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PV mounting gear not grounded

on_the_roots · 2023-07-19 14:46:36

Just had my panels installed on my roof and the electrician said the PV mounting gear was not grounded. Only +/- cables come down from there. The inverter is grounded though. Is it ok not to have grounding like this? What if there is lighting hitting my panels/rails?

19-07-2023 2:46pm

#1

on_the_roots

Registered Users, Registered Users 2 Posts: 211 ✭✭

Join Date: January 2021

Posts: 202

Just had my panels installed on my roof and the electrician said the PV mounting gear was not grounded. Only +/- cables come down from there.
The inverter is grounded though.
Is it ok not to have grounding like this? What if there is lighting hitting my panels/rails?

0

Comments

#2 19-07-2023 2:54pm

10-10-20

Registered Users, Registered Users 2 Posts: 8,073 ✭✭✭

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Each panel is supposed to be bonded (grounded effectively) but a frame mounted on a high roof is questionable. If it was a metal shed or structure in normal reaching distance then yes, but I think that panel bonding alone is sufficient on a roof. Each panel will have an earthing point on the rear of the rails.
The reason is that stray voltages may accumulate across the panels and may exceed 50v DC.

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