Solar circuit breaker box and Midnite SPD's

[Kemmer]

Im looking to build a roof mounted breaker box for my 2 solar arrays. It will also house my 2 Midnight solar SPD's.

I was planning on using the below Phoenix distribution blocks to properly tie in the SPD's before the breakers.

https://www.digikey.com/en/products/detail/phoenix-contact/3273146/7557956

They are rated for 690V and 24A.

I plan on having 8 panels at 43VOC and 13.73A. Totaling 344VOC.

I was considering using these terminal blocks for the ground too, but concerned that if i do receive a lightning strike or surge, the block wouldnt be able to handle it.

Should I stick with a typical ground bar?

Do you see any issues using these terminal blocks?

 

[pvgirl]

Those should be fine, for ground consider din rail mounter ground terminal blocks, these bond to the metal of din rail for the ground connection. If not that I would use a standard ground bar.

 

[MichaelK]

It's a potential failure point. I would have absolutely nothing between the ground rods, and the main grounding bussbar. The main grounding conductor should be a single unspliced copper cable from one end to the other.

 

[400bird]

A roof mounted breaker box seems like a pita!
I'd put the breaker box somewhere I can reach it with my feet flat in the ground.