Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 12-04-2012, 11:58 PM   #1
Senior Member
vsheetz's Avatar

Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 8,415
Adhesives or screws for solar panel mounting?

Adhesive or screws for solar panel mounting? What have you used? Pros and cons? Ability to be removed if needed?

The wires running from the panels to combiner box - how best to secure them to the roof?


Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-05-2012, 05:23 AM   #2
Senior Member
Shadowcatche's Avatar
iRV2 No Limits Club
Join Date: Nov 2010
Posts: 1,183
I have a set of ABS solar panel mounts with large mounting base. I did not want to use screws and felt that 3M VHB tape might work. After talking with a 3M engineer at length about the calculations of necessary surface area which the mounts had. Proper cleaning and use of the correct VHB tape and I have a 185W panel mounted with no holes.
The plus side no holes and removable with a fair amount of effort (orange and a couple of types of solvents). It will stand up to wind speeds over 110MPH, but you need to have the surface area on the mounts.

Shadowcatche is offline   Reply With Quote
Old 12-05-2012, 05:45 AM   #3
Senior Member
mgscott4's Avatar
Workhorse Chassis Owner
Join Date: May 2009
Location: Kansas City, MO./Pollock, LA.
Posts: 1,526
I used both screws and adhesives, sort of. I have a rubber roof and there is only 1/8th inch piece of Luan under the rubber. I used Molley bolts and Dicor self leveling sealant. The sealant has some adhesive features.

I used 2 pieces of aluminum angle iron bolted together with a slot in the middle in the shape of a Z. 3 Molley bolts per bracket on the roof, 6 brackets per panel for a total of 18 holes per panel. Dicor in each hole with the Molley bolt, Dicor on roof under each bracket, and Dicor over the top of each bracket after screwed down. No leaks yet.

The slots on the Z brackets allow for the slight curvature of my roof and allowed me to angle the panels down in the front for wind over the panels not under while driving. The bolts on the Z bracket allow for removal or tilting if needed without removing the sealed roof bracket.

The wires between panels and to the combiner box can be secured using the same Dicor self leveling sealant directly to the roof about every 2 to 3 feet.

Here are a few examples of what others have done.

RV.Net Open Roads Forum: Tech Issues: Forum Members Solar Installations With Pics
06 Hurricane 34FT WH W20 Chassis 8.1L 129K, Steersafe, Koni Shocks, DIY Trac Bar, Tri-Metric 2025RV Battery Monitor, 4-6V Batteries, Scan Gauge 2, Crossfires, 735W Solar Morningstar MPPT-60, KVH R5 In-Motion Sat, XM Radio, 07 Chevy Malibu Maxx Toad, Falcon 2, Brake Buddy, Escapee
mgscott4 is offline   Reply With Quote
Old 12-06-2012, 07:05 AM   #4
Senior Member
Tiffin Owners Club
Join Date: Jun 2008
Posts: 584
Most places I've seen say that with fiberglass roof, only using 3M VHB tape is the preferred way. With rubber roofs, you have to use screws.
michelb is offline   Reply With Quote
Old 12-06-2012, 08:24 AM   #5
Senior Member
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 21,176
Screws or Adheasive...


Lay the thing down and figure out where the screws will go

now lift it and lay a pad of adheasive (Or Dicor caulk) on the spot where the screw will screw in.

now lay the mount back down and insert screw

now Calk over the screw to completly seal

Strong (Thanks to the the screw) leakproof (Thanks to the caulk)

With two exceptions that is how everything on my roof is mounted.

Those 2.. Air conditioners, instead of screws it's bolts, and instead of caulk a foam gasket, but the concept is the same.
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 12-06-2012, 08:39 AM   #6
Senior Member
WheelingIt's Avatar
Monaco Owners Club
Join Date: Oct 2010
Location: On Wheels
Posts: 1,979
We used only 3M VHB tape on our fiberglass roof. No holes and solid as a rock. Two years fulltiming with the tape so far and no issues at all. With a fiberglass roof I'd choose the same again.
12 paws, 40 feet and the open road
WheelingIt is offline   Reply With Quote
Old 12-12-2012, 10:41 AM   #7
Tiffin Owners Club
Join Date: Sep 2012
Location: jackson,nj
Posts: 56
i plan on using tape to mount my solar panels. does anyone that did this remember the number of the 3m tape they used?
alv3769 is offline   Reply With Quote
Old 12-15-2012, 04:07 PM   #8
Senior Member
Manuel B's Avatar
Join Date: Mar 2012
Location: Alabama
Posts: 144
The factory 50W panel was missing due to hail damage when I bought mine, I bought a 120W replacement which was much larger and I didn't want to drill more holes in my fiberglass roof so I went to the boat supply shop and bought a tube of marine sealant adhesive, the panel covers where the wire comes out, I didn't know about the 3M tape, what I used came in two flavors, semi or permanent, I picked permanent,
1990 34' Hawkins Motor Coach, Oshkosh/460 Ford EFI. '97 Subaru Impreza 5 speed towd, NorthEast Alabama.
Manuel B is offline   Reply With Quote
Old 12-15-2012, 06:23 PM   #9
Senior Member
YC1's Avatar

Holiday Rambler Owners Club
Join Date: Jun 2011
Posts: 4,573
I would not sleep well with tape only. I have seen this tape give up way to often. Four screws and the shear force to tear it off increases tremendously. If you use both and then cover with Dicor you should never have an issue. You can still take it apart as well.
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate
YC1 is offline   Reply With Quote
Old 12-15-2012, 09:27 PM   #10
Senior Member
TdogKing's Avatar
Join Date: Feb 2012
Location: Small Town USA , California
Posts: 1,328
I wouldn't trust just tape with expensive Solar Panels. I've driven in some pretty high head winds in the So Cal desert areas and wondered if anything was going to left on top my Motorhome when I got home !! Everything else on your roof is put on with screws and sealer so Solar Panels is no different. I mounted 3 on mine over 10 years ago and never had a problem but I take care of my roof also.
TdogKing is offline   Reply With Quote
Old 12-16-2012, 04:48 AM   #11
Senior Member
Shadowcatche's Avatar
iRV2 No Limits Club
Join Date: Nov 2010
Posts: 1,183
You have to do the calculations for surface area to make sure you have enough and you have to prep the attachment area. The semi's going down the road with no apparent rivets/screws in all likelihood are using VHB tape. The mounts I am using have a great deal of area.

Shadowcatche is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:58 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.