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 ch...@solarwindworks.com From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Wednesday, March 23, 2016 2:08 PM To: RE-wrenches@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/ <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=emailclient&utm_term=oa-2115-v2-c> No threats detected. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=emailclient&utm_term=oa-2115-v2-c> www.avast.com
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