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Ram Promaster 159" roof rack

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2.8K views 38 replies 19 participants last post by  phil  
#1 ·
I cannot understand why the premade roof racks are so ridiculous expensive ranging from $1,000 to $2,500 ? I am thinking about building one myself, anyone with experience in this can guide me a bit? I am looking into "C" channel aluminum rails...
 
#3 ·
#9 ·
I would consider going with 12 gauge if you intend to mount anything in addition to solar panels. I went with the 12 gauge aluminum strut from Granger and it is plenty strong. I have not worked with the 14 gauge - it could be fine but would make me a bit nervous to use that as I have lights and some other things mounted and intend to install an awning at some point.
 
#5 ·
Hi,

8020 stuff has worked well for me. The link below is for 6' extrusion, Zoro has many other items that could help you.


Mike
 
#6 ·
#8 ·
If the roof rack is just for solar panels, there is another (cheaper, simpler) option that many of us have used. Solar panels can also be mounted directly to the roof using panel mounting feet, VHB tape, and through-roof fasteners if you don't trust VHB alone. Ours are fastened just with VHB tape. Surface prep and temp are the keys for a good bond. A roof rack is only necessary if your panels are so big they overhang the roof.
Image
 
#13 ·
Hi,
I'd 2nd Steve's suggestion that mounting the PV panels to the roof with simple angle brackets is a simple, sturdy, cheaper aesthetically pleasing and lower aero drag way to go if it meets your needs.

View attachment 119242

Our ProMaster Van Conversion — Solar Panel Mounting – Build A Green RV

Gary
Well I am trying to prevent from drilling more holes on the roof plus lowering the panels close to the roof i read contributes to a lot of heat not been able to dissipate between the panel and the roof casing less efficiency, I am leaning towards getting the 15x15 8020 aluminum extrusion rails to mount the panels on top of them.
 
#12 · (Edited)
I too was blown away with the pricing of the aftermarket roof racks, so we ended up with a simple unistrut roof rack with a roof brackets I designed my self.


 
#14 ·
I too was blown away with the pricing of the aftermarket roof racks, so we ended up with a simple unistrut roof rack with a roof brackets I designed my self.

that is a great solution and it was my first option until I started thinking that eventually I will want to install a fiamm or thule awning attached to the roof rack and I think the "C" channel solution is not sturdy enough to support the weigh of the awning so I am leaning towards the 8020 15x15 extrusion type of rail.
 
#22 ·
I used aluminum uni-strut and welded custom brackets for a Dometic 9500 self-supporting awning. I didn't have a clue what I was doing. Since then I have made everything lighter, smaller and lower to the roof, streamlined the cross bars and moved the floodlights out of the slipstream. The original build dropped MPG from ~19 to 17.5. Now it is around 17-18.5 mpg over 3000+ mile road trips.

Starting from scratch I would just VHB everything to the roof and use an awning that mounts directly to the roof-pins. Sure, its easy to bolt stuff to the 8020 or uni-strut, but it is also super easy to VHB your lights or starlink (well, I used magnets) to the roof or hood.

I originally had dreams of a small deck up top to watch sunsets with a margarita, but now, I think a folding chair next to the van works just fine and is far easier to manage and less life threatening.
 
#30 · (Edited)
if your thinking of making one. Go for it!!! I want to believe that is what mostly this forum is about. People sharing their knowledge and how they made something unique, or the research they do about a project. Like Diytech, I use strut, also known as uninstructed, c channel, u channel. Etc. for a lot of projects. In the future you can add a lot of things to strut and make adjustments. And it is easily available from the bigger home improvement stores, don’t forget to check out your electrical supply houses also, as that is what the trades use, as for which one you pick, pre galvanized, which is the most common, aluminum stainless, , hot dipped galvanized, green coated, it’s up to you to decide. And your style. you have to also consider the weight and over hang and what you are going to use it for. Now and in the future. I use the pre galvanized, common one, because it is relatively strong which I use for my kayaks, s canoe. My Kayaks are a heavier than most, because I am not a light weight. It will take many, many, years before you even begin to see any wear and tear. It may rust a little on the ends, but a little WD 40 will take care of of that. Or perhaps a quick over spray of gray paint / primer on the ends after cutting. After a year all the over spray will blend into the aging of the galvanized. A lot of people on this forum paint them and have outstanding results. I just leave them natural because it’s my industrial style. I often laugh, in my travels, when I see these expensive racks on different vans, from camper vans to work vans, and I further see strut added to these expensive manufactured roof racks to mount stuff to. 🤣😁😅. As for the mounts you use to the oval t bolts to attach the strut. That’s up to you and everyone else to help you with. 80/20 is another option a lot of people use. My friends, neighbors, and even I, laughed when I made a simple strut rack for Chevy pick up truck rack. But heck I was able to bring a boat from Florida to Chicago on it. Do not be afraid to try something you think of.