Hello everyone. I have two strings of 545W panels consisting of 6 each for now.

Panels are 1.1m wide and 2.2m tall roughly. One string is on an IBR roof, and the other on a tile roof.

Question is how many rail mounting brackets do I really need? Obviously its expensive, but how much do you realistically need to secure them?

I want to have space for a 7th panel on each string, so I figured 8 brackets each (4 top and 4 bottom rail) should be enough?

Thanks in advance

Are they 6 next to each other or 3/3

Are they portrait or landscape?

Hello Chris,

Layout is portrait.

 

That's around 8m of rail length for 7 panels. 4 brackets are not enough. I would go atleast 6 per rail.