Wrenches Can you slit the array in half more or less as a process of elimination, I've used fire raptor and we had a glitch unit and it was pretty easy once we split up the array. Jerry NABCEP PV Inspector
On Mon, Jun 21, 2021, 2:45 PM [email protected] < [email protected]> wrote: > I’m going to try the thermal camera trick before resorting to lifting > modules. > > rick brown > SolShine Energy Alternatives, LLC > Electrical & Solar Contracting Services > www.SolShineEnergy.com > Check, Virginia 24072 > O: 540.235.3095 > M: 540.808.9502 > > VA Class A Contractor Lic# 2705147660 > VA Master Electrician Lic# 2710062762 > VA Alternative Energy Systems Installer > NABCEP Certified PV Installation Professional 110112-21 > > > > > > On Jun 21, 2021, at 5:42 PM, Jeremy Coxon <[email protected]> > wrote: > > We are going through a similar scenario right now with APSmart RSD’s and > a SMA 7.0 that will start up and run, then the next day no start up at > dawn. Perform a hard reset on inverter and array starts up, runs all day, > then the next morning we’re back to doing a hard reset to get array to > start up. > > Very simple system 2 strings of 12, voltages at inverter around 8V > (12x0.7=8.4V) - short run with oversized conductors means very small > voltage drop thankfully. SMA says we need to be on site to troubleshoot, > but without the little APS RSD Eye, I’m thinking they’re just going to say > it’s not their problem. APS’s troubleshooting guide basically says lift > each panel to find the problem. Not a happy camper! > > Jeremy Coxon NABCEP > Certified MWBE > > Sent from my iPhone > > On Jun 21, 2021, at 12:43 PM, "[email protected]" < > [email protected]> wrote: > > Carl, > That’s very helpful. We’ll check each module and report back. > > rick brown > SolShine Energy Alternatives, LLC > Electrical & Solar Contracting Services > www.SolShineEnergy.com > Check, Virginia 24072 > O: 540.235.3095 > M: 540.808.9502 > > VA Class A Contractor Lic# 2705147660 > VA Master Electrician Lic# 2710062762 > VA Alternative Energy Systems Installer > NABCEP Certified PV Installation Professional 110112-21 > > > > > > On Jun 21, 2021, at 12:15 PM, Carl Adams <[email protected]> wrote: > > > Rick, > I was recently troubleshooting a similar problem. Open circuit voltage on > all strings was as expected but under load one string was showing almost no > power. Tracked this down to a failed APSmart device which had clear signs > of thermal damage. Pictures 1.1 and 1.2. . > A second failed unit some months later had a thermal failure and this one > toasted the module. Picture 2.1. > > These devices can make it difficult to do any meaningful string level > testing. The devices output a nominal 0.7 volts in open circuit > conditions. That documentation says this voltage reading is *+* 25%, so > in theory you could have a number of devices which were not working and > your string voltage would not indicate that. > > APSmart does make a test device which can help you verify the > functionality. The device is called RSD-EYE+ Detector. You can contact > YI Kang , *APPLICATION & TECHNICAL SUPPORT MANAGER,* > *MLRSD *at APSmart for additional information. 737.218.8486 > <FailedAPSmart1.2.jpg> > > <FailedAPSmart2.1.jpg> > > <FailedAPSmart1.1.jpg> > > With Kind Regards > Carl Adams, President > SunRock Solar, LLC > 513.290.9072 (mobile) > 513.766.6025 (office) > > > > On Mon, Jun 21, 2021 at 11:55 AM Lloyd Hoffstatter < > [email protected]> wrote: > >> Rick, >> I would check with SMA to make sure you have the latest firmware. >> >> Best regards, >> Lloyd >> >> Lloyd Hoffstatter >> Sunstruck Consulting >> >> Get Outlook for iOS <https://aka.ms/o0ukef> >> ------------------------------ >> *From:* RE-wrenches <[email protected]> on >> behalf of [email protected] <[email protected]> >> *Sent:* Monday, June 21, 2021 11:42:36 AM >> *To:* RE-wrenches <[email protected]> >> *Subject:* [RE-wrenches] RSD Troubleshooting Help >> >> Wrenches, >> >> I’m in need of some troubleshooting help on a newly installed system with >> rapid shutdown. System consists 2 SMA SB5.0-1 SP-US-41 (RSD version), RSD >> devices are APS RSD-S-PLC. Each SB is configured with two strings of 9. >> Modules are REC Alpha 360s. >> >> This system was fully functional for about 1 week before things went >> awry. Initial symptoms were that one of the two strings read 0V 0A on the >> display while the other read ~315V, 5A. The RSD devices output ~700mV each >> when in the off mode (a nice verification feature). I’m reading the correct >> voltage - 6.75V - on both strings when in off mode. Once the Sunny Boy >> comes on line I’m reading around 10V on the faulty string and the correct >> voltage - ~315V - on the other string. >> >> The above seems to indicate that each RSD is getting sufficient DC >> voltage from the module. Short of pulling each module and doing a visual >> check what else can I look at? How do you isolate a faulty RSD device? >> >> And as luck would have it, everything is functional at the moment. >> >> Thanks, >> >> rick brown >> SolShine Energy Alternatives, LLC >> Electrical & Solar Contracting Services >> www.SolShineEnergy.com >> Check, Virginia 24072 >> O: 540.235.3095 >> M: 540.808.9502 >> >> VA Class A Contractor Lic# 2705147660 >> VA Master Electrician Lic# 2710062762 >> VA Alternative Energy Systems Installer >> NABCEP Certified PV Installation Professional 110112-21 >> >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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