Flat Roof Mounting systems

[Ramjam]

Having gone though all the calcs etc we just use 4 bags of sand, each 25kg, easy, cheap and plenty of weight and they sit nicely in the bin.

 

[calhalla]

Thanks Ramjam.

Do you put more weight in the ones on the outer rows?

Can you recommend a good product to keep the cables protected and tidy on the roof?

 

[edexlab]

We're doing our first ground mounted console job, concrete is in place inverter will be a 4000TL in an enclosure and I'm wondering what to do regarding bonding the array as the individual panels although butted together are not in good contact so it seems that we'll be bonding each panel and taking to a spike ,can anyone who has done these advise whether they do this or is there a better method ?

 

[Antscran]

We have built larger ground mounted systems using a piled system and tables constructed of Aluminium, we joined each table together with an earth link to ensure all the tables and panels are at the same potential.

 

[Antscran]

Thanks Ramjam.

Do you put more weight in the ones on the outer rows?

Can you recommend a good product to keep the cables protected and tidy on the roof?

The roof will have wind zones which usually go from A to D on a flat roof or more depending on the roof type, A is usually a corner zone, B the edge zone nearest the gable, then C and D. The ballast requirements are usually greater in zones A and B, so by avoiding these zones you can reduce the overall load on the roof. Also by decreasing the angle of the system can aid in reducing the ballast, a good system for this is made by Schletter called Alu-Light which only inclines the panel at 12.5 deg, the system is also made in a box style shape so helps to funnel the wind away and reduce uplifting and sliding due to wind pressures.

 

[alexpau]

Hi

if you need ny help let me know i am a solar PV specialist for Hilti