Lightening has a high voltage and HIgh current and High frequency. The
lightening has gathered it energy over a large area, It has either picked up
electrons or lost electrons to generate this large Potential The electrons want
to return to the earth, So you do not want that path to be through your
equipment.
1) ESTABILSH A GOOD GROUND ROD ( i had a system that had blown up about 3
times, I drove a 3/4" sectioned ground rod 80' and then drove another about 20
feet away. Tied the two together and to the frames of my modules. Then I took
aand connected to the module conductors, using a MOV similar to what Midnight
solar sells. The system is in a higher relative area, this I did in 2003 it
has never blown up since
From: James Rudolph <[email protected]>
To: RE-wrenches <[email protected]>
Sent: Friday, September 9, 2011 11:32 AM
Subject: [RE-wrenches] Designing PV systems for lightning prone areas
Dear Wrenches,
Does anybody have any best practices for designing large PV arrays on metal
building in lightning prone areas? Lightning arrestors on the DC side and Surge
suppressors on the AC load side? Any input or resources would be greatly
appreciated.
Sunny Regards,
James Rudolph
NABCEP Certified Installer
Master Electrician
SF Energy
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