[RE-wrenches] rapid shutdown units for obscure inverter

Mon Jun 3 00:55:20 EDT 2019

Thanks for all of the responses on this guys. I looked around and found these units from Solar BOS.

http://www.solarbos.com/content/common/common.download_file.php?action_special=download_file&sid=da4cc37711812e408480a476f2302fac&download_file_id=1549534

Cheers,
Jerry Caldwell

    On Thu May 30 2019 08:45:09 GMT-0700 (PDT), Glenn Burt <glenn.burt at glbcc.com> wrote:  

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Hi Darryl,

I have been looking into the Tigo TS4-F rapid shutdown option, including attending a webinar on their products.

As far as I have been told, they DO use a powerline carrier communications method to trigger the MLPE units.

A trigger device has to be wired to AC to detect loss of grid, and one conductor of every PV string must go through their attached CT donut which imposes this communications onto the PV wiring, and communicating with the module level components.

>From their documentation:

TS4-F units automatically enter rapid shutdown mode when the RSS Transmitter is switched off and resume energy production when power is restored to the RSS Transmitter. This solution complies with NEC 2014 & 2017 690.12 specifications utilizing power-line communication (PLC).

Please tell me what system you have that is wireless?

Thanks,

Glenn 

From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Darryl Thayer
Sent: Thursday, May 30, 2019 12:16 AM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] rapid shutdown units for obscure inverter

Try Tigo, they have a MLPE shutdown wireless and does not use PLC (Power Line  Communication).  With an unknown inverter, the inverter switching noise may trigger the Tigo's PLC to keep on or shut off.   Shutting off the inverter stoping module array current, and the AC supply to the "Gateways" loss of the heartbeat signal causes the shutdown of the modules.   I have used such an arrangement and it is passing every test.  This was maybe 1 or two years ago. Tigo may have made changes since then.  hope this helps.

On Wed, May 29, 2019 at 6:07 PM Rick Brown <rick at solshineenergyalternatives.com> wrote:

Jerry,

Check out Midnight Solar’s Rapid Shutdown Shut Off Box (SOB). 

http://www.midnightsolar.com/

rick brown
SolShine Energy Alternatives, LLC
Electrical & Solar Contracting Services
www.SolShineEnergyAlternatives.com
Check, Virginia 24072
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 May 29, 2019, at 5:44 PM, Jerry Caldwell <solarcowboy at yahoo.com> wrote:

Dear Wrenches,

We are installing a system for a project we did not design. The plans specify 5 Ginlong Solis inverters. Ginlong does not make their own rapid shutdown device, so units by Innovative Solar Products have been specified. The Innovative Solar rapid shutdowns are made to order and will take 4 weeks (not good for us).

Does anyone know another mfr that makes rapid shutdown devices that are compatible with other mfrs inverters?

Thanks,

Jerry Caldwell
Redwood Sun

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