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03-23-2021, 02:09 AM
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#1
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Member
Brand: Thor Motor Coach
Model: Vegas
State: Florida
Posts: 88
THOR #21560
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Solar Panels install
I may have missed something here but I've wondered for a while how solar panels are attached to the roofs of motor homes. I don't have any intention of installing them on my MH- not now, anyway- but I would like to know- for future reference. I'm sure there must be more than one way to skin a cat- as the saying goes- and I'd like to hear about the range of (successful) methods. TIA. Ed.
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03-23-2021, 03:10 AM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: Forest River Forester 235
State: Indiana
Posts: 4,884
THOR #6826
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Quote:
Originally Posted by Seabee
I may have missed something here but I've wondered for a while how solar panels are attached to the roofs of motor homes. I don't have any intention of installing them on my MH- not now, anyway- but I would like to know- for future reference. I'm sure there must be more than one way to skin a cat- as the saying goes- and I'd like to hear about the range of (successful) methods. TIA. Ed.
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Lots of folks use flexible panels and just glue them down. I chose to put a single 80W rigid panel on with “Z” brackets screwed into the aluminum rafters. Rigid panels last longer and mounting this way leaves an air space underneath which aids cooling. My one panel requires no attention and is more than adequate to keep both the house and chassis batteries topped up when in storage. I consider it one of the best things I’ve added to my coach.
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03-24-2021, 10:23 PM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Maryland
Posts: 123
THOR #5251
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Quote:
Originally Posted by Pete'sMH
Lots of folks use flexible panels and just glue them down. I chose to put a single 80W rigid panel on with “Z” brackets screwed into the aluminum rafters. Rigid panels last longer and mounting this way leaves an air space underneath which aids cooling. My one panel requires no attention and is more than adequate to keep both the house and chassis batteries topped up when in storage. I consider it one of the best things I’ve added to my coach.
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Try looking at Zamp portable 90 watt
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03-24-2021, 10:59 PM
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#4
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Use the SEARCH function
But here’s a good discussion we had in the past about Solar mounting, flex vs rigid panels, and more...
https://www.thorforums.com/forums/f2...nts-16062.html
By the way...
I have Drill-less solar mounts being used on 3 rigid panels. In fact I had to remove one panel and the mounts to provide space for a Trav’ler dish.
They removed easily with a plastic putty knife and a little persuasion. No holes left behind.
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'17 Vegas 24.1
Fallbrook, CA
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03-29-2021, 01:58 PM
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#5
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Member
Brand: Thor Motor Coach
Model: Vegas
State: Florida
Posts: 88
THOR #21560
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Solar Mount
Thanks for the replies. I kind of figured those two ways of mounting them. I'll have to research the locations of the roof supports now so when the time comes I'll know where to look. Thanks again. Ed
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03-29-2021, 02:21 PM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Quote:
Originally Posted by Seabee
Thanks for the replies. I kind of figured those two ways of mounting them. I'll have to research the locations of the roof supports now so when the time comes I'll know where to look. Thanks again. Ed
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The panels are light weight
Solid panels are 15# vs 3# for Flex panels
So there’s no need to over-analyze
The Vegas/Axis roof is TPO rubber over 1/16” sheet metal & plywood
There’s enough “bite” to hold screws if you don’t strip it
Here’s my current solar set-up with Sika-Flex adhesive only
Along with my Winegard SK-1000 (which is screwed-in)
You can see that I use Gorilla Tape to fasten cables. Works just fine without adding holes.
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'17 Vegas 24.1
Fallbrook, CA
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03-29-2021, 03:57 PM
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#7
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Are those the mounts from Renogy?
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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03-29-2021, 04:08 PM
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#8
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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Quote:
Originally Posted by Bob Denman
Are those the mounts from Renogy?
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Yes they are
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'17 Vegas 24.1
Fallbrook, CA
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03-29-2021, 05:24 PM
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#9
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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I think they're the ones that we'll use...
(When we buy our kit: of course!)
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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03-29-2021, 06:02 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 2,227
THOR #13362
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If I was doing solar install again, I would probably really consider flex panels.
Although flex panels are said to deteriorate more quickly than solid, and there is no airspace under panel to diffuse heat, they are light weight & simple install vs solid.
Just Eternabond tape around the outside edge. No screws required.
And my rig is parked under cover so the panels are not abused in 24/7 sun.
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'17 Vegas 24.1
Fallbrook, CA
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03-29-2021, 07:01 PM
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#11
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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We were seriously considering the flexible panels...
...Until I saw reports of them losing about 50% of their output to heat degradation after only two years.
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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03-29-2021, 07:27 PM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: Axis 24.1
State: Connecticut
Posts: 1,794
THOR #20289
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Quote:
Originally Posted by Bob Denman
We were seriously considering the flexible panels...
...Until I saw reports of them losing about 50% of their output to heat degradation after only two years.
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Lots of years ago I bought three 35 watt flexible panels and mounted them on the bimini of my sailboat by stitching through the eyes on the corners. Five years later they were putting out half of their rated power.
I don't know if they have gotten better, but these sure lost about 10% per year.
David
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03-29-2021, 07:30 PM
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#13
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Does anyone have an estimate for how long a rigid panel with airflow around it should last?
(And make useable amounts of power? )
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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03-29-2021, 07:34 PM
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#14
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Senior Member
Brand: Thor Motor Coach
Model: Forest River Forester 235
State: Indiana
Posts: 4,884
THOR #6826
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Quote:
Originally Posted by Seabee
Thanks for the replies. I kind of figured those two ways of mounting them. I'll have to research the locations of the roof supports now so when the time comes I'll know where to look. Thanks again. Ed
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Ordinary stud finder located my aluminum “rafters” perfectly. Mine (SOB) were 16 inches on center.
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03-29-2021, 07:35 PM
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#15
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Senior Member
Brand: Thor Motor Coach
Model: Forest River Forester 235
State: Indiana
Posts: 4,884
THOR #6826
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Quote:
Originally Posted by Bob Denman
Does anyone have an estimate for how long a rigid panel with airflow around it should last?
(And make useable amounts of power? )
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25 years according to Renogy.
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03-29-2021, 07:46 PM
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#16
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by Pete'sMH
25 years according to Renogy.
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So even if their "marketing engineers" came up with that number
I've got to figure that they're still good for better than a decade.
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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03-29-2021, 09:05 PM
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#17
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Senior Member
Brand: Thor Motor Coach
Model: Forest River Forester 235
State: Indiana
Posts: 4,884
THOR #6826
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Quote:
Originally Posted by Bob Denman
So even if their "marketing engineers" came up with that number
I've got to figure that they're still good for better than a decade.
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I’m certainly expecting mine to last longer than I will!!
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03-29-2021, 10:01 PM
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#18
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by Pete'sMH
I’m certainly expecting mine to last longer than I will!!
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Well I'm hoping you you out-live them..
...And I'm also hoping that they out-live any expectations you have of them!
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03-29-2021, 10:07 PM
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#19
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Senior Member
Brand: Thor Motor Coach
Model: 2020 Magnitude SV34
State: Florida
Posts: 4,160
THOR #12751
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My Renogy flexible 160W panels are two years old and they are still cranking out the power.
Now I did not fasten mine directly to the roof. I mounted them to corrugated plastic sheets that allow for heat dissapation. Then I used EternaBond tape to fasten the corrugated sheets to the roof.
Renogy warranties them for 5-years and for the weight savings and ease of installation, I think they are well worth it.
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03-30-2021, 05:41 PM
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#20
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Member
Brand: Thor Motor Coach
Model: Vegas
State: Florida
Posts: 88
THOR #21560
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This is info I really appreciate. I didn't realize the sheetmetal also covered the roof . After 30 years of working on thin skinned aircraft I'm confident I can effectively screw into the roof without stripping the screws. I may be going the solar route sooner than I thought. Also, that GORILLA tape is a favorite of mine so I will be using that, too. Thanks, again. Ed
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