It’s intermittent so I’m hopeful. 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 6:29 PM, Carl Adams <[email protected]> wrote: > > > APSmart also suggested the thermal camera but that assumes that the > array/string is up and running. If you had a single device that was out and > causing the problem that might help pinpoint it but in our case the entire > string was offline because the failed RSD was the last module in the string. > > With Kind Regards > Carl Adams > SunRock Solar > 513.290.9072 > >> On Mon, Jun 21, 2021, 5:45 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 >>>>>> 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. 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