Converting a cargo trailer into a livable, off-grid home is an adventure unlike any other. A cargo trailer conversion a journey that combines creativity, perseverance, and a deep love for freedom and exploration. Eric and I took on the project of transforming a 7×14 cargo trailer into a fully functional, off-grid tiny home during the pandemic. We now live full-time with our two dogs in the home we built and have been traveling across North America in it for over a year.
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Table of Contents
The Build Process: From Concept to Fully Functional Home on Wheels
Why We Decided to Convert a Cargo Trailer
Our decision to convert a cargo trailer into a tiny home was born during the pandemic. We really loved following the vanlife influencers and dreamed of pursuing a similar lifestyle. A cargo trailer conversion was very intriguing to us as we really loved the flexibility and customization that came with it. We wanted something that could handle the rugged terrains of our adventures while still providing the comforts of home.
Why not a traditional RV or van?
Our first thought was converting a van. We put hours of research into it but eventually came to the conclusion that a van would not quite fit our needs. Vans offer less space while being much more expensive leaving less of the budget for the renovation.
Traditional RVs, though convenient, felt too limiting and impersonal. It was clear to us from the beginning that we wanted to build something custom. Doing all the planning, design and work ourselves allowed us to allocate our budget towards features and materials that mattered most to us, rather than paying for a one-size-fits-all solution.
When we came up with the idea of a cargo trailer conversion, we were hooked right away. Being able to order the trailer right at the manufacturer, getting windows placed exactly where we wanted them and customizing inner height were key factors in our decision. A cargo trailer offered us an affordable blank canvas, allowing us to design a space that perfectly suited our needs and lifestyle
The Planning Phase of Our Cargo Trailer Conversion
Floorplan for a 7×14 Cargo Trailer Conversion
Before we could dive into the hands-on work of converting a cargo trailer into a camper, we needed to establish a clear vision of what we wanted. This involved countless hours of research, 3D modeling, and debating over design ideas. It was important to us to develop the floorplan for our cargo trailer conversion before ordering the custom trailer.
We knew that our trailer needed to be functional, comfortable, and durable enough to withstand the elements. Our must-haves included a sleeping area, a kitchenette, plenty of storage, and a cozy space to relax. We designed the entire trailer in SketchUp first. This allowed us to visualize the space, come up with the ideal dimensions of the cargo trailer and plan exactly how much building material we needed.
Budgeting for the Cargo Trailer Conversion
Budgeting was a crucial step in the planning process. We had about $30,000 that were were willing to spend on converting the cargo trailer into a camper, so every decision had to be made with cost in mind. We listed out all potential expenses, from the purchase of the trailer over the battery bank to the plumbing fittings. This not only helped us stay on track financially but also offered us the opportunity to buy long lead time items ahead of schedule.
Selecting the Perfect Trailer
We found a manufacturer that allowed us to customize the size, shape, color, window and door placement, axles, and some other minor features. We pretty quickly settled on a 7×14 v-nose cargo trailer. This size struck the perfect balance between providing enough space for our needs and remaining easy to tow. The v-nose provided additional interior space without adding to the overall length.
The inner height was determined based on the height of the bed: we wanted to be able to comfortably sit upright on the bed while there would be enough space underneath the bed to store our mountain bikes. Similarly, the placement of the windows and doors was based on the interior layout we came up with. To make the trailer more rugged, we opted for torsion axles.
Our DIY Cargo Trailer Conversion: Step-by-Step
Insulation and Weatherproofing
The first major step in the conversion was insulation. We chose havelock wool (sheep’s wool) insulation for its excellent thermal properties, moisture resistance and ease of installation. We added an extra layer of aluminum to the bottom of the trailer to better protect it from underneath and also create additional usable space between the floor joists for insulation. Insulating the walls, ceiling, and floor was essential for keeping the trailer warm in cold weather and cool during the summer. As havelock wool is difficult for overhead work, we chose 3M Thinsulate to insulate the ceiling, it has an excellent R-value but is a slightly more expensive option.
Electrical System Setup
Installing the electrical system was one of the more challenging aspects of the conversion. Eric was an aircraft mechanic in the Air Force, so had some experience with electrical work but our main education came from YouTube. It was important to us to be energy self-sufficient. So, naturally, we opted for a solar power setup. All details on the electrical system can be read further below.
Plumbing
Our plumbing system contains of a large freshwater tank that we placed underneath our bed, a 12v water pump, a 4-gallon electric water heater, a filter system for our drinking water, our kitchen sink and shower and two 8 gallon grey water tanks that we mounted in the insulated part of the floor. Since we opted for a composting toilet, we do not have a black water system.
Building the Furniture
Building the furniture was where the project really started to take shape. We designed and built a multifunctional bed frame that includes ample storage underneath. The kitchenette was another key component, equipped with a sink, a portable stove, and counter space for food preparation. We also added a seating area with hidden storage, making sure that every inch of space was utilized efficiently.
Personal Touches and Decoration
Finally, we added the personal touches that made the trailer truly ours. We installed blinds, hung up curtains, and chose soft furnishings that made the space cozy and inviting. We also organized our camping gear in a way that kept everything accessible yet out of sight, maintaining a clutter-free environment.
Challenges We Encountered During the Cargo Trailer Conversion
Space Constraints
Working within the limited space of a cargo trailer posed several challenges. We had to be extremely mindful of how every inch was used. To overcome this, we focused on multifunctional furniture and creative storage solutions. The space between the bathroom wall, for example, contains small shelves and baskets for additional storage.
Electrical Work
As mentioned earlier, the electrical system was a bit of a challenge. Since airplane electronics are not the same as a solar setup for a camper, we found ourselves constantly researching, watching YouTube tutorials, and occasionally seeking advice from more knowledgeable friends. We had a few trial and errors in wiring everything up as well as made a few upgrades to our initial design along the way. This learning curve was steep, but the end result – a fully functional off-grid power system – was worth the effort.
Maintaining Momentum
Like any DIY project, there were times when the sheer scope of the work felt overwhelming. To keep momentum, we broke the project down into smaller tasks and set achievable goals for each week. This approach helped us stay focused and motivated, even when progress seemed slow. We also posted our progress on social media which helped us with accountability.
Tiny Home Tour: Our Cargo Trailer Conversion
Our Bedroom: Cozy Functionality
Our cargo trailer is more than just a camper – it’s our home. Stepping inside, the first thing you notice is the spaciousness, despite the compact size. We opted for a king-size bed, not only for comfort but also because our two large dogs like to sleep in bed with us. Our bed is fixed, which means we cannot convert it into a dining area or additional living space. While a fixed setup reduces the multifunctionality of the living space, we love not having to convert our bed in the mornings and evenings. The bed sits atop a platform and underneath are our water tank, battery bank, and additional storage for tools and outdoor gear. This setup maximizes our usable space and storage while keeping everything organized.
We have a small set of overhead cabinets above the bedroom window, which allows for additional storage. Our bed also doubles as a small office setup. Since Senta works full-time on the road, having a dedicated workspace was essential. We have a foldable, portable lap desk, which allows Senta to work from bed or at our extendable table downstairs.
Lighting is crucial in such a small space, so we installed 12-volt reading lights on either side of the bed, complete with USB chargers for our devices. A MaxxAir fan above the bed ensures good airflow, making the space feel airy and fresh. We also installed a bedroom window, which is perfect for catching a cool breeze.
The Kitchen: Compact Yet Practical Design
Our kitchen may be small, but it’s mighty. We prioritized functionality, ensuring that we have everything we need to cook and store food efficiently. The pull-out table in the kitchen doubles as extra counter space, making meal prep a breeze.
One of our favorite kitchen features is the flip-up countertop. This simple addition has significantly increased our workspace, allowing us to prepare meals without feeling cramped. The sink, equipped with a custom cutting board cover, further extends our counter space. Below the sink, we keep dog food and other miscellaneous items, making the most of every inch.
Above the counter, we installed overhead cabinets for our pots, pans, and food storage. We also have a hidden pantry that holds our spice rack and other kitchen essentials. Despite the limited space, we’ve managed to create a kitchen that rivals those in much larger homes.
Living Area: Cozy and Versatile
The living area is the heart of our tiny home, designed with comfort and versatility in mind. We added a flip-up counter extension in the kitchen that doubles as a third seat when needed. Together with our extendable bench seating we can comfortably fit three people around our table. This bench also serves as a cozy cave. Maple loves to retreat in there when she needs a break from her sister. And lastly, the bench can also serve as a guest bed, even though we haven’t had the chance to test it out yet.
We use a pull-out butcher block table that was installed onto 400lbs drawer slides. Below and above the table, we installed a set of drawers. Here we store clothes, dog supplies, and kitchen essentials like plates, bowls, and a portable induction cooktop.
To maximize space, we installed a laundry chute and hidden trash compartment under the bench. These small touches have made a big difference in keeping our home tidy and functional.
Bathroom with Toilet and Shower
Our living area also includes a full bathroom with a spacious shower, a composting toilet, and plenty of storage. We chose to place the bathroom in the V-nose of the trailer, which gave us more room for the shower and allowed us to make the most of the trailer’s unique shape. The barn doors add a touch of rustic charm while providing privacy.
The Exterior: Practical and Beautiful
The exterior of our trailer is just as important as the interior. We designed it to be both functional and aesthetically pleasing. The back of the trailer opens up to reveal our garage, where we store our bikes, kerosene heater, and additional water tanks.
One of our favorite features of the trailer is the ramp, which doubles as a patio. We often use this space to relax, do yoga, or simply enjoy the view. The open back of the trailer allows us to feel connected to nature, even when we’re inside.
To personalize the exterior further, we added a forest and mountain decal to the side of our trailer and we add stickers of our travels to the back.
Technical Details
Electric System: The Power Behind Our Off-Grid Lifestyle
Our Solar System and Battery Bank
Living off-grid requires a reliable power system, and we spared no expense in this area. Our solar setup includes 990 watts of panels, which charge our 800 amp-hour lithium iron phosphate battery bank. This system powers everything in our home, from the air conditioning to the water heater. We also have a small portable power station that we use to charge laptops and other small devices, ensuring we always have power when we need it.
The controls for our electrical system are conveniently located in the kitchen. We can monitor our battery levels, turn on the inverter, and control the air conditioning and MaxxAir fan with ease. Our lights run on a 12-volt system, with switches strategically placed throughout the trailer. We even installed magnetic under-cabinet lighting to brighten up the kitchen and garage, making it easier to find what we need.
Powering an A/C System with Solar Only
One of the standout features of our build is the mini-split air conditioning unit. Mounted on the outside of the trailer, it keeps our home cool even in the hottest conditions. We decided to install this unit primarily for our dogs, ensuring they remain comfortable in a temperature-controlled environment when we’re away. To support this, we installed our beefy electrical system, which allows us to run the AC and other appliances without worrying about power in almost any weather condition.
Connectivity Through Starlink
One of the challenges of living off-grid is maintaining a steady internet connection, which is essential for Senta’s work. We use Starlink for our primary internet service, which has been reliable even in remote locations. As a backup, we have a Verizon hotspot that ensures we stay connected, no matter where we are.
Plumbing System: Water Is Life
Our plumbing system is designed for efficiency and sustainability in our off-grid lifestyle. We have a 42-gallon fresh water tank stored in the garage, which supplies water to our sink and shower. The system includes a 4-gallon electric water heater, providing hot water on demand. For waste, we utilize a 16-gallon gray water tank mounted underneath the trailer, with an additional 6-gallon portable gray water tank for extended stays.
The system is entirely electric, eliminating the need for propane, and is powered by our robust solar and battery setup. The electric water heater is a big power draw, so, in less-then-ideal solar conditions, we choose to keep it turned off and take hot showers at Planet Fitness instead.
Tips for Your Own DIY Cargo Trailer Conversion
If you’re considering a DIY cargo trailer conversion, here are some tips based on our experience:
Start with a Clear Plan
Having a clear plan from the start is essential. This includes not only the layout and design but also a detailed budget and timeline. Knowing exactly what you want to achieve will guide your decisions throughout the project.
Be Willing to Learn
Don’t be discouraged if you don’t have experience in certain areas, like electrical work or carpentry. There are countless resources available—online tutorials, forums, and even local workshops—that can help you gain the skills you need. The learning process is part of the adventure.
Embrace Flexibility
Things won’t always go according to plan, and that’s okay. Stay flexible and be willing to adapt your design or timeline as needed. This will help you navigate any unexpected challenges that arise during the conversion.
FAQs – Frequently Asked Questions About Our Cargo Trailer Conversion
What materials did you use for insulation?
We used havelock sheep’s wool due to its excellent thermal properties, great moisture resistance and ease of installation. It was applied to the walls and floor to keep the trailer comfortable in all weather conditions. In the ceiling we used 3M Thinsulate as it was thinner and easier to install overhead.
How did you handle the electrical system installation?
We installed a solar power system with the help of online tutorials and advice from friends. The system includes:
3×330 watt solar panels
A Victron MPPT 150/100 Charge Controller
4x 200AH LiFePo4 batteries
A Powermax 60A Converter Charger
A 4000 Watts Pure Sine Wave Inverter from OLTEANP
What challenges did you face with space constraints?
Space was a significant challenge, but we overcame it by using multifunctional furniture and creative storage solutions. Every inch of the trailer is utilized efficiently to ensure comfort and functionality.
How much did the entire cargo trailer conversion cost?
The total cost of the conversion was around $30,000. This included the trailer, materials, tools, electrical equipment, decoration, etc.
What is the weight of the converted cargo trailer camper?
Our fully-loaded trailer weight is at around 5,800 lbs. Towing the trailer is pretty straightforward, thanks to its manageable size. We made sure our vehicle was capable of safely towing the trailer before we started the building process.
How long did the cargo trailer conversion take?
The cargo trailer conversion took us approximately nine months, working primarily on weekends and evenings as we both had full-time jobs at that time.
Conclusion: The Joy of Living Off-Grid
Converting a cargo trailer into a tiny home was a challenging but incredibly rewarding experience. We’ve created a space that is not only functional but also reflects our values and lifestyle. Living off-grid has given us the freedom to explore new places while enjoying the comforts of home.
If you’re interested in how we usually find free, off-grid campsite with epic backdrops, check out this article: How We Find Epic Free Campsites: A Guide for Thrifty Travelers
Whether you’re dreaming of long-term travel or just weekend getaways, a DIY cargo trailer conversion could be the perfect solution for you. With careful planning, a willingness to learn, and a little creativity, you can transform an ordinary trailer into an extraordinary home on wheels. As we continue our journey, we’re constantly learning and adapting to life on the road. This lifestyle isn’t for everyone, but for us, it’s the perfect way to live. We’re grateful for the opportunity to share our experience and hope it inspires others to consider the possibilities of tiny living and off-grid adventures.
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