Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC on M.A.R.S. > Additions & Improvements
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 04-24-2018, 02:54 PM   #1
PNW Fireguy
Montana Fan
 
PNW Fireguy's Avatar
 
Join Date: Nov 2015
Location: Arlington
Posts: 266
M.O.C. #18081
Solar panels and roof real estate

I am in need of a bit of assistance from those that are familiar with the Montana roof construction. The wet season in the PNW has appeared to come to a close and as such I am taking advantage of the weather to make a dent in my list of chores. I laid out my 3440RL roof for 300 watt residential mono solar panels last fall. In the interim I decided to add tilt capability. To make a long story short that extra 3/4 of an inch is making a big difference.

There are only a couple of ways that the four panels will physically fit on my roof real estate. Two of the panels will overlap the fantastic fan flange, which has a significant amount of dicor on it. They will not interfere with the fan cover operation. If the entire assembly was to need to be removed in the future the panel mount would need to be removed as well as one of the foot screws looks as to line up with the edge of the flange. While this would be far from ideal would this be a really bad idea waiting to happen to install into the flange?

Second question is how close to the roof edge can I mount the opposite feet? Is there a rounded under structure that provide ample support on the edge.

Here are a couple of pics to better illustrate my scenario.
Attached Images
File Type: jpg IMG_2445.jpg (180.6 KB, 7 views)
File Type: jpg IMG_2446.jpg (309.2 KB, 6 views)
__________________
*************************************
2015 3440RL, legacy package, Sailun S637's, Onan Commercial gen, Winegard Trav'ler (Dish), 2011 Ram 3500 Laramie dually
PNW Fireguy is offline   Reply With Quote
Old 04-24-2018, 03:21 PM   #2
Lenny K
Montana Master
 
Join Date: Jun 2014
Location: Vancouver Island
Posts: 687
M.O.C. #14417
In regards to where you want to mount your panels to the edge of the roof that is about where mine are mounted without any problems.
As for mounting by the vents as long as your screws bite into some plywood they also should be good to go.
I dicored under the feet of the legs and they provide a watertight seal.
__________________
Lenny and Ros
2012 Montana 3400RL, 680 Watts Solar, 4 x T-105 Trojans, Trimetric 2020, EMSHW50C
2009 Chevy Silverado 3500 LTZ Duramax 4x4 CC Dually, Banks Speed Brake

Lenny K is offline   Reply With Quote
Old 04-24-2018, 08:24 PM   #3
PNW Fireguy
Montana Fan
 
PNW Fireguy's Avatar
 
Join Date: Nov 2015
Location: Arlington
Posts: 266
M.O.C. #18081
Thanks Lenny K,
As luck would have with regards to the outboard mount the inboard screw catches meat no problem. However the outboard screw lands within aluminum round over. There is nothing behind that area for the threads to bite into. At least nothing within the 2 1/2" allen wrench shaft that I had handy to gauge the depth of the hole. Not feeling confident about the holding ability of a screw in that aluminum round over edge.

I am hoping that if I drill the mount about half the distance between the manufactured holes that I will catch OSB. Treating this 1st panel as a prototype to workout the kinks before moving on as all three remaining panels will present this same problem on the most outboard mounting screw.
__________________
*************************************
2015 3440RL, legacy package, Sailun S637's, Onan Commercial gen, Winegard Trav'ler (Dish), 2011 Ram 3500 Laramie dually
PNW Fireguy is offline   Reply With Quote
Old 04-24-2018, 08:41 PM   #4
BuilderBob
Montana Master
 
Join Date: Sep 2017
Location: Tacoma
Posts: 648
M.O.C. #20475
There isn't really anything behind rounded over edge at all.

Bob & Carol
Washington St
2017 HC 352RL 2008 Dodge 3500 DRW CC LB 4x4

Happy Tails
BuilderBob is offline   Reply With Quote
Old 04-24-2018, 08:46 PM   #5
BuilderBob
Montana Master
 
Join Date: Sep 2017
Location: Tacoma
Posts: 648
M.O.C. #20475
Looking at your pic can you move your bracket in so its on the plywood?
BuilderBob is offline   Reply With Quote
Old 04-24-2018, 09:12 PM   #6
PNW Fireguy
Montana Fan
 
PNW Fireguy's Avatar
 
Join Date: Nov 2015
Location: Arlington
Posts: 266
M.O.C. #18081
That particular bracket is designed to mount on the edge so that the attachment bracket lines up with the long edge of the panel frame. I thought about using a different style bracket moved further inboard from the current location however I will lose the ability to tilt the panel toward the outboard edge. At that point I could just change the mount types and move them both inward from the edges...non tilting install. I guess that is my last option.\

All of the brackets are mounted but found a pic of them online. Hopefully that illustrates what I was saying regarding the inability to move the attachment bracket away from the corner of the panel.
__________________
*************************************
2015 3440RL, legacy package, Sailun S637's, Onan Commercial gen, Winegard Trav'ler (Dish), 2011 Ram 3500 Laramie dually
PNW Fireguy is offline   Reply With Quote
Old 04-24-2018, 09:34 PM   #7
BuilderBob
Montana Master
 
Join Date: Sep 2017
Location: Tacoma
Posts: 648
M.O.C. #20475
You are so close to edge of the wood you only need to move in looks like an inch. On my old montana I mounted them just flat I haven't solar on are new one yet.
BuilderBob is offline   Reply With Quote
Old 04-25-2018, 12:10 AM   #8
Lenny K
Montana Master
 
Join Date: Jun 2014
Location: Vancouver Island
Posts: 687
M.O.C. #14417
I'm not familiar with the bracket that you are mounting onto the panel but can't you move them in a little bit on the ends that land up on your vents. You would then be able to tilt your panels towards the outside edge at least.
__________________
Lenny and Ros
2012 Montana 3400RL, 680 Watts Solar, 4 x T-105 Trojans, Trimetric 2020, EMSHW50C
2009 Chevy Silverado 3500 LTZ Duramax 4x4 CC Dually, Banks Speed Brake

Lenny K is offline   Reply With Quote
Reply

Thread Tools
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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 11:39 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.