Interesting note. We considered this variable even if there is supposed compatibility.
We have gone back and replaced the MC4 connectors with Tyco connectors to ensure this is not the source. Can’t really say it has helped so far. I’m leaning toward AC / DC interference at peak irradiance. This snip from the Sunpreme datasheet. From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay Sent: Monday, May 8, 2017 12:18 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me??? What connectors are they, and are you using same brand when you connect to comber/junction box? I have seen issues with non same connectors. jay peltz power On May 8, 2017, at 7:44 AM, Howard Arey <scot.a...@solarcentex.com <mailto:scot.a...@solarcentex.com> > wrote: Sunpreme GxB-360.. Datasheet attached. 95% of the issues are with these modules. Howard “Scot” Arey 254-300-1228 <mailto:scot.a...@solarcentex.com> scot.a...@solarcentex.com -----Original Message----- From: RE-wrenches [ <mailto:re-wrenches-boun...@lists.re-wrenches.org> mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Angelini Offgrid Solar Sent: Monday, May 8, 2017 9:29 AM To: RE-wrenches < <mailto:re-wrenches@lists.re-wrenches.org> re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me??? What make of bi-facial are you using? The old Sanyo bi-facial had a few of these that had to back for warranty, but that was 10 years ago. Have you performed insulation resistance testing on all of your wiring? -----Original Message----- From: "Howard Arey" <scot.a...@solarcentex.com <mailto:scot.a...@solarcentex.com> > Sent: ‎5/‎5/‎2017 14:17 To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org <mailto:re-wrenches@lists.re-wrenches.org> > Subject: [RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me??? I can't imagine I'm the only one having this problem. Starting to suspect from Fronius that the problem is deeper than they let on. 240 faults are arc-fault detection for Fronius. We have checked every variable on our end - connectors, firmware, clean wire pulls. My teams are not perfect but I l know they are very good and know how important the clean installs are for us. Most but not all of my issues are with bifacial modules. Anybody else have this issue? Howard "Scot" Arey Owner, Solar CenTex 254-300-1228 scot.a...@solarcentex.com <mailto:scot.a...@solarcentex.com>
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