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Boxes + Storage
Compact Monster 30 van storage box made from lightweight, anti-corrosion aluminum with clamshell opening and built-in work table
Heavy-duty Owl Monster Box 30 van storage box mounted on vehicle rear for rugged adventure use
Open box Van Storage Box Monster 30 mounted on back of off-road van with spare tire.
Owl Monster Box 30 durable van storage box mounted on rear of adventure van with open lid
Open Box #7 Owl Monster 30 durable van storage box mounted on vehicle back door for off-grid adventure storage
Open box showing Owl Monster 30 van storage box installed on back of van with lid open
Owl Monster 30 van storage box with dimensions 24 by 30 inches designed for durable and high-performance van organization
Black Monster 30 van storage box mounted on a vehicle at sunset for outdoor adventure use
Van Storage Box Owl Monster 30 with durable, utility-focused design for adventure and overland setups comparison view
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Monster Box 30 Storage Box for Sprinter

$1,450
Upgrade Options:
B2: Sprinter Rear Door Cargo Carrier & Bike Rack (2019+)

The best-selling rear door carrier on the market—entirely re-imagined. Capable of carrying an industry-leading 200 pounds of gear, the new B2 now comes with a complete Sherpa hole and slot panel, and even more modular capability.

B2: Sprinter Rear Door Cargo Carrier & Bike Rack (2019+)  • $1,900
This Product Fits:

Mercedes Sprinter, Winnebago Ekko, Winnebago Revel, Storyteller Overland, Tiffin GH1, Thor Sanctuary & Tranquility, Jayco Terrain, Airstream, Ford Transit

In Stock - Ships within 1 week
  • Lightweight aluminum, not heavy steel
  • 6.6 cubic feet of storage
  • Built in the USA, not imported
  • 3 Year limited warranty from Owl
  • Adjustable shelf that can be moved up and down
  • Dual fold doors allow for maximum storage, bottom door acts as a table
  • Locking latches keep all your gear safe while on the trail
Click Here to Contact Owl's Team
Mini-Monster Box - Owl Vans

Monster Box 30 Overview

Use Cases

Rear Storage for Van Life & Overland Travel
Add secure, external storage for tools, recovery gear, camping equipment, and daily essentials, keeping your Mercedes-Benz Sprinter interior clean and organized for van life and long-distance travel.

Camp Kitchen & Mobile Workstation Setup
Integrated fold-down door and internal shelf create a convenient table and prep surface for cooking, gear organization, and campsite setup during overlanding and camping trips.

Gear Organization for Expedition & Off-Grid Builds
Perfect for storing recovery gear, spare parts, tools, and accessories needed for remote travel, trail repairs, and self-sufficient overland adventures.

Modular Storage & Accessory Mounting Platform
Designed to integrate with bike racks, gear mounts, and Owl accessory systems, allowing flexible setups for bikes, storage, and expedition equipment.

Daily Use, Travel & Easy Gear Access
Quick-access design makes it easy to grab gear, organize equipment, and use the box as a workspace whether you’re on the road, at camp, or prepping for your next adventure.

Black Monster 30 van storage box mounted on a vehicle at sunset for outdoor adventure use

Massive Size, Minimal Weight

The Owl Monster 30 is the perfect secondary storage space for any gear that's better left outside the van. With 6.65 cubic feet of internal storage, it's ideal for recovery gear, tools, dirty shoes, and even misbehaving children. (Please do not put children inside the box.) All of this storage space comes in at less than 60 pounds because of our lightweight, TIG-welded aluminum.

Heavy-duty Owl Monster Box 30 van storage box mounted on vehicle rear for rugged adventure use

Boxes - Manufactured in the USA

The OWL Monster series of boxes is designed and manufactured in the USA. We take enormous pride in supporting domestically made products, which allows us to control the build and finish quality of each piece. We are obsessive, so you are always ready.

Key Features

Dual Fold Doors
Built to maximize storage and surface area. The bottom door folds down to create a work space, while the top door is held securely with gas struts. Owl boxes are equipped with a slam latches for fast closing.
Modular Gear Plates
The front of the Monster Box 30 features Owl's signature hold and slot design making it easy to mount must-have trail accessories.
Versatile Mounting
The Monster Box 30 can mount to almost anything, but it is pre-drilled of the Owl B2/B2Pro. Locking latches keep all your gear safe, and prevent box removal.
Adjustable Shelf
Comes standard with one adjustable shelf that can be moved up or down. Additional shelves can be purchased separately.

Why Choose Owl: Boxes

Choosing the right exterior storage box for your Mercedes-Benz Sprinter or adventure vehicle affects storage capacity, weight, durability, organization, and long-term usability on the road.

Owl Main Competitor
Material Multi Gauge For Strength And Weight Simgle Gauge (Increased Weight)
Country of Origin USA China / Overseas
Weight 45/65Lbs 55/75Lbs
Powder Coat Dual Stage (Primer and Top Coat) Single Stage
Welds Robotic Unknown
Accessory Panel Yes No, Or Additional Cost
Bi-Fold Doors Yes No
Rust Proof Yes No
Warranty 3yr - 36k OR 4yr - 40k if installed by Owl Sold (as-is), No warranty
Servicing Support 6 Owl-Owned Retail & Service Locations No Service Locations
Customer Service Reps On Call Yes, at our HQ in Arizona No
Original Inventor Yes No

Owl cargo boxes are designed for van life, overlanding, and expedition travel where lightweight construction, durability, weather resistance, and modular functionality matter. From bi-fold door access and integrated accessory panels to robotic welding and rust-proof aluminum construction, the system is engineered for real-world travel, daily usability, and long-term reliability both on and off the road.

What Our Customers Say

Trust our Verified Reviews from Google. Read More.

Vehicle Compatibility

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Compatible with These Vehicles

View Compatibility +

This product is designed for 2019–present Mercedes-Benz Sprinter vans (VS30 platform), including the following configurations:
Sprinter 144" wheelbase
Sprinter 170" wheelbase
Sprinter 2500
Sprinter 3500 / 3500XD (where applicable)
Sprinter AWD (2023–present)
Sprinter 4x4 (2019–2022)

This product is compatible with most camper vans and adventure vans built on the 2019+ Sprinter platform, including popular models from Winnebago, Storyteller Overland, Thor Motor Coach, Airstream, and others.

Winnebago EKKO (Sprinter Platform):
- EKKO Sprinter 23B (2023–present)
- Mercedes-Benz Sprinter 3500 AWD (VS30) chassis

Compatible RV & upfitter platforms built on the Sprinter chassis include:

Winnebago Revel:
44C, 44E, 44N

Storyteller Overland:
Classic MODE, Stealth MODE, Beast MODE
144" High Roof AWD Sprinter builds
170" High Roof AWD Sprinter builds

Thor Motor Coach:
Tranquility: 19A, 19M, 19P, 24A, 24C
Sanctuary: 19A, 19L, 19M, 19P

Airstream:
Interstate 19GT / 19GTX / 19X
Interstate 24GT / 24GL / 24X

3500/4500 Cab Chassis:
Wayfair
Winnebago Navion
Winnebago View

3500 Dually Class B Vans:
Tiffin GT2
Winnebago Boldt

Other Platforms:
Tiffin GH1 (2025–present)
Jayco Terrain (2022–present)
Entegra Launch

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Not With These Vehicles

View Compatibility +

Ford Transit-based vans
Ram ProMaster-based vans
INEOS Grenadier
INEOS Quartermaster

RETURNS

We want you to be delighted with your Owl gear! We accept returns up to 30 days from the date of shipment. For more information, visit

Owl Warranty, Cancellations & Returns

CALIFORNA PROP 65

Some parts offered by Owl contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit

www.p65warnings.ca.gov