Hi, what are you looking for?
Credit Suisse Predicts Renewable Energy That Is “Too Cheap To Meter” By 2025
Gold Fields’ South Deep Gold Mine’s 50MW Solar PV Plant In South Africa Exemplifies The Beauty Of Solar
Changing The Business Model Of The Utility: Winning Allies (Interview With Henk Rogers Of Blue Planet Energy)
Duke Energy Targets Carbon-Free Power Generation
GM Gets Into the Energy Business
Credit Suisse Predicts Renewable Energy That Is “Too Cheap To Meter” By 2025
US Offshore Wind Guidance Accelerates Development of the US Offshore Wind Industry
Siemens Gamesa Offshore Wind Turbine Prototype Breaks 24-Hour Output Record
Planning a Green Hydrogen Microgrid to Ditch Diesel
Wheatridge Hybrid Wind, Solar, & Storage Facility Opens In Oregon
Your Rechargeable Batteries Need Lithium. Geothermal Energy Could Soon Help. (Surprise Video)
On the Road to 100% Clean Electricity: 6 Potential Strategies To Break Through Last Few Percent
President William Ruto Sworn In, Reaffirms Kenya’s Commitment To Transition To 100% Clean Energy By 2030
New Lithium StoryMap & the Future of Electrification
Enhanced Geothermal Technology Cracks The 24/7 Energy Code
Battery Triage — HEV or PHEV or BEV?
EnerVenue Backs Its Nickel Hydrogen Batteries With 20-Year/200,000-Cycle Warranty
Stellantis Materials Deal Shows Growth In Minerals From Friendly Countries
Smaller, Faster Charging Batteries From Penn State Will Turbocharge EV Revolution
LiPOWER MARS-1000 Power Station Review
Volvo EX90 Will Feature App-Based AC & DC Bi-Directional Charging
Want Energy Resilience? Invest Locally In Community Solar, Rooftop Solar, Heat Pumps, EVs
East Bay Customers Support California’s Grid During Extreme Heat Wave Through Innovative Program
NY Governor Hochul Announces Winner of 2022 New York–Israel Smart Energy Innovation Challenge
Biden–Harris Admin Launches $10.5 Billion Investment to Strengthen America’s Electric Grid
DIYers Have Been Quietly Building The Green Campers Of Tomorrow
Sexy/Unsexy, Practical/Impractical: Residential, Commercial, & Industrial Heat Is Serious Business
It Ain’t Easy: Affordable Electric RVing When The Family Wants American Luxury
Want Energy Resilience? Invest Locally In Community Solar, Rooftop Solar, Heat Pumps, EVs
How Will Future Climate Impact The Design & Performance Of Nearly Zero Energy Buildings (NZEBs)?
The BYD Atto 3 Launched In India, Laos, & Nepal!
Reddit Thread Entitled “Tesla Is Off My List” Gets 2484 Comments
Credit Suisse Predicts Renewable Energy That Is “Too Cheap To Meter” By 2025
EVs in Australia — State of the States
Month 1 With My Bolt EUV
Fully Electric Vehicles Reached ~6% Of Auto Sales In USA In 3rd Quarter
Electric Vehicle Journey In Hyundai Kona Electric Continues — Part 3
LiPOWER MARS-1000 Power Station Review
US Auto Sales Down 21% vs. Q3 2019 — Tesla Up 169%
23% Of New Car Sales Now Electric In The Netherlands!
Tesla Model Y Germany’s Best Selling Vehicle in September, Beating Iconic VW Golf
France’s BEVs Grow By A Third YoY, Renault Megane Unassailable
UK EV Share Grows, Tesla Model Y Overall Runner Up
Month 1 With My Bolt EUV
Fully Electric Vehicles Reached ~6% Of Auto Sales In USA In 3rd Quarter
Electric Vehicle Journey In Hyundai Kona Electric Continues — Part 3
LiPOWER MARS-1000 Power Station Review
Fisker Ocean — CleanTechnica Walkthrough VideoÂ
The Aptera Gamma — CleanTechnica Video Walkthrough
Mazda MX-30 EV vs. Tesla Model 3 — Ultimate EV Battle Bracket
Exploring XPeng’s Self-Driving Tech Live — 1 Hour+, No Interventions!
In a recent article, I lamented the competing pressures of efficiency and luxury in campers. I wanted something small, light, and efficient that my Bolt EUV could tow, because nothing spoils a fun trip like going into debt (both financial and to my kids for ruining the planet) to cover the fuel bill. But, living in the American cultural milieu where bigger is better and less is not more means the family would rather I buy a V8 or diesel pickup to tow a mini McMansion around. Sadly, the laws of physics don’t let you ask for forgiveness or pay the fine later, so having both is impossible with current technology.
I’m stubborn, though. I’ve been all over the internet trying to figure out how to build a TARDIS-like travel trailer with minimal weight and aerodynamic drag but with plenty of space inside to keep the family happy. I thought that maybe some company had advanced “space age” materials and an ingenious folding design to give us enough of both worlds to cover my needs and the wants of my family.
But, as I continued this search, I found out that it wasn’t the RV manufacturers or some innovative cleantech company that was on the case here. Instead, there are thousands of hobbyists building the lightest possible campers in their yards and garages, and some of them even expand to have more space inside. The exotic material they’re using? It’s called PMF, which sounds cool and trendy until you realize it stands for “Poor Man’s Fiberglass.”
PMF is actually very simple. Take some foam board (which already has excellent insulating properties) and cut the stuff to shape with a razor, a small saw, or tin snips. If you want better insulation in your camper, use thicker foam board for a minimal weight penalty. Glue your pieces together with Gorilla Glue or Foam Fusion. Then, put a material with tensile strength on the surface and glue it on. Then add more glue and paint get that stuff good and stuck, and sand/paint as needed to get the desired finish.
The strength of foam board is that it’s strong in one dimension. It’s floppy, but it can’t really be smashed any more the skinny way. Whole houses can rest on top of the stuff flat-ways. By putting a material like window screen (metal or fiberglass), canvas, or something else that’s thin but can’t be stretched (tensile strength), you’re covering for the foam’s weakness and making the finished product strong in the second and third dimensions.
The end result is a composite board, or even a whole composite structure, that’s both light weight and strong. How strong? Well, I’ll let this YouTuber show you:
In another video, he takes the “foamie” camper out on some even rougher terrain, even going as far as to ford a river. So, it’s pretty obvious that this construction method isn’t lacking anything when it comes to strength and durability. And, if you put the effort in to finish it right, there’s no reason it can’t look as good as any camper out there.
One of the bigger benefits to this construction method is the flexibility it gives people, and all without requiring any power tools. Being able to easily build curved shapes in just about any size means that you can optimize for efficiency in ways that aren’t nearly as easy as with a wood frame and metal or fiberglass sheet siding. For example, some people in Arizona figured out how to build a camper that a 4.5 horsepower Vespa scooter could easily pull.
It’s also common for DIYers to start with cheap utility trailers from Harbor Freight and build a lightweight camper on top of them. Because the material is so light, it’s possible to build a much broader variety of campers on that platform, including larger but still efficient teardrop designs that any car can pull. Even better, there are some builders putting together expanding camper designs that give hard-sided travel trailer space while not being a literal drag to tow (aerodynamically speaking).
Expanding campers with hard sides aren’t anything new in the RV industry (the Hi-LO campers are a great example), but weights for these have generally been well over 2,000 pounds. With PMF “foamie” construction, similar designs can be made that weigh less than half that.
Another guy built a “foamie” camper atop a Tesla 85 kWh battery pack to act as a range extender for his Rav4 EV, and later a Model X. The battery pack is obviously not going to be light, but the lightweight construction of the foam camper on top of it allows for that to be less of a problem. Plus, it more than made up for any towing losses.
The “Slidavan” above is a great starting point, but it’s still small by my family’s standards. But, I could easily tow something that weighs double what it does with my Bolt EUV (this couple I wrote about recently proves this). A wider camper that sits about 5 feet tall folded down would still tuck nicely behind the EUV, and give 7-8 feet of headroom folded up.
Plus, I could build a rear slideout that pops up itself, and tucks inside the box when being towed. The rear slide could almost double the interior room when parked, kind of like a cross between the “Slidavan” and this contraption:
This would make for a lot more weight, but with just one slideout that pops up like the “Slidavan,” the weight would still land somewhere around 1200 pounds, which is still ultralight by American standards, but would give the wife and kids the room they demand.
Compared to an EV or even something like the Aptera that’s built with advanced composite materials, this idea of building a camper with foam, screen, or cloth, and glue is primitive. But, light weights and flexible shaping can still give amazing efficiency and environmental benefits without using the latest “whizbang” technology out there.
Perhaps more importantly, it can give EV drivers with a family a camper they can tow, even with a budget EV like I drive. Being able to visit nature without screwing it up as much is a great thing.
The big question now is whether camper manufacturers will start picking up similar technology to do a better job of selling lightweight campers to the masses who don’t want to DIY it. If that can happen, we might see a big shift in the industry to support EV drivers.
Featured image by Phoenix7777, CC-BY-SA 4.0 License.
Jennifer Sensiba is a long time efficient vehicle enthusiast, writer, and photographer. She grew up around a transmission shop, and has been experimenting with vehicle efficiency since she was 16 and drove a Pontiac Fiero. She likes to explore the Southwest US with her partner, kids, and animals. Follow her on Twitter for her latest articles and other random things: https://twitter.com/JenniferSensiba
#1 most loved electric vehicle, solar energy, and battery news & analysis site in the world. Support our work today!
Advertise with CleanTechnica to get your company in front of millions of monthly readers.
One thing I’ve written a fair amount about here is electric RVing. The good news? It’s definitely possible. If you’ve got money for a...
I’ve written quite a few articles on here about electric RVing. Why? Because gas-powered RVing is EXPENSIVE. This is especially true for the gas...
With more people remote-working than ever, the idea of hitting the road like Jack and never coming back (no more no more) sounds like...
Going completely off grid is tough, especially with an EV. You can go almost anywhere with the right gas or diesel-powered vehicle, and once...
Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.