Rick,
Its possible you won't find it that way because its already
fried and in an open circuited or bypass mode. But keep us updated,
we're very interested.
Bill
Feather River Solar Electric
On 6/21/2021 2:44 PM, [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]
<mailto:[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]
<mailto:[email protected]>> on behalf
of [email protected] <mailto:[email protected]>
<[email protected] <mailto:[email protected]>>
*Sent:* Monday, June 21, 2021 11:42:36 AM
*To:* RE-wrenches <[email protected]
<mailto:[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 <http://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
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