooktop Burners 4
Number of Awnings 2
Axle Weight 8000 lbs
LP Tank Capacity 30 lbs.
Water Heater Type Tankless On Demand
AC BTU 30000 btu
TV Info LR LED Smart TV
Awning Info 20' and 11' Power w/Integrated LED Lighting
Axle Count 2
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Shower w/Seat
Electrical Service 50 amp
VIN 573FS4226SAA19588
For more information Contact Us

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Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.