What Hardware For Flat Roof Mounting?

[markpj23]

I have a flat section of roof that is plain old hot mopped roll roofing. I want to install the panels at a 26 deg angle. I've found a few mounting systems that look to be very expensive and hope that there's something else out there? This will be an off-grid system just to run a pool pump so I do not plan to go after permits.
Any suggestions?

 

[sunshine_eggo]

Worth comparing the results of the two tilts on PVWatts (link #1 in my sig). You may find the complexity of tilting on a flat roof just doesn't pay dividends.

 

[42OhmsPA]

Securing your Solar panels against wind

I am not comparing Solar vs Wind. It is almost typhoon season here in Philippines. 100kph is meh. At least we get 150kph twice a year. A $200 25kg panel can easily do $10,000 damage or worse kill someone when sent flying. So I want to protect my panels against strong wind so I came across this...

diysolarforum.com

Might help

 

[Supervstech]

I have a flat section of roof that is plain old hot mopped roll roofing. I want to install the panels at a 26 deg angle. I've found a few mounting systems that look to be very expensive and hope that there's something else out there? This will be an off-grid system just to run a pool pump so I do not plan to go after permits.
Any suggestions?

Tar roof... flat...
Oof.
Whats under the roof?
Are leaks a concern?
If it were me, i would cut out a section, mount feet to the rafters, and install flashings around them...

Anything you set on a flat tar roof will cause a leak...

 

[Danke]

Worth comparing the results of the two tilts on PVWatts (link #1 in my sig). You may find the complexity of tilting on a flat roof just doesn't pay dividends.

Plus you can get more panels on roof at a swallower tilt. So may produce as much power compared to the higher optimum tilt.

I have a flat roof and and am planning on a ballast system with 10° tilt.

 

[OzSolar]

I have a flat section of roof that is plain old hot mopped roll roofing. I want to install the panels at a 26 deg angle. I've found a few mounting systems that look to be very expensive and hope that there's something else out there? This will be an off-grid system just to run a pool pump so I do not plan to go after permits.
Any suggestions?

Florida? Pool pumping? Looks like a Southern latitude optimized for the months when the sun is pretty high in sky. You likely can mount them flat and get all you need.

 

[MichaelK]

I simply constructed a triangular frame made out of half-channel unistruts, which I then bolted onto the roof. It holds the panels up at the correct angle for my latitude.

 

[sunshine_eggo]

I simply constructed a triangular frame made out of half-channel unistruts, which I then bolted onto the roof. It holds the panels up at the correct angle for my latitude.
View attachment 144897

I am very disappointed in you. Surely, you could have put them on a pivot for daily adjustment!

 

[MrM1]

Couple bags a sakrete, a ratchet strap. And some Uni Strut "Get 'er done?"

 

[Ahjwinth]

I have this system on my roof for 5 years now, a tar roof. I took care the weight is spread over a wider surface to avoid damage. I just don’t know if they sell in US.
https://www.valksolarsystems.com/en.../flat-roofs/landscape/south/valkpro-l10-south