Flat roof. 1/12 pitch 7 degrees

[BlueMarblePA]

I have about 320 Sq feet of space on a small flat roof that is southwest facing with no trees. I want to add ten solar panels maybe using unirac rm5 to this epdm rubber roof surface. It is slightly pitched.

I tried to design this with unirac builder, but they are hesitant to approve something without drilling into the roof. I would like to use a ballasted system with NO roof attachments. Is this possible? It seems to be fine, but does the slight pitch create problems?

I live in PA

 

[45North]

I have about 320 Sq feet of space on a small flat roof that is southwest facing with no trees. I want to add ten solar panels maybe using unirac rm5 to this epdm rubber roof surface. It is slightly pitched.

I tried to design this with unirac builder, but they are hesitant to approve something without drilling into the roof. I would like to use a ballasted system with NO roof attachments. Is this possible? It seems to be fine, but does the slight pitch create problems?

I live in PA

The latitude of pa is about 41 deg so this would be your best avg year-round pitch, adjustable 15 deg steeper if you want to optimize for the winter months.
Mebbe you should consider ground-mount instead?

 

[BlueMarblePA]

Just as followup. I added ten panels with Solaredge P320 optimizers (280 watt panels). The most expensive part was the >$1000 Unirac Ecofoot 5D and Ecofoot 2 Plus racking system. DC wires through 3/4" conduit to the junction box on the other part of the roof.