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Posts: 82
Reply with quote  #11 
Back to doing a little more work on the installation. The house I live in has lots of roof space, but for the time being I'm leaving most of it alone. Since I only have a small number of panels to install I decided at least for this winter to place them above the patio in the back yard. However the patio only has about a 9 degree slope. it is no longer level and one of my landlord's requirements was no holes in the roof itself. Soooo...I decided to attach brackets to each end of the patios roof, build a frame to sit on the brackets, build up the height above the brackets so that the frame would both set level, plumb and above the roof all the way across the patio. Also because of the amount of weight that will be added and the fact that the joists which the framework brackets would be attached to are essentially only attached by toed in nails I thought I should add a few braces underneath the roof to help stiffen up the ends.

Mo Underbracing.jpg 
After determining where the side mounting brackets would be positioned I installed some 2x6 cross bracing under the roof between the two end joists.


Built some trusses out of 4x4 bases and 2x4 diagonals. They are around 32 degree angles.


Then painted them.

4x4 mount(Small).jpg  2x4 mount.jpg 
Installed the brackets on the ends. Used almost all 3/8" hardware to mount everything. The brackets have bolts going through the joists to hold them in place. On one side I used a 4x4 "spacer" and on the other side a 2x4 so that the frame would end up being level across the patio when installed. The spacers are held to the brackets with 3/8" lag bolts.

Completed Frame.jpg

Ran two 16 foot long 2x4's across the back and a few more short ones between the trusses down low for stability. Oh, the end trusses were attached to the spacers with eight 7 or 8 inch 3/8" shoulder bolts as needed. So as it stands now the framework is 15 feet across and solid as a rock. If you look closely you can see that the two middle trusses are both off the roof just a bit. The one on the right needed a couple 3/4"spacers and the left one used inch and a half. They are simply sitting under the frame but covered with some of that plastic undercoat type stuff so they don't rot and should stick to both the frame and the roof. The strings in the picture were to verify alignment. They are sagging because we got a ton of rain earlier today. So now I need to get some strut to attach the panels to. I did pick up a Victron 250/100 charge controller but still haven't picked an inverter yet. Also this will be a fully external install. All batteries and electronics will be outside the house so I am searching for some reasonably priced electrical enclosures.


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