[RE-wrenches] AFCI trip on metal roof

[Chris Worcester]

Years ago, 2007 we had a similar situation & found a pinched module wire
that was suspect. We insulated it, retested and same tripping in the old
sunny boy. Tech support kept pointing at the wiring, then finally coughed up
a replacement under warranty, as the inverter was the only weak link left.
No problems since then with that system. 

 

Chris Worcester

Solar Wind Works

NABCEP Certified PV Installer

Office 530-582-4503

Cell 530-448-9692

Fax 530-582-4603

www.solarwindworks.com

chris at solarwindworks.com

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Drake
Sent: Wednesday, March 23, 2016 2:08 PM
To: RE-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] AFCI trip on metal roof

 

Hello Wrenches, 

We have a project with an array on a large metal roof. The AFCI has been
tripping. Investigating the system, there is no evidence of any arcing: the
wiring and connections are all very tight. 

SMA tech support says it is likely that the nuisance tripping comes from
electrical noise getting picked up by the large metal roof. 

What has been your overall experience with nuisance tripping of arc fault
protection? What were the suspected causes? What was the solution?

Thanks,

Drake 

Drake Chamberlin
Athens Electric LLC
OH License 44810
CO License 3773
NABCEP Certified Solar PV 
740-448-7328
http://athens-electric.com/ 




 
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